{"id":57861,"date":"2025-08-15T21:30:02","date_gmt":"2025-08-15T13:30:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/57861.html"},"modified":"2025-08-15T21:30:02","modified_gmt":"2025-08-15T13:30:02","slug":"c%e8%af%ad%e8%a8%80%e8%87%aa%e5%ad%a6-c%e8%af%ad%e8%a8%80%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e5%92%8c%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/57861.html","title":{"rendered":"C\u8bed\u8a00\u81ea\u5b66\u2014\u2014C\u8bed\u8a00\u6570\u636e\u7c7b\u578b\u548c\u53d8\u91cf"},"content":{"rendered":"

1. \u6570\u636e\u7c7b\u578b\u4ecb\u7ecd<\/span><\/h4>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C\u8bed\u8a00\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u5305\u62ec\u6574\u578b\u3001\u6d6e\u70b9\u578b\u548c\u5b57\u7b26\u578b\u3002\u6574\u578b\u7528\u4e8e\u5b58\u50a8\u6574\u6570，\u6d6e\u70b9\u578b\u7528\u4e8e\u5b58\u50a8\u5c0f\u6570，\u5b57\u7b26\u578b\u7528\u4e8e\u5b58\u50a8\u5355\u4e2a\u5b57\u7b26\u3002\u4e0b\u9762\u76d8\u70b9\u4e00\u4e0bC\u8bed\u8a00\u63d0\u4f9b\u7684\u5404\u79cd\u6570\u636e\u7c7b\u578b，\u672c\u7ae0\u8282\u4e3b\u8981\u63a2\u8ba8\u5185\u7f6e\u6570\u636e\u7c7b\u578b\u3002<\/span><\/p>\n

\"\"<\/span><\/p>\n

1.1\u3001\u5b57\u7b26\u578b<\/span><\/h6>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5b57\u7b26\u578b（char）\u662fC\u8bed\u8a00\u4e2d\u7528\u4e8e\u5b58\u50a8\u5355\u4e2a\u5b57\u7b26\u7684\u6570\u636e\u7c7b\u578b，\u5360\u75281\u5b57\u8282\u5185\u5b58\u7a7a\u95f4\u3002\u5b57\u7b26\u578b\u53d8\u91cf\u5b9e\u9645\u5b58\u50a8\u7684\u662f\u5bf9\u5e94\u5b57\u7b26\u7684ASCII\u7801\u503c（\u6574\u6570），\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u53c2\u4e0e\u6574\u6570\u8fd0\u7b97\u3002<\/span><\/p>\n

char
\n [signed] char
\n unsigned char<\/p>\n

char ch1 = 'A'; \/\/ \u76f4\u63a5\u8d4b\u503c\u5b57\u7b26
\nchar ch2 = 65; \/\/ \u4f7f\u7528ASCII\u7801\u8d4b\u503c（\u5341\u8fdb\u5236）
\nchar ch3 = '\\\\x41'; \/\/ \u4f7f\u7528ASCII\u7801\u8d4b\u503c（\u5341\u516d\u8fdb\u5236）
\nchar ch4 = '\\\\101'; \/\/ \u4f7f\u7528ASCII\u7801\u8d4b\u503c（\u516b\u8fdb\u5236）<\/p>\n

1.2\u3001\u6574\u578b<\/span><\/h6>\n

\/\/\u77ed\u6574\u578b
\nshort [int]
\n[signed] short [int]
\nunsigned short [int]<\/p>\n

\/\/\u6574\u578b
\nint[signed] int
\nunsigned int<\/p>\n

\/\/\u2ed3\u6574\u578b
\nlong [int]
\n[signed] long [int]
\nunsigned long [int]<\/p>\n

\/\/\u66f4\u2ed3\u7684\u6574\u578b
\n\/\/C99\u4e2d\u5f15\u2f0a
\nlong long [int]
\n[signed] long long [int]
\nunsigned long long [int]<\/p>\n

1.2.1\u7c7b\u578b\u4fee\u9970\u7b26<\/span><\/h6>\n
  • \n

    signed<\/span><\/p>\n

      \n
    • \u663e\u5f0f\u58f0\u660e\u4e3a\u6709\u7b26\u53f7\u6574\u578b（\u9ed8\u8ba4\u60c5\u51b5\u4e0b，int\u3001short\u3001long\u7b49\u4e3a\u6709\u7b26\u53f7）\u3002<\/span><\/li>\n
    • \u793a\u4f8b：signed int i = -10;<\/span><\/li>\n<\/ul>\n<\/li>\n
    • \n

      unsigned<\/span><\/p>\n

        \n
      • \u58f0\u660e\u4e3a\u65e0\u7b26\u53f7\u6574\u578b，\u53ea\u80fd\u8868\u793a\u975e\u8d1f\u6570\u3002<\/span><\/li>\n
      • \u793a\u4f8b：unsigned int j = 10;<\/span><\/li>\n
      • \u65e0\u7b26\u53f7\u6574\u578b\u53ea\u80fd\u8868\u793a\u975e\u8d1f\u6570，\u8303\u56f4\u662f\u76f8\u5e94\u6709\u7b26\u53f7\u6574\u578b\u7684\u975e\u8d1f\u90e8\u5206\u7684\u4e24\u500d\u3002<\/span><\/li>\n<\/ul>\n<\/li>\n
        1.3\u3001\u6d6e\u70b9\u578b<\/span><\/h6>\n

        float
        \ndouble
        \nlong double<\/p>\n

        1.3.1\u3001\u6d6e\u70b9\u578b\u6570\u636e\u7c7b\u578b<\/span><\/h6>\n

        C\u8bed\u8a00\u4e2d\u7684\u6d6e\u70b9\u578b\u7528\u4e8e\u8868\u793a\u5c0f\u6570\u6216\u5b9e\u6570，\u4e3b\u8981\u5305\u542b\u4ee5\u4e0b\u4e09\u79cd\u7c7b\u578b：<\/span><\/p>\n

          \n
        • float：\u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b，\u5360\u75284\u5b57\u8282（32\u4f4d），\u7cbe\u5ea6\u7ea66-7\u4f4d\u5c0f\u6570\u3002<\/span><\/li>\n
        • double：\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b，\u5360\u75288\u5b57\u8282（64\u4f4d），\u7cbe\u5ea6\u7ea615-16\u4f4d\u5c0f\u6570\u3002<\/span><\/li>\n
        • long double：\u6269\u5c55\u7cbe\u5ea6\u6d6e\u70b9\u578b，\u901a\u5e38\u5360\u752810\u5b57\u8282（80\u4f4d）\u6216\u66f4\u591a，\u5177\u4f53\u53d6\u51b3\u4e8e\u7f16\u8bd1\u5668\u3002<\/span><\/li>\n<\/ul>\n
          1.3.2\u3001\u6d6e\u70b9\u578b\u58f0\u660e\u4e0e\u521d\u59cb\u5316<\/span><\/h6>\n

          \u6d6e\u70b9\u578b\u53d8\u91cf\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u58f0\u660e\u548c\u521d\u59cb\u5316：<\/span><\/p>\n

          float a = 3.14f; \/\/ \u6ce8\u610f\u540e\u7f00'f'\u8868\u793afloat\u7c7b\u578b
          \ndouble b = 2.71828; \/\/ \u9ed8\u8ba4\u6d6e\u70b9\u5e38\u91cf\u662fdouble\u7c7b\u578b
          \nlong double c = 1.41421356L; \/\/ \u540e\u7f00'L'\u8868\u793along double<\/p>\n

          1.3.3\u3001\u6d6e\u70b9\u578b\u5e38\u91cf\u8868\u793a<\/span><\/h6>\n

          \u6d6e\u70b9\u578b\u5e38\u91cf\u652f\u6301\u79d1\u5b66\u8ba1\u6570\u6cd5：<\/span><\/p>\n

            \n
          • \u5341\u8fdb\u5236\u5f62\u5f0f：3.14\u30010.001<\/span><\/li>\n
          • \u6307\u6570\u5f62\u5f0f：1.23e-4（\u8868\u793a1.23\u00d710\u207b\u2074）<\/span><\/li>\n<\/ul>\n
            1.3.4\u3001\u6d6e\u70b9\u578b\u7cbe\u5ea6\u4e0e\u8303\u56f4<\/span><\/h6>\n
              \n
            • float：\u8303\u56f4\u7ea6\u00b11.2\u00d710\u207b\u00b3\u2078\u5230\u00b13.4\u00d710\u00b3\u2078\u3002<\/span><\/li>\n
            • double：\u8303\u56f4\u7ea6\u00b12.3\u00d710\u207b\u00b3\u2070\u2078\u5230\u00b11.7\u00d710\u00b3\u2070\u2078\u3002<\/span><\/li>\n
            • long double：\u8303\u56f4\u901a\u5e38\u66f4\u5927，\u5177\u4f53\u53d6\u51b3\u4e8e\u5b9e\u73b0\u3002<\/span><\/li>\n<\/ul>\n
              1.3.5\u3001\u6d6e\u70b9\u578b\u7684\u6ce8\u610f\u4e8b\u9879<\/span><\/h6>\n

              \u6d6e\u70b9\u578b\u8fd0\u7b97\u53ef\u80fd\u5b58\u5728\u7cbe\u5ea6\u8bef\u5dee，\u4f8b\u5982：<\/span><\/p>\n

              float x = 0.1f + 0.2f;
              \nprintf("%.20f\\\\n", x); \/\/ \u8f93\u51fa\u53ef\u80fd\u4e0d\u662f\u7cbe\u786e\u76840.3<\/p>\n

              \u6bd4\u8f83\u6d6e\u70b9\u6570\u65f6\u5e94\u4f7f\u7528\u8bef\u5dee\u8303\u56f4（\u5982fabs(a – b) < 1e-6）\u3002<\/span><\/p>\n

              1.3.6\u3001\u5e38\u7528\u6570\u5b66\u51fd\u6570<\/span><\/h6>\n

              C\u6807\u51c6\u5e93<math.h>\u63d0\u4f9b\u6d6e\u70b9\u8fd0\u7b97\u51fd\u6570：<\/span><\/p>\n

              #include <math.h>
              \ndouble sqrt(double x); \/\/ \u5e73\u65b9\u6839
              \ndouble pow(double x, double y); \/\/ \u5e42\u8fd0\u7b97
              \ndouble sin(double x); \/\/ \u4e09\u89d2\u51fd\u6570<\/p>\n

              1.4\u3001\u5e03\u5c14\u7c7b\u578b<\/span><\/h6>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C\u8bed\u8a00\u539f\u6765\u5e76\u6ca1\u6709\u4e3a\u5e03\u5c14\u503c\u5355\u72ec\u8bbe\u7f6e\u2f00\u4e2a\u7c7b\u578b，\u800c\u662f\u4f7f\u7528\u6574\u6570 \u5728 C99 \u4e2d\u4e5f\u5f15\u5165\u4e86 \u5e03\u5c14\u7c7b\u578b，\u662f\u4e13\u95e8\u8868\u793a\u771f\u5047\u7684\u3002\u4eceC99\u6807\u51c6\u5f00\u59cb，C\u8bed\u8a00\u5f15\u5165\u4e86_Bool\u5173\u952e\u5b57\u548c<stdbool.h>\u5934\u6587\u4ef6，\u63d0\u4f9b\u4e86\u66f4\u76f4\u89c2\u7684\u5e03\u5c14\u7c7b\u578b\u652f\u6301\u3002<\/span><\/p>\n

              #include <stdbool.h><\/p>\n

              bool flag = true; \/\/ \u5b9a\u4e49\u5e03\u5c14\u53d8\u91cf\u5e76\u521d\u59cb\u5316\u4e3a\u771f
              \nflag = false; \/\/ \u4fee\u6539\u4e3a\u5047<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5e03\u5c14\u503c\u53ef\u4ee5\u53c2\u4e0e\u903b\u8f91\u8fd0\u7b97：<\/span><\/p>\n

              bool a = true, b = false;
              \nbool c = a && b; \/\/ \u903b\u8f91\u4e0e
              \nbool d = a || b; \/\/ \u903b\u8f91\u6216
              \nbool e = !a; \/\/ \u903b\u8f91\u975e<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362<\/span><\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5f53\u5176\u4ed6\u7c7b\u578b\u8f6c\u6362\u4e3a\u5e03\u5c14\u7c7b\u578b\u65f6，\u96f6\u503c\u8f6c\u4e3afalse，\u975e\u96f6\u503c\u8f6c\u4e3atrue：<\/span><\/p>\n

              _Bool b = 10; \/\/ b\u7684\u503c\u4e3a1（true）
              \nb = 0.0; \/\/ b\u7684\u503c\u4e3a0（false）<\/p>\n

              1.5\u3001\u5404\u79cd\u6570\u636e\u7c7b\u578b\u7684\u957f\u5ea6<\/span><\/h6>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6bcf\u4e00\u79cd\u6570\u636e\u7c7b\u578b\u90fd\u6709\u81ea\u5df1\u7684\u957f\u5ea6，\u4f7f\u7528\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b，\u80fd\u591f\u521b\u5efa\u51fa\u957f\u5ea6\u4e0d\u540c\u7684\u53d8\u91cf，\u53d8\u91cf\u957f\u5ea6\u7684\u4e0d \u540c，\u5b58\u50a8\u7684\u6570\u636e\u8303\u56f4\u5c31\u6709\u6240\u5dee\u5f02<\/span><\/p>\n

              1.5.1\u3001sizeof\u64cd\u4f5c\u7b26<\/span><\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sizeof \u662f\u2f00\u4e2a\u5173\u952e\u5b57，\u4e5f\u662f\u64cd\u4f5c\u7b26，\u4e13\u95e8\u662f\u7528\u6765\u8ba1\u7b97sizeof\u64cd\u4f5c\u7b26\u6570\u7684\u7c7b\u578b\u957f\u5ea6\u7684，\u5355\u4f4d\u662f\u5b57\u8282\u3002 sizeof \u64cd\u4f5c\u7b26\u7684\u64cd\u4f5c\u6570\u53ef\u4ee5\u662f\u7c7b\u578b，\u4e5f\u53ef\u662f\u53d8\u91cf\u6216\u8005\u8868\u8fbe\u5f0f\u3002\u5b83\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u6c42\u503c，\u8fd4\u56de\u4e00\u4e2a\u00a0size_t\u00a0\u7c7b\u578b\u7684\u65e0\u7b26\u53f7\u6574\u6570\u3002<\/span><\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u4ee5\u76f4\u63a5\u5bf9\u6570\u636e\u7c7b\u578b\u4f7f\u7528\u00a0sizeof，\u4f8b\u5982：<\/span><\/p>\n

              size_t int_size = sizeof(int); \/\/ \u8fd4\u56de int \u7c7b\u578b\u7684\u5927\u5c0f<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u4ee5\u5bf9\u53d8\u91cf\u4f7f\u7528\u00a0sizeof，\u65e0\u9700\u62ec\u53f7（\u9664\u975e\u662f\u7c7b\u578b\u540d）：<\/span><\/p>\n

              int x;
              \nsize_t x_size = sizeof x; \/\/ \u8fd4\u56de\u53d8\u91cf x \u7684\u5927\u5c0f<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5bf9\u6570\u7ec4\u4f7f\u7528\u00a0sizeof\u00a0\u4f1a\u8fd4\u56de\u6574\u4e2a\u6570\u7ec4\u7684\u5b57\u8282\u5927\u5c0f：<\/span><\/p>\n

              int arr[10];
              \nsize_t arr_size = sizeof(arr); \/\/ \u8fd4\u56de 10 * sizeof(int)<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5bf9\u6307\u9488\u4f7f\u7528\u00a0sizeof\u00a0\u8fd4\u56de\u6307\u9488\u672c\u8eab\u7684\u5927\u5c0f（\u901a\u5e38\u4e3a 4 \u6216 8 \u5b57\u8282，\u53d6\u51b3\u4e8e\u7cfb\u7edf）：<\/span><\/p>\n

              int *ptr;
              \nsize_t ptr_size = sizeof(ptr); \/\/ \u8fd4\u56de\u6307\u9488\u7684\u5927\u5c0f，\u800c\u975e\u6307\u5411\u7684\u6570\u636e\u5927\u5c0f<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sizeof\u4e2d\u8868\u8fbe\u5f0f\u4e0d\u8ba1\u7b97<\/span><\/p>\n

              #include <stdio.h>
              \nint main()
              \n{
              \nshort s = 2;
              \nint b = 10;
              \nprintf("%d\\\\n", sizeof(b = b + 1));
              \n\/\/\u8868\u8fbe\u5f0fb = b + 1\u7684\u7c7b\u578b\u4e3aint（\u56e0b\u662fint\u7c7b\u578b），\u6240\u4ee5sizeof\u8fd4\u56deint\u7684\u5b57\u8282\u6570（\u901a\u5e38\u4e3a4）
              \nprintf("s = %d\\\\n", s);
              \nreturn 0;
              \n}<\/p>\n<\/p>\n

              2. signed \u548cunsigned<\/span><\/h4>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C\u8bed\u8a00\u4f7f\u7528signed \u548c unsigned \u5173\u952e\u5b57\u4fee\u9970\u5b57\u7b26\u578b\u548c\u6574\u578b\u7c7b\u578b\u7684\u3002signed \u5173\u952e\u5b57，\u8868\u793a\u2f00\u4e2a\u7c7b\u578b\u5e26\u6709\u6b63\u8d1f\u53f7，\u5305\u542b\u8d1f\u503c； unsigned \u5173\u952e\u5b57，\u8868\u793a\u8be5\u7c7b\u578b\u4e0d\u5e26\u6709\u6b63\u8d1f\u53f7，\u53ea\u80fd\u8868\u793a\u96f6\u548c\u6b63\u6574\u6570\u3002 \u5bf9\u4e8e int \u7c7b\u578b，\u9ed8\u8ba4\u662f\u5e26\u6709\u6b63\u8d1f\u53f7\u7684，\u4e5f\u5c31\u662f\u8bf4\u7531\u4e8e\u8fd9\u662f\u9ed8\u8ba4\u60c5\u51b5，\u5173\u952e\u5b57 int \u7b49\u540c\u4e8e signed int \u3002 signed \u2f00\u822c\u90fd\u7701\u7565\u4e0d\u5199，\u4f46\u662f\u5199\u4e86\u4e5f\u4e0d\u7b97\u9519\u3002<\/span><\/p>\n

              signed int a;
              \n\/\/\u7b49\u540c\u4e8eint a; <\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u4ee5\u5c06 int \u7c7b\u578b\u58f0\u660e\u4e3a\u65e0\u7b26\u53f7\u5f62\u5f0f，\u4ec5\u8868\u793a\u975e\u8d1f\u6574\u6570，\u6b64\u65f6\u9700\u4f7f\u7528 unsigned \u5173\u952e\u5b57\u3002\u4f7f\u7528 unsigned \u58f0\u660e\u6574\u578b\u53d8\u91cf\u7684\u4f18\u52bf\u5728\u4e8e：\u76f8\u540c\u5185\u5b58\u7a7a\u95f4\u4e0b，\u53ef\u8868\u793a\u7684\u6700\u5927\u6574\u6570\u503c\u5c06\u6269\u5927\u4e00\u500d\u3002<\/span><\/p>\n<\/p>\n

              unsigned int a; <\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0unsigned int\u91cc\u9762\u7684int\u53ef\u4ee5\u7701\u7565，\u5199\u6210\u4e0b\u9762\u8fd9\u6837：<\/span><\/p>\n

              unsigned a<\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5b57\u7b26\u7c7b\u578b char \u4e5f\u53ef\u4ee5\u8bbe\u7f6e signed \u548c unsigned \u3002<\/span><\/p>\n

              signed char c;
              \n\/\/\u8303\u56f4\u4e3a-128 \u5230127
              \nunsigned char c;
              \n\/\/ \u8303\u56f4\u4e3a0\u5230255 <\/p>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9700\u8981\u6ce8\u610f\u7684\u662f，C\u8bed\u8a00\u89c4\u5b9achar\u7c7b\u578b\u9ed8\u8ba4\u662f\u5426\u5e26\u7b26\u53f7\u53d6\u51b3\u4e8e\u5f53\u524d\u7cfb\u7edf\u3002\u8fd9\u610f\u5473\u7740char\u5e76\u4e0d\u7b49\u540c\u4e8eunsigned char\u3002\u8fd9\u4e00\u70b9\u4e0eint\u4e0d\u540c，int\u9ed8\u8ba4\u7b49\u540c\u4e8esigned int\u3002<\/span><\/p>\n<\/p>\n

              3. \u6570\u636e\u7c7b\u578b\u7684\u53d6\u503c\u8303\u56f4<\/span><\/h4>\n

              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C\u8bed\u8a00\u4e2d\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u53ca\u5176\u53d6\u503c\u8303\u56f4\u4e3b\u8981\u53d6\u51b3\u4e8e\u7f16\u8bd1\u5668\u548c\u7cfb\u7edf\u67b6\u6784（\u598232\u4f4d\u621664\u4f4d）\u3002\u4ee5\u4e0b\u662f\u5e38\u89c1\u6570\u636e\u7c7b\u578b\u7684\u5178\u578b\u53d6\u503c\u8303\u56f4：<\/span><\/p>\n

              3.1\u3001\u6574\u578b<\/span><\/h6>\n
            • \n

              char<\/span><\/p>\n

                \n
              • \u5927\u5c0f：1\u5b57\u8282（8\u4f4d）<\/span><\/li>\n
              • \u6709\u7b26\u53f7：-128 \u5230 127<\/span><\/li>\n
              • \u65e0\u7b26\u53f7：0 \u5230 255<\/span><\/li>\n<\/ul>\n<\/li>\n
              • \n

                short<\/span><\/p>\n

                  \n
                • \u5927\u5c0f：2\u5b57\u8282（16\u4f4d）<\/span><\/li>\n
                • \u6709\u7b26\u53f7：-32,768 \u5230 32,767<\/span><\/li>\n
                • \u65e0\u7b26\u53f7：0 \u5230 65,535<\/span><\/li>\n<\/ul>\n<\/li>\n
                • \n

                  int<\/span><\/p>\n

                    \n
                  • \u5927\u5c0f：\u901a\u5e384\u5b57\u8282（32\u4f4d）<\/span><\/li>\n
                  • \u6709\u7b26\u53f7：-2,147,483,648 \u5230 2,147,483,647<\/span><\/li>\n
                  • \u65e0\u7b26\u53f7：0 \u5230 4,294,967,295<\/span><\/li>\n<\/ul>\n<\/li>\n
                  • \n

                    long<\/span><\/p>\n

                      \n
                    • \u5927\u5c0f：4\u5b57\u8282（32\u4f4d\u7cfb\u7edf）\u62168\u5b57\u8282（64\u4f4d\u7cfb\u7edf）<\/span><\/li>\n
                    • 32\u4f4d\u6709\u7b26\u53f7：-2,147,483,648 \u5230 2,147,483,647<\/span><\/li>\n
                    • 64\u4f4d\u6709\u7b26\u53f7：-9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807<\/span><\/li>\n
                    • \u65e0\u7b26\u53f7：0 \u5230 18,446,744,073,709,551,615（64\u4f4d）<\/span><\/li>\n<\/ul>\n<\/li>\n
                    • \n

                      long long<\/span><\/p>\n

                        \n
                      • \u5927\u5c0f：8\u5b57\u8282（64\u4f4d）<\/span><\/li>\n
                      • \u6709\u7b26\u53f7：-9,223,372,036,854,775,808 \u5230 9,223,372,036,854,775,807<\/span><\/li>\n
                      • \u65e0\u7b26\u53f7：0 \u5230 18,446,744,073,709,551,615<\/span><\/li>\n<\/ul>\n<\/li>\n
                        3.2\u3001\u6d6e\u70b9\u578b<\/span><\/h6>\n
                      • \n

                        float<\/span><\/p>\n

                          \n
                        • \u5927\u5c0f：4\u5b57\u8282（32\u4f4d）<\/span><\/li>\n
                        • \u8303\u56f4：\u7ea6 1.2E-38 \u5230 3.4E+38<\/span><\/li>\n
                        • \u7cbe\u5ea6：6-7\u4f4d\u5c0f\u6570<\/span><\/li>\n<\/ul>\n<\/li>\n
                        • \n

                          double<\/span><\/p>\n

                            \n
                          • \u5927\u5c0f：8\u5b57\u8282（64\u4f4d）<\/span><\/li>\n
                          • \u8303\u56f4：\u7ea6 2.3E-308 \u5230 1.7E+308<\/span><\/li>\n
                          • \u7cbe\u5ea6：15-16\u4f4d\u5c0f\u6570<\/span><\/li>\n<\/ul>\n<\/li>\n
                          • \n

                            long double<\/span><\/p>\n

                              \n
                            • \u5927\u5c0f：\u901a\u5e3810\u5b57\u8282（80\u4f4d）\u6216\u66f4\u9ad8<\/span><\/li>\n
                            • \u8303\u56f4：\u66f4\u5927，\u5177\u4f53\u53d6\u51b3\u4e8e\u5b9e\u73b0<\/span><\/li>\n<\/ul>\n<\/li>\n
                              3.3\u3001\u83b7\u53d6\u5177\u4f53\u503c\u7684\u4ee3\u7801\u793a\u4f8b<\/span><\/h6>\n

                              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u4ee5\u4f7f\u7528 <limits.h> \u548c <float.h> \u5934\u6587\u4ef6\u83b7\u53d6\u5177\u4f53\u7f16\u8bd1\u73af\u5883\u4e0b\u7684\u53d6\u503c\u8303\u56f4：<\/span><\/p>\n

                              #include <stdio.h>
                              \n#include <limits.h>
                              \n#include <float.h><\/p>\n

                              int main() {
                              \n printf("char range: %d to %d\\\\n", CHAR_MIN, CHAR_MAX);
                              \n printf("int range: %d to %d\\\\n", INT_MIN, INT_MAX);
                              \n printf("float range: %e to %e\\\\n", FLT_MIN, FLT_MAX);
                              \n return 0;
                              \n}<\/p>\n

                              3.4\u3001\u6ce8\u610f\u4e8b\u9879<\/span><\/h6>\n
                                \n
                              • \u5b9e\u9645\u53d6\u503c\u8303\u56f4\u53ef\u80fd\u56e0\u7f16\u8bd1\u5668\u6216\u5e73\u53f0\u4e0d\u540c\u800c\u53d8\u5316，\u5efa\u8bae\u4f7f\u7528\u6807\u51c6\u5e93\u5b8f（\u5982 INT_MAX）\u83b7\u53d6\u5177\u4f53\u503c\u3002<\/span><\/li>\n
                              • \u65e0\u7b26\u53f7\u7c7b\u578b\u7684\u6700\u5c0f\u503c\u59cb\u7ec8\u4e3a 0，\u6700\u5927\u503c\u53ef\u901a\u8fc7 UINT_MAX \u7b49\u5b8f\u83b7\u53d6\u3002<\/span><\/li>\n<\/ul>\n

                                4. \u53d8\u91cf<\/span><\/h4>\n
                                4.1\u3001\u53d8\u91cf\u7684\u521b\u5efa<\/span><\/h6>\n

                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e86\u89e3\u6e05\u695a\u4e86\u7c7b\u578b，\u6211\u4eec\u4f7f\u7528\u7c7b\u578b\u505a\u4ec0\u4e48\u5462？\u7c7b\u578b\u662f\u7528\u6765\u521b\u5efa\u53d8\u91cf\u7684\u3002\u4ec0\u4e48\u662f\u53d8\u91cf\u5462？C\u8bed\u8a00\u4e2d\u628a\u7ecf\u5e38\u53d8\u5316\u7684\u503c\u79f0\u4e3a\u53d8\u91cf，\u4e0d\u53d8\u7684\u503c\u79f0\u4e3a\u5e38\u91cf\u3002<\/span><\/p>\n

                                data_type name;
                                \n | |
                                \n | |
                                \n\u6570\u636e\u7c7b\u578b \u53d8\u91cf\u540d<\/p>\n

                                int age; \/\/\u6574\u578b\u53d8\u91cf
                                \nchar ch; \/\/\u5b57\u7b26\u53d8\u91cf
                                \ndouble weight; \/\/\u6d6e\u70b9\u578b\u53d8\u91cf<\/p>\n

                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53d8\u91cf\u5728\u521b\u5efa\u7684\u65f6\u5019\u5c31\u7ed9\u2f00\u4e2a\u521d\u59cb\u503c，\u5c31\u53eb\u521d\u59cb\u5316\u3002<\/span><\/p>\n

                                int age = 18;
                                \nchar ch = 'w';
                                \ndouble weight = 48.0;
                                \nunsigned int height = 100;<\/p>\n

                                4.2\u3001\u53d8\u91cf\u7684\u5206\u7c7b<\/span><\/h6>\n
                                  \n
                                • \n

                                  \u5168\u5c40\u53d8\u91cf：\u5b9a\u4e49\u5728\u5927\u62ec\u53f7\u5916\u7684\u53d8\u91cf\u79f0\u4e3a\u5168\u5c40\u53d8\u91cf\u3002\u5176\u4f5c\u7528\u57df\u8986\u76d6\u6574\u4e2a\u5de5\u7a0b，\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8c03\u7528\u4f7f\u7528\u3002<\/span><\/p>\n<\/li>\n

                                • \u5c40\u90e8\u53d8\u91cf：\u5b9a\u4e49\u5728\u5927\u62ec\u53f7\u5185\u7684\u53d8\u91cf\u79f0\u4e3a\u5c40\u90e8\u53d8\u91cf\u3002\u5176\u4f5c\u7528\u8303\u56f4\u4ec5\u9650\u4e8e\u5b9a\u4e49\u5b83\u7684\u4ee3\u7801\u5757\u5185\u90e8，\u65e0\u6cd5\u5728\u5916\u90e8\u4f7f\u7528\u3002<\/span><\/li>\n<\/ul>\n

                                  #include <stdio.h><\/p>\n

                                  int global = 2023;\/\/\u5168\u5c40\u53d8\u91cf
                                  \nint main()
                                  \n {
                                  \n int local = 2018;\/\/\u5c40\u90e8\u53d8\u91cf
                                  \n printf("%d\\\\n", local);
                                  \n printf("%d\\\\n", global);
                                  \n return 0;
                                  \n }<\/p>\n

                                  #include <stdio.h>
                                  \nint n = 1000;
                                  \nint main()
                                  \n{
                                  \n int n = 10;
                                  \n printf("%d\\\\n" n);\/\/\u6253\u5370\u7684\u7ed3\u679c\u662f\u591a\u5c11\u5462？
                                  \n return 0;
                                  \n}<\/p>\n

                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u5c40\u90e8\u548c\u5168\u5c40\u53d8\u91cf\u540c\u540d\u7684\u65f6\u5019，\u5c40\u90e8\u53d8\u91cf\u4f18\u5148\u4f7f\u7528\u3002<\/span><\/p>\n

                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728C\/C++\u8bed\u8a00\u4e2d，\u53d8\u91cf\u6839\u636e\u4f5c\u7528\u57df\u4e0d\u540c\u5b58\u50a8\u4e8e\u5185\u5b58\u7684\u4e0d\u540c\u533a\u57df：<\/span><\/p>\n

                                • \u5c40\u90e8\u53d8\u91cf：\u5b58\u50a8\u5728\u6808\u533a，\u51fd\u6570\u8c03\u7528\u65f6\u81ea\u52a8\u5206\u914d，\u51fd\u6570\u8fd4\u56de\u65f6\u81ea\u52a8\u91ca\u653e<\/span><\/li>\n
                                • \u5168\u5c40\u53d8\u91cf：\u5b58\u50a8\u5728\u9759\u6001\u533a，\u7a0b\u5e8f\u8fd0\u884c\u671f\u95f4\u59cb\u7ec8\u5b58\u5728<\/span><\/li>\n
                                • \u52a8\u6001\u5206\u914d\u5185\u5b58：\u4f7f\u7528\u5806\u533a\u8fdb\u884c\u7ba1\u7406，\u901a\u8fc7malloc\/new\u7533\u8bf7，free\/delete\u91ca\u653e<\/span><\/li>\n<\/p>\n

                                  \"\"<\/span><\/p>\n

                                  5. \u7b97\u672f\u64cd\u4f5c\u7b26：+\u3001-\u3001*\u3001\/\u3001%<\/span><\/h4>\n
                                  5.1\u3001\u7b97\u672f\u64cd\u4f5c\u7b26\u6982\u8ff0<\/span><\/h6>\n

                                  C\u8bed\u8a00\u63d0\u4f9b\u4e94\u79cd\u57fa\u672c\u7b97\u672f\u64cd\u4f5c\u7b26，\u7528\u4e8e\u6267\u884c\u6570\u503c\u8ba1\u7b97：<\/span><\/p>\n

                                    \n
                                  • +：\u52a0\u6cd5<\/span><\/li>\n
                                  • -：\u51cf\u6cd5<\/span><\/li>\n
                                  • *：\u4e58\u6cd5<\/span><\/li>\n
                                  • \/：\u9664\u6cd5<\/span><\/li>\n
                                  • %：\u53d6\u6a21（\u6c42\u4f59\u6570）<\/span><\/li>\n<\/ul>\n
                                    5.2\u3001\u52a0\u6cd5\u64cd\u4f5c\u7b26 +<\/span><\/h6>\n

                                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u64cd\u4f5c\u6570\u7684\u548c\u3002<\/span><\/p>\n

                                    int result = 5 + 3; \/\/ result = 8<\/p>\n

                                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u652f\u6301\u6574\u6570\u548c\u6d6e\u70b9\u6570\u8fd0\u7b97，\u7ed3\u679c\u4e3a\u64cd\u4f5c\u6570\u7c7b\u578b\u3002<\/span><\/p>\n

                                    5.3\u3001\u51cf\u6cd5\u64cd\u4f5c\u7b26 –<\/span><\/h6>\n

                                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u64cd\u4f5c\u6570\u7684\u5dee，\u6216\u8868\u793a\u8d1f\u6570\u3002<\/span><\/p>\n

                                    int diff = 10 – 4; \/\/ diff = 6
                                    \nint neg = -5; \/\/ neg = -5<\/p>\n

                                    5.4\u3001\u4e58\u6cd5\u64cd\u4f5c\u7b26 *<\/span><\/h6>\n

                                    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u64cd\u4f5c\u6570\u7684\u4e58\u79ef\u3002<\/span><\/p>\n

                                    int product = 6 * 7; \/\/ product = 42<\/p>\n

                                    5.5\u3001\u9664\u6cd5\u64cd\u4f5c\u7b26 \/<\/span><\/h6>\n

                                    \u00a0\u6267\u884c\u9664\u6cd5\u8fd0\u7b97，\u7ed3\u679c\u53d6\u51b3\u4e8e\u64cd\u4f5c\u6570\u7c7b\u578b：<\/span><\/p>\n

                                      \n
                                    • \u6574\u6570\u9664\u6cd5：\u622a\u65ad\u5c0f\u6570\u90e8\u5206（\u5411\u96f6\u53d6\u6574）\u3002<\/span><\/li>\n
                                    • \u6d6e\u70b9\u6570\u9664\u6cd5：\u4fdd\u7559\u5c0f\u6570\u90e8\u5206\u3002<\/span><\/li>\n<\/ul>\n

                                      int div_int = 10 \/ 3; \/\/ div_int = 3
                                      \nfloat div_float = 10.0 \/ 3.0; \/\/ div_float \u2248 3.333…<\/p>\n

                                      5.6\u3001\u53d6\u6a21\u64cd\u4f5c\u7b26 %<\/span><\/h6>\n

                                      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd4\u56de\u6574\u6570\u9664\u6cd5\u7684\u4f59\u6570，\u4ec5\u9002\u7528\u4e8e\u6574\u6570\u7c7b\u578b\u3002<\/span><\/p>\n

                                      int remainder = 10 % 3; \/\/ remainder = 1<\/p>\n

                                      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u82e5\u64cd\u4f5c\u6570\u4e3a\u8d1f\u6570，\u7ed3\u679c\u7b26\u53f7\u4f9d\u8d56\u7f16\u8bd1\u5668\u5b9e\u73b0（\u901a\u5e38\u4e0e\u88ab\u9664\u6570\u4e00\u81f4）\u3002<\/span><\/p>\n

                                      5.7\u3001\u4f18\u5148\u7ea7\u4e0e\u7ed3\u5408\u6027<\/span><\/h6>\n

                                      \u7b97\u672f\u64cd\u4f5c\u7b26\u7684\u4f18\u5148\u7ea7\u4ece\u9ad8\u5230\u4f4e：<\/span><\/p>\n

                                    • *\u3001\/\u3001%（\u540c\u7ea7，\u5de6\u7ed3\u5408）<\/span><\/li>\n
                                    • +\u3001-（\u540c\u7ea7，\u5de6\u7ed3\u5408）<\/span><\/li>\n

                                      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f7f\u7528\u62ec\u53f7\u53ef\u663e\u5f0f\u63a7\u5236\u8fd0\u7b97\u987a\u5e8f：<\/span><\/p>\n

                                      int value = (2 + 3) * 4; \/\/ value = 20<\/p>\n

                                      5.8\u3001\u6ce8\u610f\u4e8b\u9879<\/span><\/h6>\n
                                        \n
                                      • \u6574\u6570\u9664\u4ee5\u96f6\u5bfc\u81f4\u8fd0\u884c\u65f6\u9519\u8bef\u3002<\/span><\/li>\n
                                      • \u6d6e\u70b9\u6570\u9664\u4ee5\u96f6\u53ef\u80fd\u8fd4\u56de INF（\u65e0\u7a77\u5927）\u6216 NaN（\u975e\u6570\u5b57）\u3002<\/span><\/li>\n
                                      • \u53d6\u6a21\u64cd\u4f5c\u7b26\u4e0d\u53ef\u7528\u4e8e\u6d6e\u70b9\u6570\u3002<\/span><\/li>\n<\/ul>\n

                                        6. \u8d4b\u503c\u64cd\u4f5c\u7b26：=\u548c\u590d\u5408\u8d4b\u503c<\/span><\/h4>\n
                                        6.1\u3001\u57fa\u7840\u8d4b\u503c\u64cd\u4f5c\u7b26（=）<\/span><\/h6>\n

                                        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728 C \u8bed\u8a00\u4e2d，= \u662f\u57fa\u7840\u7684\u8d4b\u503c\u64cd\u4f5c\u7b26，\u7528\u4e8e\u5c06\u53f3\u4fa7\u8868\u8fbe\u5f0f\u7684\u503c\u8d4b\u7ed9\u5de6\u4fa7\u7684\u53d8\u91cf\u3002\u8bed\u6cd5\u5f62\u5f0f\u4e3a：<\/span><\/p>\n

                                        variable = expression;<\/p>\n

                                        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8d4b\u503c\u64cd\u4f5c\u7b26\u7684\u4f18\u5148\u7ea7\u8f83\u4f4e，\u901a\u5e38\u7ed3\u5408\u65b9\u5411\u4e3a\u4ece\u53f3\u5411\u5de6\u3002\u4f8b\u5982：<\/span><\/p>\n

                                        int a, b;
                                        \na = 5; \/\/ \u5c06 5 \u8d4b\u7ed9\u53d8\u91cf a
                                        \nb = a + 3; \/\/ \u8ba1\u7b97 a + 3 \u5e76\u5c06\u7ed3\u679c\u8d4b\u7ed9 b<\/p>\n

                                        6.2\u3001\u590d\u5408\u8d4b\u503c\u64cd\u4f5c\u7b26<\/span><\/h6>\n

                                        \u590d\u5408\u8d4b\u503c\u64cd\u4f5c\u7b26\u7ed3\u5408\u4e86\u8d4b\u503c\u4e0e\u7b97\u672f\/\u4f4d\u8fd0\u7b97，\u7b80\u5316\u4ee3\u7801\u5e76\u63d0\u5347\u53ef\u8bfb\u6027\u3002\u5e38\u89c1\u5f62\u5f0f\u5305\u62ec：<\/span><\/p>\n

                                          \n
                                        • +=（\u52a0\u6cd5\u8d4b\u503c）<\/span><\/li>\n
                                        • -=（\u51cf\u6cd5\u8d4b\u503c）<\/span><\/li>\n
                                        • *=（\u4e58\u6cd5\u8d4b\u503c）<\/span><\/li>\n
                                        • \/=（\u9664\u6cd5\u8d4b\u503c）<\/span><\/li>\n
                                        • %=（\u53d6\u6a21\u8d4b\u503c）<\/span><\/li>\n<\/ul>\n

                                          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8bed\u6cd5\u5f62\u5f0f\u4e3a：<\/span><\/p>\n

                                          variable op= expression;
                                          \n\/\/ \u7b49\u4ef7\u4e8e variable = variable op (expression)<\/p>\n

                                          \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u793a\u4f8b：<\/span><\/p>\n

                                          int x = 10;
                                          \nx += 5; \/\/ x = x + 5 \u2192 15
                                          \nx *= 2; \/\/ x = x * 2 \u2192 30<\/p>\n

                                          6.3\u3001\u6ce8\u610f\u4e8b\u9879<\/span><\/h6>\n
                                            \n
                                          • \u53f3\u7ed3\u5408\u6027：\u590d\u5408\u8d4b\u503c\u64cd\u4f5c\u7b26\u4ece\u53f3\u5411\u5de6\u8ba1\u7b97\u3002\u4f8b\u5982 a += b *= 2 \u7b49\u4ef7\u4e8e a += (b *= 2)\u3002<\/span><\/li>\n
                                          • \u8868\u8fbe\u5f0f\u6c42\u503c\u987a\u5e8f：\u53f3\u4fa7\u8868\u8fbe\u5f0f\u4f1a\u5148\u8ba1\u7b97，\u518d\u4e0e\u5de6\u4fa7\u53d8\u91cf\u8fd0\u7b97\u3002<\/span><\/li>\n
                                          • \u7c7b\u578b\u5339\u914d：\u9700\u786e\u4fdd\u5de6\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b\u517c\u5bb9，\u5426\u5219\u53ef\u80fd\u89e6\u53d1\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u6216\u8b66\u544a\u3002<\/span><\/li>\n<\/ul>\n

                                            7. \u5355\u76ee\u64cd\u4f5c\u7b26：++\u3001–\u3001+\u3001<\/span><\/h4>\n
                                            7.1\u3001\u81ea\u589e\u64cd\u4f5c\u7b26 ++<\/span><\/h6>\n

                                            \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u5c06\u64cd\u4f5c\u6570\u7684\u503c\u589e\u52a01，\u5206\u4e3a\u524d\u7f00（++a）\u548c\u540e\u7f00（a++）\u4e24\u79cd\u5f62\u5f0f\u3002<\/span><\/p>\n

                                              \n
                                            • \n

                                              \u524d\u7f00\u5f62\u5f0f：\u5148\u81ea\u589e，\u518d\u4f7f\u7528\u53d8\u91cf\u7684\u503c\u3002\u8ba1\u7b97\u53e3\u8bc0：\u5148+1，\u540e\u4f7f\u7528；<\/span><\/p>\n

                                              int a = 5;
                                              \nint b = ++a; \/\/ a\u5148\u53d8\u4e3a6，\u518d\u8d4b\u503c\u7ed9b
                                              \nprintf("%d, %d", a, b); \/\/ \u8f93\u51fa: 6, 6<\/p>\n<\/li>\n

                                            • \n

                                              \u540e\u7f00\u5f62\u5f0f：\u5148\u4f7f\u7528\u53d8\u91cf\u7684\u503c，\u518d\u81ea\u589e\u3002\u8ba1\u7b97\u53e3\u8bc0：\u5148\u4f7f\u7528，\u540e+1<\/span><\/p>\n

                                              int a = 5;
                                              \nint b = a++; \/\/ b\u8d4b\u503c\u4e3a5，a\u968f\u540e\u53d8\u4e3a6
                                              \nprintf("%d, %d", a, b); \/\/ \u8f93\u51fa: 6, 5<\/p>\n<\/li>\n<\/ul>\n

                                              7.2\u3001\u81ea\u51cf\u64cd\u4f5c\u7b26 —<\/span><\/h6>\n

                                              \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u5c06\u64cd\u4f5c\u6570\u7684\u503c\u51cf\u5c111，\u540c\u6837\u5206\u4e3a\u524d\u7f00（–a）\u548c\u540e\u7f00（a–）\u3002<\/span><\/p>\n

                                                \n
                                              • \n

                                                \u524d\u7f00\u5f62\u5f0f：\u5148\u81ea\u51cf，\u518d\u4f7f\u7528\u53d8\u91cf\u3002\u8ba1\u7b97\u53e3\u8bc0：\u5148-1，\u540e\u4f7f\u7528\u3002<\/span><\/p>\n

                                                int a = 5;
                                                \nint b = –a; \/\/ a\u53d8\u4e3a4，b\u8d4b\u503c\u4e3a4<\/p>\n<\/li>\n

                                              • \n

                                                \u540e\u7f00\u5f62\u5f0f：\u5148\u4f7f\u7528\u53d8\u91cf，\u518d\u81ea\u51cf\u3002\u8ba1\u7b97\u53e3\u8bc0：\u5148\u4f7f\u7528，\u540e-1<\/span><\/p>\n

                                                int a = 5;
                                                \nint b = a–; \/\/ b\u8d4b\u503c\u4e3a5，a\u53d8\u4e3a4<\/p>\n<\/li>\n<\/ul>\n

                                                7.3\u3001\u6b63\u53f7\u64cd\u4f5c\u7b26 +<\/span><\/h6>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8868\u793a\u6570\u503c\u7684\u6b63\u503c（\u901a\u5e38\u7701\u7565），\u4f46\u53ef\u7528\u4e8e\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u6216\u660e\u786e\u8868\u8fbe\u5f0f\u8bed\u4e49\u3002<\/span><\/p>\n

                                                int a = -10;
                                                \nint b = +a; \/\/ b\u4e3a-10（\u65e0\u5b9e\u9645\u53d8\u5316）<\/p>\n

                                                7.4\u3001\u8d1f\u53f7\u64cd\u4f5c\u7b26 –<\/span><\/h6>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5bf9\u64cd\u4f5c\u6570\u53d6\u8d1f\u503c\u3002<\/span><\/p>\n

                                                int a = 10;
                                                \nint b = -a; \/\/ b\u4e3a-10<\/p>\n

                                                7.5\u3001\u6ce8\u610f\u4e8b\u9879<\/span><\/h6>\n
                                              • \n

                                                \u526f\u4f5c\u7528：++\u548c–\u4f1a\u4fee\u6539\u64cd\u4f5c\u6570\u7684\u503c，\u907f\u514d\u5728\u540c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u4e2d\u591a\u6b21\u4f7f\u7528\u540c\u4e00\u53d8\u91cf\u7684\u81ea\u589e\/\u81ea\u51cf\u3002<\/span><\/p>\n

                                                int a = 5;
                                                \nint b = a++ + a++; \/\/ \u672a\u5b9a\u4e49\u884c\u4e3a<\/p>\n<\/li>\n

                                              • \n

                                                \u7c7b\u578b\u9650\u5236：++\u548c–\u4ec5\u9002\u7528\u4e8e\u53d8\u91cf，\u4e0d\u80fd\u7528\u4e8e\u5e38\u91cf\u6216\u8868\u8fbe\u5f0f（\u59825++\u975e\u6cd5）\u3002<\/span><\/p>\n<\/li>\n

                                              • \n

                                                \u7ed3\u5408\u6027：\u5355\u76ee\u64cd\u4f5c\u7b26\u4ece\u53f3\u5411\u5de6\u7ed3\u5408\u3002\u4f8b\u5982，-+-a\u7b49\u4ef7\u4e8e- (+ (-a))\u3002<\/span><\/p>\n<\/li>\n

                                                8. \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362<\/span><\/h4>\n

                                                int a = 3.14;\/\/a\u7684\u662fint\u7c7b\u578b, 3.14\u662fdouble\u7c7b\u578b，\u4e24\u8fb9\u7684\u7c7b\u578b\u4e0d\u2f00\u81f4，\u7f16\u8bd1\u5668\u4f1a\u62a5\u8b66\u544a <\/p>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e3a\u4e86\u6d88\u9664\u8fd9\u4e2a\u8b66\u544a，\u6211\u4eec\u53ef\u4ee5\u4f7f\u2f64\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362：<\/span><\/p>\n

                                                int a = (int)3.14;\/\/\u610f\u601d\u662f\u5c063.14\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u4e3aint\u7c7b\u578b，\u8fd9\u79cd\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u53ea\u53d6\u6574\u6570\u90e8\u5206<\/p>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u4f7f\u7528\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u90fd\u662f\u4e07\u4e0d\u5f97\u5df2\u7684\u65f6\u5019\u4f7f\u7528，\u5982\u679c\u4e0d\u9700\u8981\u5f3a\u5236\u7c7b\u578b\u8f6c\u5316 \u5c31\u80fd\u5b9e\u73b0\u4ee3\u7801，\u8fd9\u6837\u81ea\u7136\u66f4\u597d\u7684<\/span><\/p>\n

                                                9. scanf\u548cprintf\u4ecb\u7ecd<\/span><\/h4>\n
                                                9.1\u3001printf<\/span><\/h6>\n
                                                \u00a0 \u00a0 \u00a0 \u00a0 9.1.1\u3001\u57fa\u672c\u7528\u6cd5：<\/span><\/h6>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf\u662fC\u8bed\u8a00\u6807\u51c6\u5e93\u4e2d\u7684\u8f93\u51fa\u51fd\u6570，\u7528\u4e8e\u5411\u6807\u51c6\u8f93\u51fa（\u5982\u5c4f\u5e55）\u6253\u5370\u683c\u5f0f\u5316\u6570\u636e\u3002\u5b83\u540d\u5b57\u91cc\u7684f\u4ee3\u8868format（\u683c\u5f0f\u5316），\u8868\u793a\u53ef\u4ee5\u5b9a\u5236\u8f93\u51fa\u6587\u672c\u7684\u683c\u5f0f\u3002<\/span><\/p>\n

                                                #include <stdio.h>
                                                \n int main()
                                                \n{
                                                \n printf("Hello World");
                                                \n return 0;
                                                \n }<\/p>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf() \u662f\u5728\u6807\u51c6\u5e93\u7684\u5934\u2f42\u4ef6 stdio.h \u5b9a\u4e49\u7684\u3002\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\u4e4b\u524d，\u5fc5\u987b\u5728\u6e90\u7801\u6587\u4ef6\u5934\u90e8\u5f15\u5165\u8fd9 \u4e2a\u5934\u6587\u4ef6\u3002<\/span><\/p>\n

                                                \u00a0 \u00a0 \u00a0 \u00a0 9.1.2\u3001\u5360\u4f4d\u7b26<\/span><\/h6>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6240\u8c13\u201c\u5360\u4f4d\u7b26\u201d，\u5c31\u662f\u8fd9\u4e2a\u4f4d\u7f6e\u53ef\u4ee5\u2f64\u5176\u4ed6\u503c\u4ee3\u5165\u3002\u00a0 \u00a0\u00a0<\/span><\/p>\n

                                                #include <stdio.h>
                                                \nint main()
                                                \n{
                                                \n printf("There are %d apples\\\\n", 3);
                                                \n return 0;
                                                \n}<\/p>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d，"There are %d apples\\\\n"\u662f\u8f93\u51fa\u6587\u672c，\u5176\u4e2d\u7684%d\u4f5c\u4e3a\u5360\u4f4d\u7b26，\u8868\u793a\u8be5\u4f4d\u7f6e\u5c06\u88ab\u5176\u4ed6\u503c\u66ff\u6362\u3002\u5360\u4f4d\u7b26\u7684\u9996\u5b57\u7b26\u59cb\u7ec8\u4e3a\u767e\u5206\u53f7%，\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u5219\u4ee3\u8868\u5360\u4f4d\u7b26\u7684\u7c7b\u578b\u3002\u4f8b\u5982%d\u8868\u793a\u6b64\u5904\u5fc5\u987b\u586b\u5165\u4e00\u4e2a\u6574\u6570\u503c\u3002<\/span><\/p>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5e38\u7528\u7684\u5360\u4f4d\u7b26\u9664\u4e86%d\u4e4b\u5916，\u8fd8\u6709%s\u7528\u4e8e\u8868\u793a\u5b57\u7b26\u4e32\u7684\u63d2\u5165\u3002<\/span><\/p>\n

                                                #include <stdio.h>
                                                \n int main()
                                                \n {
                                                \n printf("%s will come tonight\\\\n", "zhangsan");
                                                \n return 0
                                                \n}<\/p>\n

                                                \u00a0 \u00a0 \u00a0 \u00a0 9.1.3\u3001\u5360\u4f4d\u7b26\u5217\u4e3e<\/span><\/h6>\n

                                                \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ee5\u4e0b\u6309\u5b57\u6bcd\u987a\u5e8f\u5217\u51fa C \u8bed\u8a00\u4e2d\u5e38\u7528\u7684 printf() \u5360\u4f4d\u7b26，\u6bcf\u79cd\u5360\u4f4d\u7b26\u5bf9\u5e94\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b：<\/span><\/p>\n

                                                  \n
                                                • %a：\u5341\u516d\u8fdb\u5236\u6d6e\u70b9\u6570（\u5b57\u6bcd\u5c0f\u5199）<\/span><\/li>\n
                                                • %A：\u5341\u516d\u8fdb\u5236\u6d6e\u70b9\u6570（\u5b57\u6bcd\u5927\u5199）<\/span><\/li>\n
                                                • %c：\u5b57\u7b26<\/span><\/li>\n
                                                • %d：\u5341\u8fdb\u5236\u6574\u6570<\/span><\/li>\n
                                                • %e：\u79d1\u5b66\u8ba1\u6570\u6cd5\u6d6e\u70b9\u6570（\u6307\u6570\u90e8\u5206\u5c0f\u5199 e）<\/span><\/li>\n
                                                • %E：\u79d1\u5b66\u8ba1\u6570\u6cd5\u6d6e\u70b9\u6570（\u6307\u6570\u90e8\u5206\u5927\u5199 E）<\/span><\/li>\n
                                                • %f：\u5c0f\u6570（\u5305\u542b float \u548c double \u7c7b\u578b）<\/span><\/li>\n
                                                • %g：6 \u4f4d\u6709\u6548\u6570\u5b57\u6d6e\u70b9\u6570（\u81ea\u52a8\u8f6c\u4e3a\u79d1\u5b66\u8ba1\u6570\u6cd5\u65f6\u6307\u6570\u90e8\u5206\u5c0f\u5199 e）<\/span><\/li>\n
                                                • %G：\u540c %g（\u6307\u6570\u90e8\u5206\u5927\u5199 E）<\/span><\/li>\n
                                                • %hd：\u5341\u8fdb\u5236 short int \u7c7b\u578b<\/span><\/li>\n
                                                • %ho：\u516b\u8fdb\u5236 short int \u7c7b\u578b<\/span><\/li>\n
                                                • %hx：\u5341\u516d\u8fdb\u5236 short int \u7c7b\u578b<\/span><\/li>\n
                                                • %hu：unsigned short int \u7c7b\u578b<\/span><\/li>\n
                                                • %i：\u6574\u6570（\u57fa\u672c\u7b49\u540c\u4e8e %d）<\/span><\/li>\n
                                                • %ld：\u5341\u8fdb\u5236 long int \u7c7b\u578b<\/span><\/li>\n
                                                • %lo：\u516b\u8fdb\u5236 long int \u7c7b\u578b<\/span><\/li>\n
                                                • %lx：\u5341\u516d\u8fdb\u5236 long int \u7c7b\u578b<\/span><\/li>\n
                                                • %lu：unsigned long int \u7c7b\u578b<\/span><\/li>\n
                                                • %lld：\u5341\u8fdb\u5236 long long int \u7c7b\u578b<\/span><\/li>\n
                                                • %llo：\u516b\u8fdb\u5236 long long int \u7c7b\u578b<\/span><\/li>\n
                                                • %llx：\u5341\u516d\u8fdb\u5236 long long int \u7c7b\u578b<\/span><\/li>\n
                                                • %llu：unsigned long long int \u7c7b\u578b<\/span><\/li>\n
                                                • %Le：\u79d1\u5b66\u8ba1\u6570\u6cd5\u8868\u793a\u7684 long double \u7c7b\u578b\u6d6e\u70b9\u6570<\/span><\/li>\n
                                                • %Lf：long double \u7c7b\u578b\u6d6e\u70b9\u6570<\/span><\/li>\n
                                                • %n：\u8bb0\u5f55\u5df2\u8f93\u51fa\u7684\u5b57\u7b26\u6570\u91cf（\u4e0d\u663e\u793a，\u4ec5\u5b58\u50a8\u5230\u53d8\u91cf）<\/span><\/li>\n
                                                • %o：\u516b\u8fdb\u5236\u6574\u6570<\/span><\/li>\n
                                                • %p：\u6307\u9488<\/span><\/li>\n
                                                • %s：\u5b57\u7b26\u4e32<\/span><\/li>\n
                                                • %u：unsigned int \u7c7b\u578b<\/span><\/li>\n
                                                • %x：\u5341\u516d\u8fdb\u5236\u6574\u6570<\/span><\/li>\n
                                                • %zd：size_t \u7c7b\u578b<\/span><\/li>\n
                                                • %%：\u8f93\u51fa\u767e\u5206\u53f7（%）<\/span><\/li>\n<\/ul>\n
                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a09.1.4\u3001\u9650\u5b9a\u5360\u4f4d\u7b26\u5bbd\u5ea6<\/span><\/h6>\n

                                                  int num = 42;
                                                  \nprintf("%5d", num); \/\/ \u8f93\u51fa " 42"（\u53f3\u5bf9\u9f50，\u5bbd\u5ea65）
                                                  \nprintf("%-5d", num); \/\/ \u8f93\u51fa "42 "（\u5de6\u5bf9\u9f50，\u5bbd\u5ea65）<\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d，%5d\u8868\u793a\u8be5\u5360\u4f4d\u7b26\u7684\u5bbd\u5ea6\u81f3\u5c11\u4e3a5\u4e2a\u5b57\u7b26\u3002\u5982\u679c\u6570\u503c\u4e0d\u8db35\u4f4d，\u7cfb\u7edf\u4f1a\u5728\u503c\u7684\u524d\u9762\u6dfb\u52a0\u7a7a\u683c\u8fdb\u884c\u586b\u5145\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b，\u8f93\u51fa\u5185\u5bb9\u91c7\u7528\u53f3\u5bf9\u9f50\u65b9\u5f0f，\u56e0\u6b64\u4f1a\u5728\u6570\u5b57\u524d\u6dfb\u52a0\u7a7a\u683c；\u5982\u9700\u6539\u4e3a\u5de6\u5bf9\u9f50（\u5728\u6570\u5b57\u540e\u6dfb\u52a0\u7a7a\u683c），\u53ea\u9700\u5728\u5360\u4f4d\u7b26\u7684%\u540e\u6dfb\u52a0-\u7b26\u53f7\u5373\u53ef\u3002<\/span><\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5c0f\u6570\u90e8\u5206\u7684\u9650\u5b9a\u7b26\u7528\u4e8e\u63a7\u5236\u6240\u6709\u6570\u5b57\u7684\u6700\u5c0f\u663e\u793a\u5bbd\u5ea6\u3002<\/span><\/p>\n

                                                  \/\/ \u8f93\u51fa " 123.450000"
                                                  \n#include <stdio.h>
                                                  \nint main()
                                                  \n{
                                                  \n printf("%12f\\\\n", 123.45);
                                                  \n return 0;
                                                  \n}<\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d，%12f\u8868\u793a\u8f93\u51fa\u7684\u6d6e\u70b9\u6570\u81f3\u5c11\u5360\u636e12\u4f4d\u5bbd\u5ea6\u3002\u7531\u4e8e\u9ed8\u8ba4\u663e\u793a\u7cbe\u5ea6\u4e3a\u5c0f\u6570\u70b9\u540e6\u4f4d，\u56e0\u6b64\u8f93\u51fa23.45\u65f6，\u7ed3\u679c\u524d\u4f1a\u6dfb\u52a02\u4e2a\u7a7a\u683c\u3002<\/span><\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a09.1.5\u3001\u603b\u662f\u663e\u793a\u6b63\u8d1f\u53f7<\/span><\/h6>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9ed8\u8ba4\u60c5\u51b5\u4e0b， printf() \u4e0d\u5bf9\u6b63\u6570\u663e\u2f70 + \u53f7，\u53ea\u5bf9\u8d1f\u6570\u663e\u793a\u53f7\u3002\u5982\u679c\u60f3\u8ba9\u6b63\u6570\u4e5f\u8f93\u51fa + \u53f7，\u53ef \u4ee5\u5728\u5360\u4f4d\u7b26\u7684 % \u540e\u2faf\u52a0\u2f00\u4e2a + \u3002<\/span><\/p>\n

                                                  #include <stdio.h>
                                                  \nint main()
                                                  \n{
                                                  \n printf("%+d\\\\n", 12); \/\/ \u8f93\u51fa +12
                                                  \n printf("%+d\\\\n", -12); \/\/ \u8f93\u51fa -12
                                                  \n return 0;
                                                  \n}<\/p>\n

                                                  \u00a0 \u00a0 \u00a0 \u00a0 9.1.6\u3001\u9650\u5b9a\u5c0f\u6570\u4f4d\u6570<\/span><\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u9700\u63a7\u5236\u5c0f\u6570\u4f4d\u6570，\u53ef\u901a\u8fc7\u683c\u5f0f\u5316\u5360\u4f4d\u7b26\u5b9e\u73b0\u3002\u4f8b\u5982，\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u53ef\u4f7f\u7528"%.2f"\u683c\u5f0f\u3002<\/span><\/p>\n

                                                  \/\/ \u8f93\u51faNumber is 0.50
                                                  \n#include <stdio.h>
                                                  \nint main()
                                                  \n{
                                                  \n printf("Number is %.2f\\\\n", 0.5);
                                                  \n return 0;
                                                  \n}<\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fd9\u79cd\u5199\u6cd5\u53ef\u4ee5\u4e0e\u9650\u5b9a\u5bbd\u5ea6\u5360\u4f4d\u7b26，\u7ed3\u5408\u4f7f\u7528\u3002<\/span><\/p>\n

                                                  \/\/ \u8f93\u51fa\u4e3a" 0.50"
                                                  \n#include <stdio.h>
                                                  \nint main()
                                                  \n{
                                                  \n printf("%6.2f\\\\n", 0.5);
                                                  \n return 0;
                                                  \n}<\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6700\u5c0f\u5bbd\u5ea6\u548c\u5c0f\u6570\u4f4d\u6570\u8fd9\u4e24\u4e2a\u53c2\u6570，\u90fd\u53ef\u4ee5\u4f7f\u7528*\u6765\u6307\u5b9a，\u5e76\u901a\u8fc7printf()\u51fd\u6570\u8fdb\u884c\u52a8\u6001\u4f20\u5165\u3002<\/span><\/p>\n

                                                  #include <stdio.h>
                                                  \nint main()
                                                  \n{
                                                  \n printf("%*.*f\\\\n", 6, 2, 0.5);
                                                  \n return 0;
                                                  \n}
                                                  \n\/\/\u7b49\u540c\u4e8eprintf("%6.2f\\\\n", 0.5); <\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a09.1.6\u3001\u8f93\u51fa\u90e8\u5206\u5b57\u7b26\u4e32<\/span><\/h6>\n

                                                  \u00a0 \u00a0%s \u5360\u4f4d\u7b26\u7528\u4e8e\u8f93\u51fa\u5b57\u7b26\u4e32，\u9ed8\u8ba4\u4f1a\u663e\u793a\u5b8c\u6574\u5185\u5bb9\u3002\u82e5\u53ea\u9700\u663e\u793a\u5f00\u5934\u90e8\u5206，\u53ef\u4f7f\u7528%.[m]s\u683c\u5f0f，\u5176\u4e2d m \u4ee3\u8868\u8981\u663e\u793a\u7684\u5b57\u7b26\u6570\u3002<\/span><\/p>\n

                                                  \/\/ \u8f93\u51fahello
                                                  \n#include <stdio.h>
                                                  \nint main()
                                                  \n{
                                                  \n printf("%.5s\\\\n", "hello world");
                                                  \n return 0;
                                                  \n}<\/p>\n

                                                  9.2\u3001scanf<\/span><\/h6>\n
                                                  9.2.1\u3001scanf \u57fa\u672c\u7528\u6cd5<\/span><\/h6>\n

                                                  scanf \u662f C \u8bed\u8a00\u4e2d\u7528\u4e8e\u4ece\u6807\u51c6\u8f93\u5165（\u5982\u952e\u76d8）\u8bfb\u53d6\u6570\u636e\u7684\u51fd\u6570，\u5176\u57fa\u672c\u8bed\u6cd5\u4e3a：<\/span><\/p>\n

                                                  scanf("%d", &i);<\/p>\n

                                                  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5b83\u7684\u7b2c\u2f00\u4e2a\u53c2\u6570\u662f\u2f00\u4e2a\u683c\u5f0f\u5b57\u7b26\u4e32，\u91cc\u9762\u4f1a\u653e\u7f6e\u5360\u4f4d\u7b26（\u4e0e\u7f16\u8bd1\u5668\u5982\u4f55\u89e3\u8bfb\u7528\u6237\u7684\u8f93\u5165，\u9700\u8981\u63d0\u53d6\u7684\u6570\u636e\u662f\u4ec0\u4e48\u7c7b\u578b\u3002 \u8fd9\u662f\u56e0\u4e3aC\u8bed\u8a00\u7684\u6570\u636e\u90fd\u662f\u6709\u7c7b\u578b\u7684，（\u4e0eprintf() \u7684\u5360\u4f4d\u7b26\u57fa\u672c\u4e00\u81f4），scanf() \u5fc5\u987b\u63d0\u524d\u77e5\u9053\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u7c7b\u578b，\u624d\u80fd\u5904\u7406\u6570\u636e\u3002 \u5b83\u7684\u5176\u4f59\u53c2\u6570\u5c31\u662f\u5b58\u653e\u7528\u6237\u8f93\u5165\u7684\u53d8\u91cf，\u683c\u5f0f\u5b57\u7b26\u4e32\u91cc\u9762\u6709\u591a\u5c11\u4e2a\u5360\u4f4d\u7b26，\u5c31\u6709\u591a\u5c11\u4e2a\u53d8\u91cf\u3002 \u4e0a\u9762\u793a\u4f8b\u4e2d， scanf() \u7684\u7b2c\u4e00\u4e2a\u53c2\u6570 %d ，\u8868\u793a\u7528\u6237\u8f93\u5165\u7684\u5e94\u8be5\u662f\u4e00\u4e2a\u6574\u6570\u3002 %d \u5c31\u662f\u2f00\u4e2a\u5360\u4f4d \u7b26， % \u662f\u5360\u4f4d\u7b26\u7684\u6807\u5fd7， d \u8868\u793a\u6574\u6570\u3002\u7b2c\u2f06\u4e2a\u53c2\u6570 &i \u8868\u793a，\u5c06\u7528\u6237\u4ece\u952e\u76d8\u8f93\u5165\u7684\u6574\u6570\u5b58\u5165\u53d8\u91cf i \u3002<\/span><\/p>\n

                                                  \u793a\u4f8b：<\/span><\/p>\n

                                                  int num;
                                                  \nscanf("%d", &num); \/\/ \u8bfb\u53d6\u4e00\u4e2a\u6574\u6570\u5e76\u5b58\u5165 num<\/p>\n

                                                  \n
                                                  9.2.2\u3001scanf \u8fd4\u56de\u503c<\/span><\/h6>\n

                                                  scanf \u8fd4\u56de\u6210\u529f\u5339\u914d\u5e76\u8d4b\u503c\u7684\u8f93\u5165\u9879\u6570\u91cf\u3002\u82e5\u8f93\u5165\u4e0e\u683c\u5f0f\u4e0d\u5339\u914d\u6216\u9047\u5230\u6587\u4ef6\u7ed3\u675f\u7b26（\u5982 Ctrl+D\/Ctrl+Z），\u8fd4\u56de EOF（\u901a\u5e38\u4e3a -1）\u3002<\/span><\/p>\n

                                                  \u793a\u4f8b：<\/span><\/p>\n

                                                  int a, b;
                                                  \nint count = scanf("%d %d", &a, &b);
                                                  \n\/\/ \u82e5\u8f93\u5165 "10 20"，count \u4e3a 2；\u82e5\u8f93\u5165 "10 abc"，count \u4e3a 1\u3002<\/p>\n

                                                  \n
                                                  9.2.3\u3001\u5e38\u7528\u5360\u4f4d\u7b26<\/span><\/h6>\n

                                                  scanf \u7684\u5360\u4f4d\u7b26\u9700\u4e0e\u53d8\u91cf\u7c7b\u578b\u4e25\u683c\u5339\u914d：<\/span><\/p>\n\n\u5360\u4f4d\u7b26<\/span>\u7c7b\u578b<\/span>\u793a\u4f8b<\/span><\/tr>\n\n\n\n\n\n\n\n\n
                                                  %d<\/span><\/td>\nint<\/span><\/td>\nscanf("%d", &x);<\/span><\/td>\n<\/tr>\n
                                                  %f<\/span><\/td>\nfloat<\/span><\/td>\nscanf("%f", &y);<\/span><\/td>\n<\/tr>\n
                                                  %lf<\/span><\/td>\ndouble<\/span><\/td>\nscanf("%lf", &z);<\/span><\/td>\n<\/tr>\n
                                                  %c<\/span><\/td>\nchar<\/span><\/td>\nscanf("%c", &c);<\/span><\/td>\n<\/tr>\n
                                                  %s<\/span><\/td>\n\u5b57\u7b26\u4e32（char[]）<\/span><\/td>\nscanf("%s", str);<\/span><\/td>\n<\/tr>\n
                                                  %u<\/span><\/td>\nunsigned int<\/span><\/td>\nscanf("%u", &u);<\/span><\/td>\n<\/tr>\n
                                                  %x<\/span><\/td>\n\u5341\u516d\u8fdb\u5236\u6574\u6570<\/span><\/td>\nscanf("%x", &h);<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                                  \u6ce8\u610f\u4e8b\u9879：<\/span><\/p>\n

                                                    \n
                                                  • %s \u8bfb\u53d6\u5b57\u7b26\u4e32\u65f6\u9047\u5230\u7a7a\u683c\u6216\u6362\u884c\u7b26\u505c\u6b62，\u53ef\u80fd\u5f15\u53d1\u7f13\u51b2\u533a\u6ea2\u51fa（\u5efa\u8bae\u7528 fgets \u66ff\u4ee3）\u3002<\/span><\/li>\n
                                                  • %lf \u662f double \u7c7b\u578b\u4e13\u7528，float \u9700\u7528 %f\u3002<\/span><\/li>\n<\/ul>\n
                                                    \n
                                                    9.2.4\u3001\u8d4b\u503c\u5ffd\u7565\u7b26 *<\/span><\/h6>\n

                                                    \u5728\u5360\u4f4d\u7b26\u524d\u52a0 * \u53ef\u5ffd\u7565\u8f93\u5165\u9879（\u4e0d\u8d4b\u503c\u7ed9\u53d8\u91cf），\u5e38\u7528\u4e8e\u8df3\u8fc7\u4e0d\u9700\u8981\u7684\u6570\u636e\u3002<\/span><\/p>\n

                                                    \u793a\u4f8b：\u8df3\u8fc7\u8f93\u5165\u4e2d\u7684\u65e5\u671f\u90e8\u5206：<\/span><\/p>\n

                                                    int year, month;
                                                    \nscanf("%d-%*d-%d", &year, &month); \/\/ \u8f93\u5165 "2023-05-15"，month \u4e3a 15，\u4e2d\u95f4 05 \u88ab\u5ffd\u7565<\/p>\n

                                                    <\/h6>\n<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

                                                    \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb79\u6b21\u3002\u5b83\u7684\u7b2c\u2f00\u4e2a\u53c2\u6570\u662f\u2f00\u4e2a\u683c\u5f0f\u5b57\u7b26\u4e32\uff0c\u91cc\u9762\u4f1a\u653e\u7f6e\u5360\u4f4d\u7b26\uff08\u4e0e\u7f16\u8bd1\u5668\u5982\u4f55\u89e3\u8bfb\u7528\u6237\u7684\u8f93\u5165\uff0c\u9700\u8981\u63d0\u53d6\u7684\u6570\u636e\u662f\u4ec0\u4e48\u7c7b\u578b\u3002\u8fd9\u662f\u56e0\u4e3aC\u8bed\u8a00\u7684\u6570\u636e\u90fd\u662f\u6709\u7c7b\u578b\u7684\uff0c\uff08\u4e0eprintf() \u7684\u5360\u4f4d\u7b26\u57fa\u672c\u4e00\u81f4\uff09\uff0cscanf() \u5fc5\u987b\u63d0\u524d\u77e5\u9053\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u7c7b\u578b\uff0c\u624d\u80fd\u5904\u7406\u6570\u636e\u3002sizeof \u662f\u2f00\u4e2a\u5173\u952e\u5b57\uff0c\u4e5f\u662f\u64cd\u4f5c\u7b26\uff0c\u4e13\u95e8\u662f\u7528\u6765\u8ba1\u7b97sizeof\u64cd\u4f5c\u7b26\u6570\u7684\u7c7b\u578b\u957f\u5ea6\u7684\uff0c\u5355\u4f4d\u662f\u5b57\u8282\u3002\u7c7b\u578b\u662f\u7528\u6765\u521b\u5efa\u53d8\u91cf\u7684\u3002\u6bcf\u4e00\u79cd\u6570\u636e\u7c7b\u578b\u90fd\u6709\u81ea\u5df1\u7684\u957f\u5ea6\uff0c\u4f7f\u7528\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u80fd\u591f\u521b\u5efa\u51fa\u957f\u5ea6\u4e0d\u540c\u7684\u53d8\u91cf\uff0c\u53d8\u91cf\u957f\u5ea6\u7684\u4e0d \u540c\uff0c\u5b58\u50a8\u7684\u6570\u636e\u8303\u56f4\u5c31\u6709\u6240\u5dee\u5f02\u3002<\/p>\n","protected":false},"author":2,"featured_media":57859,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174,190],"topic":[],"class_list":["post-57861","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-190"],"yoast_head":"\nC\u8bed\u8a00\u81ea\u5b66\u2014\u2014C\u8bed\u8a00\u6570\u636e\u7c7b\u578b\u548c\u53d8\u91cf - 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