{"id":119050,"date":"2026-10-28T20:24:57","date_gmt":"2026-10-28T12:24:57","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/119050.html"},"modified":"2026-10-28T20:24:57","modified_gmt":"2026-10-28T12:24:57","slug":"c%e8%af%ad%e8%a8%80%ef%bc%9a%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/119050.html","title":{"rendered":"C\u8bed\u8a00\uff1a\u6570\u7ec4"},"content":{"rendered":"

1. \u6570\u7ec4\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n

1.1 \u6982\u5ff5<\/h3>\n

\u6570\u7ec4(array)\u662f\u6709\u5e8f\u7684\u5143\u7d20\u5e8f\u5217<\/span><\/p>\n

\u82e5\u5c06\u6709\u9650\u4e2a\u7c7b\u578b\u76f8\u540c\u7684\u53d8\u91cf\u7684\u96c6\u5408\u547d\u540d，\u90a3\u4e48\u8fd9\u4e2a\u540d\u79f0\u4e3a\u6570\u7ec4\u540d\u3002<\/span><\/p>\n

\u91cd\u70b9\u5fc5\u987b\u7c7b\u578b\u76f8\u540c\u548c\u8fde\u7eed\u7684\u53d8\u91cf\u7684\u96c6\u5408<\/span><\/p>\n

1.2 \u683c\u5f0f<\/span><\/h3>\n

\u5b58\u50a8\u7c7b\u578b \u6570\u636e\u7c7b\u578b \u6570\u7ec4\u540d[\u5143\u7d20\u4e2a\u6570];<\/span>
\n\u4f8b\u5982：(auto) int a[5]; \/\/ \u8fd9\u4e2aauto\u7684\u5176\u4e2d\u4e00\u79cd\u5b58\u50a8\u7c7b\u578b，\u901a\u5e38\u7701\u7565\u4e0d\u5199，\u540e\u9762\u4f1a\u5b66\u5230<\/p>\n

\u6570\u7ec4\u540d：\u4ee3\u8868\u6570\u7ec4\u7684\u9996\u5730\u5740(\u5373\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740)，a\u662f\u5730\u5740\u5e38\u91cf，\u4e0d\u80fd\u4e3a\u5de6\u503c，\u4e0d\u80fd\u88ab\u8d4b\u503c\u3002<\/span><\/p>\n

\u6570\u7ec4\u7684\u5b9a\u4e49\u65b9\u6cd5：
\n\u00a0 \u00a0 \u00a0 \u00a0 1. \u6570\u7ec4\u540d\u5b9a\u4e49\u89c4\u5219\u8ddf\u53d8\u91cf\u540d\u76f8\u540c，\u9075\u5faa\u6807\u8bc6\u7b26\u5b9a\u4e49\u89c4\u5219
\n\u00a0 \u00a0 \u00a0 \u00a0 2. \u6570\u7ec4\u540d\u540e\u4f7f\u7528\u65b9\u62ec\u53f7\u62ec\u8d77\u6765\u7684\u5e38\u91cf\u8868\u8fbe\u5f0f\u8868\u793a\u5143\u7d20\u4e2a\u6570
\n\u00a0 \u00a0 \u00a0 \u00a0 3. \u5e38\u91cf\u8868\u8fbe\u5f0f\u4e2d\u53ef\u4ee5\u5305\u542b\u5e38\u91cf\u548c\u5b8f\u5b9a\u4e49，\u4e0d\u80fd\u5305\u542b\u53d8\u91cf<\/p>\n

1.3 \u8bbf\u95ee\u5143\u7d20<\/h3>\n

\u6570\u7ec4\u540d[\u4e0b\u6807];\u00a0 \u00a0 \/\/ \u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\u4e0b\u6807\u4ece0\u5f00\u59cb
\n\u4f8b\u5982：\u8bbf\u95ee\u7b2c\u4e00\u4e2a\u5143\u7d20\u5c31\u662f：a[0]<\/p>\n

\u6ce8：int a[5]; int b = a[5];
\n\/\/\u8fd9\u91cc\u7684a[5]\u5c31\u5c5e\u4e8e\u6570\u7ec4\u8d8a\u754c\u9519\u8bef，\u56e0\u4e3a\u6570\u7ec4\u662f\u4ece0\u5f00\u59cb\u7684，\u6570\u7ec4\u4e0b\u6807\u53ea\u6709{0，1，2，3，4}<\/p>\n

\u6570\u7ec4\u7684\u7279\u70b9：\u6570\u636e\u7c7b\u578b\u76f8\u540c\u00a0 \u00a0 \u5185\u5b58\u8fde\u7eed<\/p>\n

\u603b\u7ed3\u6ce8\u610f：<\/span>
\n\u00a0 \u00a0 \u00a0 \u00a0 1. \u6570\u7ec4\u7684\u6570\u636e\u7c7b\u578b\u5c31\u662f\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02.\u00a0\u6570\u7ec4\u540d\u8981\u7b26\u5408\u6807\u8bc6\u7b26\u547d\u540d\u89c4\u5219
\n\u00a0 \u00a0 \u00a0 \u00a0 3. \u5728\u540c\u4e00\u4e2a\u51fd\u6570\u4e2d，\u6570\u7ec4\u540d\u4e0d\u8981\u4e0e\u53d8\u91cf\u540d\u76f8\u540c<\/span>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int a;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int a[5]; \/\/\u9519\u8bef
\n\u00a0 \u00a0 \u00a0 \u00a0 4. \u4e0b\u6807\u4ece0\u5f00\u59cb，\u5230n-1\u7ed3\u675f<\/span><\/p>\n

2. \u4e00\u7ef4\u6570\u7ec4<\/h2>\n

2.1 \u4e00\u7ef4\u6570\u7ec4\u6982\u5ff5<\/h3>\n

\u53ea\u6709\u4e00\u4e2a\u4e0b\u6807\u7684\u6570\u7ec4<\/span><\/p>\n

\u683c\u5f0f： \u5b58\u50a8\u7c7b\u578b \u6570\u636e\u7c7b\u578b \u6570\u7ec4\u540d[\u5143\u7d20\u4e2a\u6570];<\/span><\/p>\n

\u8bbf\u95ee\u5143\u7d20: \u6570\u7ec4\u540d[\u4e0b\u6807], \u4e0b\u6807\u4ece0\u5f00\u59cb<\/span><\/p>\n

\u6570\u7ec4\u540d: \u9996\u5730\u5740，<\/span>\u4e5f\u5c31\u662f\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740(\u7b49\u4ef7\u4e8e&a[0])<\/span><\/p>\n

2.2 \u521d\u59cb\u5316<\/span><\/h3>\n

1. \u5b9a\u4e49\u65f6\u5168\u90e8\u521d\u59cb\u5316<\/span><\/p>\n

int a[5] = {1, 2, 3, 4, 5};<\/p>\n

2. \u5b9a\u4e49\u65f6\u90e8\u5206\u521d\u59cb\u5316，\u672a\u521d\u59cb\u5316\u7684\u5143\u7d20\u503c\u4e3a0<\/p>\n

int a[5] = {1, 2}; \/\/ \u53ea\u521d\u59cb\u5316\u524d\u4e24\u4e2a\u5143\u7d20，\u540e\u9762\u7684\u672a\u521d\u59cb\u5316\u5143\u7d20\u4e3a0<\/p>\n

3. \u672a\u521d\u59cb\u5316：\u53ea\u5b9a\u4e49\u672a\u8d4b\u503c，\u9700\u8981\u5355\u4e2a\u5143\u7d20\u8d4b\u503c\u3002(\u4e0d\u7136\u5c40\u90e8\u53d8\u91cf\u662f\u968f\u673a\u503c)<\/span><\/p>\n

int a[5];
\na[0] = 1;
\na[1] = 2;
\na[2] = 3;
\na[3] = 4;
\na[4] = 5;<\/p>\n

\u6ce8\u610f\u5b9a\u4e49\u65f6\u4e0d\u80fd\u6570\u7ec4\u8d8a\u754c！！！<\/p>\n

int a[3]={1,2,3,4}; \/\/\u9519\u8bef，\u6570\u7ec4\u8d8a\u754c!!!<\/p>\n

2.3 \u5b9a\u4e49\u7a7a\u6570\u7ec4<\/h3>\n

int a[5]={0,0,0,0,0};
\nint a[5]={0};
\nint a[5]={};<\/p>\n

2.4 \u6570\u7ec4\u5f15\u7528<\/h3>\n
  • \u5148\u5b9a\u4e49\u540e\u5f15\u7528<\/span><\/li>\n
  • \u6bcf\u6b21\u53ea\u80fd\u5f15\u7528\u4e00\u4e2a\u6570\u7ec4\u5143\u7d20a[i]，\u5982\u679c\u60f3\u5f15\u7528\u6240\u6709\u7684\u5143\u7d20\u5faa\u73af\u904d\u5386（\u6328\u4e2a\u8bbf\u95ee\u6bcf\u4e2a\u6570\u7ec4\u5143\u7d20）\u3002<\/span><\/li>\n
  • \u5f15\u7528\u65f6\u4e0d\u8981\u6570\u7ec4\u8d8a\u754c，\u867d\u7136\u6709\u65f6\u5019\u7f16\u8bd1\u5668\u4e0d\u4f1a\u62a5\u9519\u3002<\/span><\/li>\n
  • \u6253\u5370\u6570\u7ec4\u5143\u7d20\u7684\u5730\u5740\u7528%p\u683c\u5f0f\u3002<\/span><\/li>\n

    \u4f8b\u5982：
    \n#include <stdio.h><\/p>\n

    int main(int argc[], char const *argv[])
    \n{
    \n int a[5] = {1, 2, 3, 4, 5};
    \n for(int i = 0; i < 5; i++)
    \n printf("%d\\\\n",a[i]);
    \n printf("%p %p\\\\n", a, &a[0]);
    \n \/\/ \u8fd9\u91cc\u7684%p\u662f\u4e3a\u4e86\u9a8c\u8bc1\u770b\u4e00\u4e0b\u6570\u7ec4\u540d==\u9996\u5143\u7d20\u5730\u5740
    \n return 0;
    \n}<\/p>\n

    2.5 \u6570\u7ec4\u5927\u5c0f<\/h3>\n

    \u4f8b\u5982：
    \n\u00a0 \u00a0 \u00a0 \u00a0 int a[5];\u00a0 \u00a0 \/\/20
    \n\u00a0 \u00a0 \u00a0 \u00a0 double b[2];\u00a0 \u00a0 \/\/16
    \n\u00a0 \u00a0 \u00a0 \u00a0 char c[32];\u00a0 \u00a0 \/\/32<\/p>\n

    \u8ba1\u7b97\u65b9\u5f0f：<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 1. \u6570\u7ec4\u5143\u7d20\u4e2a\u6570 * \u6570\u636e\u7c7b\u578b\u5927\u5c0f
    \n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u00a0 \u6570\u7ec4\u5143\u7d20\u4e2a\u6570 = sizeof(\u6570\u7ec4\u540d) \/ sizeof(\u6570\u636e\u7c7b\u578b)<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 2. sizeof(\u6570\u7ec4\u540d)<\/p>\n

    \u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u7a0b\u5e8f\u81ea\u5df1\u8fd0\u884c\u8bd5\u4e00\u4e0b：<\/p>\n

    #include <stdio.h>
    \nint main(int argc, char const *argv[])
    \n{
    \n int a[5];
    \n double b[2];
    \n char c[32];<\/p>\n

    printf("%ld\\\\n", sizeof(a)); \/\/ 20
    \n printf("%ld\\\\n", sizeof(b)); \/\/ 16
    \n printf("%ld\\\\n", sizeof(c)); \/\/ 32<\/p>\n

    int n = sizeof(a) \/ sizeof(int);
    \n printf("%d\\\\n", n); \/\/ 5<\/p>\n

    return 0;
    \n}<\/p>\n

    \u8fd9\u4e2a\u5730\u65b9\u4e5f\u6709\u4e00\u4e2a\u975e\u5e38\u7ecf\u5178\u7684\u9898\u76ee：<\/p>\n

    \u00a0 \u00a0 \u00a0 \u00a0 \u8ba1\u7b97\u6590\u6ce2\u90a3\u5951\u6570\u5217\u524d15\u9879\u5e76\u9006\u5e8f\u8f93\u51fa\u00a0 \u00a0 \u00a0 \u00a0 \/\/ 1 1 2 3 5 8 13 21…<\/p>\n

    #include <stdio.h>
    \nint main(int argc, char const *argv[])
    \n{
    \n int a[15] = {1, 1}; \/\/ \u8d4b\u503c\u524d\u4e24\u4e2a\u5143\u7d20<\/p>\n

    for (int i = 2; i < 15; i++) \/\/ \u4ece\u7b2c\u4e09\u4e2a\u5143\u7d20\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u904d\u5386\u8d4b\u503c
    \n a[i] = a[i – 1] + a[i – 2];<\/p>\n

    for (int i = 14; i >= 0; i–) \/\/ \u9006\u5e8f\u6253\u5370
    \n printf("%d ", a[i]);<\/p>\n

    printf("\\\\n");<\/p>\n

    return 0;
    \n}<\/p>\n

    2.6 \u6e05\u96f6\u51fd\u6570<\/h3>\n

    2.6.1 bzero()\u51fd\u6570<\/h4>\n

    #include <strings.h>
    \nvoid bzero(void *s, size_t n);
    \n\u529f\u80fd:\u5c06\u5185\u5b58\u7a7a\u95f4\u8bbe\u7f6e\u4e3a0
    \n\u53c2\u6570：
    \n s:\u8981\u6e05\u7a7a\u7684\u7a7a\u95f4\u9996\u5730\u5740
    \n n:\u5b57\u8282\u5927\u5c0f
    \n\u8fd4\u56de\u503c：\u65e0<\/p>\n

    2.6.2 memset()\u51fd\u6570<\/h4>\n

    #include <string.h>
    \nvoid *memset(void *s, int c, size_t n);
    \n\u529f\u80fd：\u5c06\u6307\u5b9a\u5185\u5b58\u7a7a\u95f4\u5185\u5bb9\u8bbe\u7f6e\u4e3a0
    \n\u53c2\u6570：s:\u6307\u5b9a\u5185\u5b58\u9996\u5730\u5740
    \n c:\u8981\u8bbe\u7f6e\u7684\u6570，\u4e00\u822c\u4e3a0
    \n n：\u8981\u8bbe\u7f6e\u7684\u5185\u5b58\u5927\u5c0f
    \n\u8fd4\u56de\u503c：\u6307\u5b9a\u5185\u5b58\u9996\u5730\u5740（\u4e00\u822c\u4e0d\u7528）<\/p>\n

    \u8fd9\u4e24\u4e2a\u51fd\u6570\u6682\u65f6\u7528\u4e0d\u7740\u4f46\u662f\u4e5f\u5f88\u91cd\u8981\u5728\u540e\u9762\u5b66\u4e60\u5355\u7247\u673a\u7684\u65f6\u5019<\/p>\n

    2.7 \u6570\u7ec4\u7684\u5185\u5b58\u5206\u914d<\/h3>\n

    int a[<\/span>5<\/span>]<\/span>;<\/span><\/p>\n

    a\u662f\u6570\u7ec4\u540d，\u662f\u6570\u7ec4\u7684\u9996\u5730\u5740，\u4e5f\u5c31\u662f\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\u5373&a[<\/span>0]<\/span><\/p>\n

    a+1\u662f\u7b2c\u4e8c\u4e2a\u5143\u7d20\u7684\u5730\u5740，\u5373&a[1]<\/span><\/p>\n

    \u6ce8\u610f：\u8fd9\u91cc\u7684\u5730\u5740+1\u8868\u793a\u4e0b\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740，\u800c\u4e0d\u662f\u6570\u503c\u4e0a+1<\/span><\/p>\n\n\n\n\n\n\n\n\n
    int a[5];<\/td>\n\u5730\u5740<\/td>\n\u5730\u5740<\/td>\n<\/tr>\n
    a[0]<\/td>\n&a[0]<\/td>\na<\/td>\n<\/tr>\n
    a[1]<\/td>\n&a[1]<\/td>\na+1<\/td>\n<\/tr>\n
    a[2]<\/td>\n&a[2]<\/td>\na+2<\/td>\n<\/tr>\n
    a[3]<\/td>\n&a[3]<\/td>\na+3<\/td>\n<\/tr>\n
    a[4]<\/td>\n&a[4]<\/td>\na+4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u4ee3\u7801\u770b\u4e00\u4e0b\u4e24\u8005\u8868\u793a\u7684\u5730\u5740\u662f\u4e00\u6837\u7684<\/p>\n

    #include <stdio.h>
    \nint main(int argc, char const *argv[])
    \n{
    \n int a[5];
    \n for(int i = 0; i < 5; i++)
    \n printf("%p %p\\\\n", &a[i], a + i);
    \n return 0;
    \n}<\/p>\n

    3. \u5b57\u7b26\u6570\u7ec4<\/h2>\n

    \u56e0\u4e3aC\u8bed\u8a00\u6ca1\u6709\u5b57\u7b26\u4e32\u7c7b\u578b，\u6240\u4ee5\u53ef\u4ee5\u7528\u5b57\u7b26\u6570\u7ec4\u7684\u5f62\u5f0f\u8868\u793a\u5b57\u7b26\u4e32\u3002<\/span><\/p>\n

    \u7c7b\u578b\u4e3a\u5b57\u7b26\u7684\u6570\u7ec4\u5c31\u662f\u5b57\u7b26\u6570\u7ec4，\u4e5f\u5c31\u662f\u8bf4\u6570\u7ec4\u4e2d\u6bcf\u4e2a\u5143\u7d20\u662f\u5b57\u7b26\u7c7b\u578b，\u53ef\u4ee5\u8868\u793a\u5b57\u7b26\u4e32\u3002<\/span><\/p>\n

    3.1 \u5b9a\u4e49\u65f6\u521d\u59cb\u5316\u8868\u793a\u5f62\u5f0f<\/span><\/h3>\n

    1. \u5355\u4e2a\u5b57\u7b26：<\/span><\/p>\n

    char s1[5] = {'h','e','l','l','o'}; \/\/sizeof(s1)=5
    \nchar s2[] = {'h','e','l','l','o'}; \/\/sizeof(s2)=5<\/p>\n

    2. \u7528\u5b57\u7b26\u4e32\u8868\u793a，\u7ed3\u5c3e\u4f1a\u81ea\u52a8\u52a0\u4e0a'\\\\0'<\/p>\n

    char s1[]={"hello"}; \/\/sizeof(s1)=6 \u56e0\u4e3a\u7ed3\u5c3e\u4f1a\u81ea\u52a8\u6dfb\u52a0'\\\\0'
    \nchar s2[]="hello"; \/\/sizeof(s2)=6
    \nchar s3[6]={"hello"}; \/\/sizeof(s3)=6
    \nchar s4[6]="hello"; \/\/sizeof(s4)=6
    \nchar s5[]={}; \/\/\u9519\u8bef<\/p>\n

    3.2 \u8f93\u5165\u8f93\u51fa<\/h3>\n

    1. \u7528 scanf \/ printf<\/p>\n

    char s[32] = "hello";
    \nprintf("%s\\\\n", s); \/\/ \u6253\u5370\u5b57\u7b26\u4e32
    \nscanf("%s", s); \/\/ \u8f93\u5165\u5b57\u7b26\u4e32，\u8f93\u5165\u5b8c\u4f1a\u81ea\u52a8\u6dfb\u52a0'\\\\0'\u4f5c\u4e3a\u5b57\u7b26\u4e32\u7ed3\u5c3e\u7684\u6807\u5fd7，
    \n \/\/ \u4f46\u662f\u8be5\u5199\u6cd5\u4e0d\u80fd\u63a5\u53d7\u7a7a\u683c\u7684\u8f93\u5165（\u7a7a\u683c\u3001\u56de\u8f66\u3001Tab\u90fd\u4f1a\u5f53\u6210\u8f93\u5165\u6807\u5fd7）
    \nprintf("%s\\\\n", s); \/\/ \u6253\u5370\u5230\\\\0\u5c31\u505c\u4e86
    \n\/*\u9a8c\u8bc1*\/
    \nfor (int i = 0; i < 32; i++)
    \n printf("%d: %c\\\\n", i, s[i]);<\/p>\n

    \u7531\u4e8escanf("%s\\\\n", s);\u4e0d\u80fd\u8f93\u5165\u7a7a\u683c，\u5982\u679c\u6709\u7a7a\u683c，\u7a7a\u683c\u540e\u9762\u7684\u5185\u5bb9\u5c31\u4e0d\u4f1a\u5b58\u5165\u5230\u6570\u7ec4<\/p>\n

    \u5982\u679c\u9700\u8981\u6709\u7a7a\u683c
    \nscanf("%[^\\\\n]",str);
    \n\/\/\u6b63\u5219\u8868\u8fbe\u5f0f，\u53ef\u4ee5\u8f93\u5165\u9664\u4e86\\\\n\u4ee5\u5916\u7684\u5b57\u7b26，\u9047\u5230\\\\n\u7ed3\u675f<\/p>\n

    2. \u7528for\u5faa\u73af\u904d\u5386\u8f93\u5165\u8f93\u51fa<\/p>\n

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

    int main(int argc, char const *argv[])
    \n{
    \n char str[6] = "";
    \n for (int i = 0; i < 6; i++)
    \n scanf("%c", &str[i]);
    \n for (int i = 0; i < 6; i++)
    \n printf("%c", str[i]);<\/p>\n

    return 0;
    \n}<\/p>\n

    \u4f8b\u9898：\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32，\u8ba1\u7b97\u5176\u7a7a\u683c\u4e2a\u6570<\/p>\n

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

    int main(int argc, char const *argv[])
    \n{
    \n int n = 0;
    \n char s[32] = "";
    \n scanf("%[^\\\\n]", s);
    \n \/\/ for (int i = 0; i < 32; i++)
    \n for (int i = 0; s[i] != '\\\\0'; i++)
    \n {
    \n if (s[i] == ' ')
    \n n++;
    \n }
    \n printf("%d\\\\n", n);<\/p>\n

    return 0;
    \n}<\/p>\n

    \u6613\u9519\u70b9：<\/p>\n

    char s[10] = {}; \/\/\u5bf9\u7684
    \ns[10] = "hello"; \/\/\u9519\u8bef，\u4e0d\u80fd\u5c06\u5b57\u7b26\u4e32\u8d4b\u503c\u7ed9\u6570\u7ec4\u5143\u7d20
    \n \/\/\u505a\u9898\u975e\u5e38\u6613\u9519
    \ns = "hello"; \/\/\u9519\u8bef，s\u662f\u5730\u5740\u5e38\u91cf，\u4e0d\u80fd\u4e3a\u5de6\u503c
    \nstrcpy(s, "hello"); \/\/\u6b63\u786e，\u8fd9\u662f\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u4e86\u89e3\u4e00\u4e0b<\/p>\n

    3.3 \u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6<\/h3>\n

    3.3.1 \u7528\u5faa\u73af\u7edf\u8ba1<\/h4>\n

    \u8fd9\u4e2a\u65f6\u5019\u7528while\u662f\u66f4\u52a0\u65b9\u4fbf\u7684<\/p>\n

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

    int main(int argc, char const *argv[])
    \n{
    \n char str[32] = "hello world";
    \n int i = 0;
    \n while (str[i] != '\\\\0')
    \n {
    \n i++;
    \n }
    \n printf("%d\\\\n", i);<\/p>\n

    return 0;
    \n}<\/p>\n

    3.3.2 \u7528strlen()<\/h4>\n

    #include <string.h>
    \nsize_t strlen(const char *s);
    \n\u529f\u80fd：\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6
    \n\u53c2\u6570：\u5b57\u7b26\u4e32\u7684\u9996\u5730\u5740
    \n\u8fd4\u56de\u503c：\u8fd4\u56de\u5b57\u7b26\u4e32\u5b9e\u9645\u957f\u5ea6，\u4e0d\u5305\u62ec\u2018\\\\0\u2019\u5728\u5185\u3002<\/p>\n

    3.3.3 sizeof \u548c strlen\u00a0 \u7684\u533a\u522b<\/h4>\n
  • sizeof\u662f\u5173\u952e\u5b57，strlen\u662f\u51fd\u6570\u3002<\/span><\/li>\n
  • sizeof\u662f\u8ba1\u7b97\u6570\u636e\u6240\u5360\u7a7a\u95f4\u5927\u5c0f，strlen\u53ea\u80fd\u8ba1\u7b97\u5b57\u7b26\u4e32\u7684\u5b9e\u9645\u957f\u5ea6\u3002<\/span><\/li>\n
  • \u5b9a\u4e49\u5b57\u7b26\u4e32\u6570\u7ec4\u540c\u65f6\u8d4b\u503c\u4e14\u7701\u7565\u5143\u7d20\u4e2a\u6570\u65f6，sizeof\u8ba1\u7b97\u5b57\u7b26\u4e32\u5305\u542b'\\\\0',strlen\u8ba1\u7b97\u4e0d\u5305\u542b'\\\\0'，\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6，sizeof\u6bd4strlen\u8ba1\u7b97\u591a1<\/span><\/li>\n

    4.\u00a0\u6392\u5e8f（\u91cd\u4e2d\u4e4b\u91cd！！！）<\/h2>\n

    4.1 \u5192\u6ce1\u6392\u5e8f<\/h3>\n

    \u6392\u5e8f\u8fc7\u7a0b：<\/p>\n

  • \u6bd4\u8f83\u7b2c\u4e00\u4e2a\u548c\u7b2c\u4e8c\u4e2a\u5143\u7d20，\u5982\u679c\u7b2c\u4e00\u4e2a\u5927\u4e8e\u7b2c\u4e8c\u4e2aa[0]>a[1]\u5219\u4ea4\u6362，\u7136\u540e\u6bd4\u8f83\u7b2c\u4e8c\u4e2a\u548c\u7b2c\u4e09\u4e2a\u6570，\u524d\u9762\u7684\u5927\u5c31\u4ea4\u6362；\u4f9d\u6b21\u7c7b\u63a8，\u76f4\u5230\u7b2cn-1\u548c\u7b2cn\u4e2a\u6570\u6bd4\u8f83\u5b8c\u4e3a\u6b62\u3002\u7b2c\u4e00\u8d9f\u5192\u6ce1\u6392\u5e8f\u5b8c\u6210，\u7ed3\u679c\u6700\u5927\u7684\u6570\u88ab\u653e\u5728\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u4f4d\u7f6e\u4e0a\u4e86\u3002<\/span><\/li>\n
  • \u5bf9\u524dn-1\u4e2a\u6570\u8fdb\u884c\u7b2c\u4e8c\u8d9f\u5192\u6ce1\u6392\u5e8f，\u7ed3\u679c\u4f7f\u6b21\u5927\u7684\u6570\u653e\u5728\u7b2cn-1\u4e2a\u5143\u7d20\u4f4d\u7f6e\u4e0a\u4e86\u3002<\/span><\/li>\n
  • \u91cd\u590d\u4e0a\u8ff0\u8fc7\u7a0b，\u5171\u7ecf\u8fc7n-1\u8d9f\u5192\u6ce1\u6392\u5e8f\u540e，\u6392\u5e8f\u7ed3\u675f<\/span>
    \n\"\"<\/p>\n

    \u5916\u5c42\u5faa\u73af\u8f6e\u6570i=\u4e2a\u6570-1 = N-1(0\u5230<N-1)
    \n\u5185\u5b58\u5faa\u73af\u6bd4\u8f83\u6b21\u6570j = \u4e2a\u6570-1-\u8f6e\u6570(\u4ece0\u5f00\u59cb) = N-1-i
    \n#include <stdio.h>
    \n#define N 5<\/p>\n

    int main(int argc, char const *argv[])
    \n{
    \n int a[N] = {5, 4, 3, 2, 1}, t;
    \n for (int i = 0; i < N – 1; i++) \/\/ \u5916\u5c42\u5faa\u73af\u8f6e\u6570
    \n {
    \n for (int j = 0; j < N – 1 – i; j++) \/\/ \u5185\u5c42\u5faa\u73af\u6bd4\u8f83\u6b21\u6570
    \n {
    \n if (a[j] > a[j + 1]) \/\/ \u6bd4\u8f83
    \n {
    \n \/\/ \u4ea4\u6362
    \n t = a[j];
    \n a[j] = a[j + 1];
    \n a[j + 1] = t;
    \n }
    \n }
    \n }
    \n for (int i = 0; i < N; i++)
    \n printf("%d ", a[i]);
    \n printf("\\\\n");<\/p>\n

    return 0;
    \n}<\/p>\n

    <\/h3>\n<\/li>\n

    4.2 \u9009\u62e9\u6392\u5e8f<\/h3>\n

    \u6392\u5e8f\u8fc7\u7a0b：<\/p>\n

  • \u9996\u5148\u901a\u8fc7n-1\u6b21\u6bd4\u8f83，\u4ecen\u4e2a\u6570\u4e2d\u627e\u5230\u6700\u5c0f\u7684\u6570，\u5c06\u5b83\u4e0e\u7b2c\u4e00\u4e2a\u6570\u4ea4\u6362，\u7b2c\u4e00\u8d9f\u9009\u62e9\u6392\u5e8f\u7ed3\u679c\u6700\u5c0f\u6570\u88ab\u5b89\u7f6e\u5728\u7b2c\u4e00\u4e2a\u5143\u7d20\u4f4d\u7f6e\u4e0a\u3002<\/span><\/li>\n
  • \u518d\u901a\u8fc7n-2\u6b21\u6bd4\u8f83，\u4ece\u5269\u4f59\u7684n-1\u4e2a\u6570\u4e2d\u627e\u5230\u6b21\u5c0f\u7684\u6570，\u5c06\u5b83\u4e0e\u7b2c\u4e8c\u4e2a\u6570\u4ea4\u6362，\u7b2c\u4e8c\u8d9f\u9009\u62e9\u6392\u5e8f\u5c06\u6b21\u5c0f\u7684\u6570\u5b89\u7f6e\u5728\u7b2c\u4e8c\u4e2a\u5143\u7d20\u4f4d\u7f6e\u4e0a\u3002<\/span><\/li>\n
  • \u91cd\u590d\u4e0a\u8ff0\u8fc7\u7a0b，\u5171\u7ecf\u8fc7n-1\u8d9f\u6392\u5e8f\u540e，\u6392\u5e8f\u7ed3\u675f\u3002<\/span>
    \n\"\"<\/li>\n

    \u8f6e\u6570=\u4e2a\u6570-1=N-1(\u540c\u5192\u6ce1)
    \n\u6bcf\u8f6e\u6bd4\u8f83\u7684j: \u4ecei+1\u5f00\u59cb\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20N-1
    \n#include <stdio.h><\/p>\n

    int main(int argc, char const *argv[])
    \n{
    \n int a[5] = {76, 56, 1, 45, 10};
    \n int min = 0, t;
    \n for (int i = 0; i < 4; i++) \/\/ \u5916\u5c42\u5faa\u73af\u8f6e\u6570(\u540c\u5192\u6ce1)
    \n {
    \n min = i; \/\/ \u62ff\u7740\u4e0b\u6807\u4e3ai\u7684\u5143\u7d20\u5f00\u59cb\u6bd4\u8f83
    \n for (int j = i + 1; j < 5; j++) \/\/ \u4ecei\u7684\u540e\u4e00\u4e2a\u5143\u7d20\u5f00\u59cb\u4e00\u76f4\u6bd4\u8f83\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20
    \n {
    \n if (a[j] < a[min]) \/\/ \u5982\u679c\u6709\u66f4\u5c0f\u7684\u6570
    \n min = j;
    \n } \/\/ \u5faa\u73af\u7ed3\u675f\u540e\u6700\u5c0f\u5143\u7d20\u7684\u4e0b\u6807\u5c31\u88abmin\u4fdd\u5b58\u4e86<\/p>\n

    \/\/ \u4ea4\u6362\u6700\u5c0f\u7684\u5143\u7d20\u548c\u524d\u9762\u7684\u5143\u7d20
    \n if (a[min] != a[i])
    \n {
    \n t = a[min];
    \n a[min] = a[i];
    \n a[i] = t;
    \n }
    \n }
    \n for (int i = 0; i < 5; i++)
    \n printf("%d ", a[i]);
    \n printf("\\\\n");<\/p>\n

    return 0;
    \n}<\/p>\n

    5. \u4e8c\u7ef4\u6570\u7ec4<\/h2>\n

    \u4e8c\u7ef4\u6570\u7ec4<\/span>\u4e0b\u6807\u4e3a\u4e24\u4e2a\u7684\u6570\u7ec4，\u4e0b\u6807\u5206\u522b\u662f\u884c\u4e0b\u6807\u548c\u5217\u4e0b\u6807\u3002<\/span><\/p>\n

    5.1 \u5b9a\u4e49\u683c\u5f0f<\/span><\/h3>\n

    \u5b58\u50a8\u7c7b\u578b \u6570\u636e\u7c7b\u578b \u6570\u7ec4\u540d[\u884c\u6570][\u5217\u6570];<\/span><\/p>\n

    5.2 \u8bbf\u95ee\u5143\u7d20<\/span><\/h3>\n

    \u6570\u7ec4\u540d[\u884c\u4e0b\u6807][\u5217\u4e0b\u6807]; (\u4e0b\u6807\u90fd\u4ece0\u5f00\u59cb)<\/span><\/p>\n

    a[0][0]; \/\/\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217<\/span><\/p>\n

    a[n-1][m-1]; \/\/\u7b2cn\u884c\u7b2cm\u5217\u5143\u7d20<\/span><\/p>\n

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

  • \u884c\u4e0b\u6807\u548c\u5217\u4e0b\u6807\u90fd\u662f\u4ece0\u5f00\u59cb，\u4e0d\u80fd\u8d8a\u754c!!!<\/span><\/li>\n
  • \u5b9a\u4e49\u540c\u65f6\u521d\u59cb\u5316\u65f6\u884c\u6570\u53ef\u4ee5\u7701\u7565，\u5217\u6570\u4e0d\u80fd\u7701\u7565<\/span><\/li>\n
  • \u6570\u7ec4\u540d\u4ee3\u8868\u6570\u7ec4\u9996\u884c\u5730\u5740<\/span><\/li>\n

    5.3 \u4e8c\u7ef4\u6570\u7ec4\u5927\u5c0f<\/span><\/h3>\n

    \u5143\u7d20\u4e2a\u6570 = \u884c\u6570 * \u5217\u6570<\/span><\/p>\n

    \u4e8c\u7ef4\u6570\u7ec4\u5927\u5c0f:<\/span><\/p>\n

  • \u884c\u6570*\u5217\u6570*\u6570\u636e\u7c7b\u578b\u5927\u5c0f<\/span><\/li>\n
  • sizeof(\u6570\u7ec4\u540d)<\/span><\/li>\n

    5.4 \u521d\u59cb\u5316\u4e8c\u7ef4\u6570\u7ec4<\/h3>\n
  • \u5b9a\u4e49\u65f6\u5168\u90e8\u521d\u59cb\u5316<\/span>
    \nint a[2][3] = {{1,2,3},{4,5,6}}; \/\/\u6309\u884c\u8d4b\u503c<\/span>
    \nint a[2][3] = {1,2,3,4,5,6}; \/\/\u987a\u5e8f\u8d4b\u503c<\/span><\/li>\n
  • \u5b9a\u4e49\u65f6\u90e8\u5206\u521d\u59cb\u5316，\u672a\u521d\u59cb\u5316\u7684\u5143\u7d20\u503c\u4e3a0<\/span>
    \nint a[2][3] = {{1,2},{4,5}}; \/\/\u6309\u884c\u8d4b\u503c<\/span>
    \nint a[2][3] = {1,2,3,4,}; \/\/\u987a\u5e8f\u8d4b\u503c<\/span><\/li>\n
  • \u5148\u5b9a\u4e49\u540e\u521d\u59cb\u5316，\u672a\u521d\u59cb\u5316，\u9700\u8981\u7ed9\u6bcf\u4e2a\u5143\u7d20\u5355\u72ec\u8d4b\u503c<\/span><\/li>\n

    5.5 \u904d\u5386\u4e8c\u7ef4\u6570\u7ec4<\/span><\/h3>\n

    \u5faa\u73af\u5d4c\u5957\u6765\u904d\u5386\u4e8c\u7ef4\u6570\u7ec4，\u5916\u5c42\u5faa\u73af\u884c\u6570，\u5185\u5c42\u5faa\u73af\u5217\u6570\u3002<\/span><\/p>\n

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

    int main(int argc, char const *argv[])
    \n{
    \n int a[2][3] = {{1, 2}, {4, 5}};
    \n for (int i = 0; i < 2; i++)
    \n {
    \n for (int j = 0; j < 3; j++)
    \n printf("%d ", a[i][j]);
    \n printf("\\\\n");
    \n }
    \n return 0;
    \n}<\/p>\n

    5.6 \u5185\u5b58\u5206\u914d<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    int[2][3]\u4e3a\u4f8b<\/td>\n<\/tr>\n
    <\/td>\n\u884c\u5730\u5740<\/td>\n\u5217\u5730\u5740<\/td>\n<\/td>\n<\/tr>\n
    a[0][0]<\/td>\n&a[0][0]<\/td>\n*a<\/td>\na[0]<\/td>\n<\/tr>\n
    a[0][1]<\/td>\n&a[0][1]<\/td>\n*a+1<\/td>\na[0]+1<\/td>\n<\/tr>\n
    a[0][2]<\/td>\n&a[0][2]<\/td>\n*a+2<\/td>\na[0]+2<\/td>\n<\/tr>\n
    a[1][0]<\/td>\n&a[1][0]<\/td>\n*(a+1)<\/td>\na[1]<\/td>\n<\/tr>\n
    a[1][1]<\/td>\n&a[1][1]<\/td>\n*(a+1)+1<\/td>\na[1]+1<\/td>\n<\/tr>\n
    a[1][2]<\/td>\n&a[1][2]<\/td>\n*(a+1)+2<\/td>\na[1]+2<\/td>\n<\/tr>\n
    a[i][j]<\/td>\n&a[i][j]<\/td>\n*(a+i)+j<\/td>\na[i]+j<\/td>\n<\/tr>\n
    \u884c\u5730\u5740\u524d\u9762\u52a0*\u4ee3\u8868\u964d\u7ea7\u4e3a\u5217\u5730\u5740（\u8be5\u884c\u7b2c\u4e00\u5217\u7684\u5730\u5740）<\/td>\n<\/tr>\n
    \u6570\u7ec4\u540d[\u884c\u4e0b\u6807]\u4ee3\u8868\u8fd9\u4e00\u884c\u7b2c\u5217\u7684\u5730\u5740\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    1. \u884c\u5730\u5740<\/span><\/p>\n

    \u4e8c\u7ef4\u6570\u7ec4\u4e2d，\u6570\u7ec4\u540da\u8868\u793a\u7b2c\u4e00\u884c\u7684\u5730\u5740，\u5176\u6570\u503c\u548c\u7b2c\u4e00\u884c\u7b2c\u4e00\u5217\u7684\u5730\u5740\u5373&a[0][0]\u4e00\u6837，\u4f46\u662f\u542b\u4e49\u4e0d\u4e00\u6837\u3002<\/span><\/p>\n

    a+1\u8868\u793a\u7b2c\u4e8c\u884c\u7684\u5730\u5740，\u5176\u6570\u503c\u548c\u7b2c\u4e8c\u884c\u7b2c\u4e00\u5217\u7684\u5730\u5740\u5373&a[1][0]\u4e00\u6837，\u4f46\u662f\u542b\u4e49\u4e0d\u4e00\u6837\u3002<\/span><\/p>\n

    2. \u5217\u5730\u5740<\/span><\/p>\n

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