{"id":48122,"date":"2025-07-30T10:47:07","date_gmt":"2025-07-30T02:47:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/48122.html"},"modified":"2025-07-30T10:47:07","modified_gmt":"2025-07-30T02:47:07","slug":"%e4%bb%8ec0%e5%9f%ba%e7%a1%80%e5%88%b0c%e5%85%a5%e9%97%a8%ef%bc%88%e7%ac%ac%e5%85%ab%e8%8a%82%ef%bc%9a%e7%ae%97%e6%95%b0%e8%bf%90%e7%ae%97%e7%ac%a6%e3%80%90%e5%8f%96%e6%a8%a1%e8%bf%90%e7%ae%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/48122.html","title":{"rendered":"\u4eceC++0\u57fa\u7840\u5230C++\u5165\u95e8\uff08\u7b2c\u516b\u8282\uff1a\u7b97\u6570\u8fd0\u7b97\u7b26\u3010\u53d6\u6a21\u8fd0\u7b97 %\u3011\uff09"},"content":{"rendered":"

\u00a0（\u548c\u4e4b\u524d\u4e00\u6837，\u521d\u5b66\u8005\u53ea\u9700\u5b66\u4e60\u7ea2\u8272\u5b57\u4f53<\/span>\u5373\u53ef）<\/p>\n

\u00a01. \u53d6\u6a21\u8fd0\u7b97<\/h2>\n<\/p>\n

\u00a0 1.1 \u3010%\u3011\u7684\u57fa\u672c\u6982\u5ff5<\/span><\/h3>\n

\u53d6\u6a21\u8fd0\u7b97\u7b26（%）\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u76f8\u9664\u540e\u7684\u4f59\u6570\u3002\u5176\u8bed\u6cd5\u5f62\u5f0f\u4e3a a % b，\u5176\u4e2d a \u662f\u88ab\u9664\u6570，b \u662f\u9664\u6570\u3002\u7ed3\u679c\u7684\u7b26\u53f7\u4e0e\u88ab\u9664\u6570 a \u7684\u7b26\u53f7\u4e00\u81f4\u3002<\/p>\n

\u00a0<\/p>\n

\u00a0 1.2\u00a0 \u8fd0\u7b97\u7684\u89c4\u5219<\/span><\/h3>\n
    \n
  • \u5f53 a \u548c b \u5747\u4e3a\u6b63\u6570\u65f6，\u7ed3\u679c\u4e3a a \u9664\u4ee5 b \u7684\u4f59\u6570\u3002<\/li>\n
  • \u5f53 a \u4e3a\u8d1f\u6570\u65f6，\u7ed3\u679c\u4e3a a \u9664\u4ee5 b \u7684\u4f59\u6570，\u4f46\u7b26\u53f7\u4e0e a \u76f8\u540c<\/span><\/li>\n
  • \u5f53 b \u4e3a\u8d1f\u6570\u65f6，\u7ed3\u679c\u4e0e b \u4e3a\u6b63\u6570\u65f6\u76f8\u540c\u3002<\/span><\/li>\n<\/ul>\n

    \u793a\u4f8b：<\/p>\n

    int x = 10 % 3; \/\/ \u7ed3\u679c\u4e3a 1
    \nint y = -10 % 3; \/\/ \u7ed3\u679c\u4e3a -1
    \nint z = 10 % -3; \/\/ \u7ed3\u679c\u4e3a 1<\/p>\n

    \u00a0<\/p>\n

    1.3 \u53d6\u6a21\u8fd0\u7b97\u7684\u5e94\u7528\u573a\u666f<\/span><\/h3>\n
  • \n

    \u5224\u65ad\u5947\u5076\u6027：<\/span>\u901a\u8fc7 n % 2 \u662f\u5426\u4e3a 0 \u5224\u65ad n \u662f\u5426\u4e3a\u5076\u6570\u3002<\/p>\n

    if (n % 2 == 0) {
    \n \/\/ n \u662f\u5076\u6570
    \n}<\/p>\n<\/li>\n

  • \n

    \u5faa\u73af\u5468\u671f\u6027\u64cd\u4f5c<\/span>：\u4f8b\u5982，\u5faa\u73af\u904d\u5386\u6570\u7ec4\u65f6，\u4f7f\u7528\u53d6\u6a21\u5b9e\u73b0\u5faa\u73af\u7d22\u5f15\u3002<\/p>\n

    int index = current_index % array_size;<\/p>\n<\/li>\n

  • \n

    \u6570\u5b57\u62c6\u5206：<\/span>\u63d0\u53d6\u6570\u5b57\u7684\u67d0\u4e00\u4f4d\u3002<\/p>\n

    int last_digit = number % 10; \/\/ \u83b7\u53d6\u4e2a\u4f4d\u6570<\/p>\n<\/li>\n

    \u6ce8\u610f：<\/span><\/h4>\n
      \n
    • \u9664\u6570 b \u4e0d\u80fd\u4e3a 0<\/span>，\u5426\u5219\u4f1a\u5bfc\u81f4\u8fd0\u884c\u65f6\u9519\u8bef（\u9664\u4ee5\u96f6\u5f02\u5e38）\u3002<\/li>\n
    • \u53d6\u6a21\u8fd0\u7b97\u4ec5\u9002\u7528\u4e8e\u6574\u6570\u7c7b\u578b（int\u3001long \u7b49），\u6d6e\u70b9\u6570\u9700\u4f7f\u7528 fmod \u51fd\u6570<\/span>\u3002<\/li>\n
    • \u7ed3\u679c\u7684\u7b26\u53f7\u53ef\u80fd\u56e0\u7f16\u8bd1\u5668\u5b9e\u73b0\u4e0d\u540c\u800c\u6709\u6240\u5dee\u5f02（C++11 \u6807\u51c6\u5df2\u7edf\u4e00\u884c\u4e3a）\u3002<\/li>\n<\/ul>\n

      \u00a0<\/p>\n

      \u00a02. \u8fdb\u9636：<\/h2>\n

      2.1\u6d6e\u70b9\u6570\u53d6\u6a21\u8fd0\u7b97<\/h3>\n

      \u5bf9\u4e8e\u6d6e\u70b9\u6570，\u9700\u4f7f\u7528 <cmath> \u4e2d\u7684 fmod \u51fd\u6570<\/span>：<\/p>\n

      #include <cmath>
      \ndouble result = fmod(10.5, 3.2); \/\/ \u7ed3\u679c\u4e3a 10.5 – 3*3.2 = 0.9<\/p>\n

      \u00a0 \u4ee3\u7801\u793a\u4f8b<\/h4>\n

      \u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b，\u5c55\u793a\u53d6\u6a21\u8fd0\u7b97\u7684\u591a\u79cd\u7528\u6cd5：<\/p>\n

      #include <iostream>
      \n#include <cmath>
      \nusing namespace std;<\/p>\n

      int main() {
      \n \/\/ \u6574\u6570\u53d6\u6a21
      \n cout << "10 % 3 = " << 10 % 3 << endl;
      \n cout << "-10 % 3 = " << -10 % 3 << endl;
      \n cout << "10 % -3 = " << 10 % -3 << endl;<\/p>\n

      \/\/ \u5224\u65ad\u5947\u5076\u6027
      \n int num = 7;
      \n if (num % 2 == 0) {
      \n cout << num << " is even." << endl;
      \n } else {
      \n cout << num << " is odd." << endl;
      \n }<\/p>\n

      \/\/ \u6d6e\u70b9\u6570\u53d6\u6a21
      \n double a = 10.5, b = 3.2;
      \n cout << "fmod(10.5, 3.2) = " << fmod(a, b) << endl;<\/p>\n

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

      \u8f93\u51fa\u7ed3\u679c：<\/p>\n

      10 % 3 = 1
      \n-10 % 3 = -1
      \n10 % -3 = 1
      \n7 is odd.
      \nfmod(10.5, 3.2) = 0.9<\/p>\n

      （\u4f5c\u8005\u524d\u4e24\u5929\u7ecf\u5386\u4e86\u7b2c\u4e00\u6b21\u5206\u624b，\u8c03\u6574\u4e86\u4e00\u6bb5\u65f6\u95f4，\u4e0d\u591a\u8bf4\u4e86，\u8fd8\u5f97\u7ee7\u7eed\u5b66\u4e60）<\/p>\n","protected":false},"excerpt":{"rendered":"

      \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb8\u6b21\u3002\uff08\u548c\u4e4b\u524d\u4e00\u6837\uff0c\u521d\u5b66\u8005\u53ea\u9700\u5b66\u4e60\u7ea2\u8272\u5b57\u4f53\u5373\u53ef\uff09<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,174,4636,190,305],"topic":[],"class_list":{"0":"post-48122","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-server","7":"tag-c","9":"tag-c0c","10":"tag-190","11":"tag-305"},"yoast_head":"\n\u4eceC++0\u57fa\u7840\u5230C++\u5165\u95e8\uff08\u7b2c\u516b\u8282\uff1a\u7b97\u6570\u8fd0\u7b97\u7b26\u3010\u53d6\u6a21\u8fd0\u7b97 %\u3011\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/48122.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4eceC++0\u57fa\u7840\u5230C++\u5165\u95e8\uff08\u7b2c\u516b\u8282\uff1a\u7b97\u6570\u8fd0\u7b97\u7b26\u3010\u53d6\u6a21\u8fd0\u7b97 %\u3011\uff09 - 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