{"id":3334,"date":"2025-03-29T17:18:03","date_gmt":"2025-03-29T09:18:03","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3334"},"modified":"2025-03-29T17:18:03","modified_gmt":"2025-03-29T09:18:03","slug":"c-%e4%bf%a1%e5%8f%b7%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/29\/c-%e4%bf%a1%e5%8f%b7%e5%a4%84%e7%90%86\/","title":{"rendered":"C++ \u4fe1\u53f7\u5904\u7406"},"content":{"rendered":"\n

\u4fe1\u53f7\u5904\u7406\u5728 C++ \u4e2d\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u7528\u4e8e\u5904\u7406\u7cfb\u7edf\u6216\u7a0b\u5e8f\u53d1\u9001\u7684\u4fe1\u53f7\u3002\u4fe1\u53f7\u662f\u64cd\u4f5c\u7cfb\u7edf\u5411\u8fdb\u7a0b\u53d1\u9001\u7684\u4e00\u79cd\u5f02\u6b65\u901a\u77e5\uff0c\u901a\u5e38\u7528\u4e8e\u901a\u77e5\u7a0b\u5e8f\u53d1\u751f\u4e86\u67d0\u4e9b\u4e8b\u4ef6\uff08\u5982\u8fdb\u7a0b\u7ec8\u6b62\u3001\u975e\u6cd5\u5185\u5b58\u8bbf\u95ee\u7b49\uff09\u3002C++ \u63d0\u4f9b\u4e86\u4fe1\u53f7\u5904\u7406\u673a\u5236\uff0c\u901a\u8fc7\u4f7f\u7528 signal<\/code> \u51fd\u6570\u548c\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u7a0b\u5e8f\u53ef\u4ee5\u6355\u6349\u548c\u5904\u7406\u8fd9\u4e9b\u4fe1\u53f7\u3002<\/p>\n\n\n\n

1. \u4fe1\u53f7\u7684\u57fa\u672c\u6982\u5ff5<\/strong><\/h2>\n\n\n\n

\u4fe1\u53f7\u662f\u4e00\u79cd\u5f02\u6b65\u901a\u77e5\uff0c\u901a\u5e38\u7531\u64cd\u4f5c\u7cfb\u7edf\u53d1\u51fa\uff0c\u6307\u793a\u67d0\u4e2a\u4e8b\u4ef6\u7684\u53d1\u751f\u3002\u5e38\u89c1\u7684\u4fe1\u53f7\u6709\uff1a<\/p>\n\n\n\n

    \n
  • SIGINT<\/strong>\uff1a\u4e2d\u65ad\u4fe1\u53f7\uff0c\u901a\u5e38\u662f\u7528\u6237\u6309\u4e0b Ctrl+C<\/code> \u65f6\u53d1\u51fa\u7684\u4fe1\u53f7\u3002<\/li>\n\n\n\n
  • SIGTERM<\/strong>\uff1a\u7ec8\u6b62\u4fe1\u53f7\uff0c\u7528\u4e8e\u8bf7\u6c42\u7a0b\u5e8f\u6b63\u5e38\u9000\u51fa\u3002<\/li>\n\n\n\n
  • SIGSEGV<\/strong>\uff1a\u6bb5\u9519\u8bef\u4fe1\u53f7\uff0c\u7a0b\u5e8f\u8bd5\u56fe\u8bbf\u95ee\u65e0\u6548\u5185\u5b58\u65f6\u53d1\u9001\u3002<\/li>\n\n\n\n
  • SIGABRT<\/strong>\uff1a\u7a0b\u5e8f\u5f02\u5e38\u7ec8\u6b62\u4fe1\u53f7\uff0c\u901a\u5e38\u7531\u7a0b\u5e8f\u5185\u90e8\u8c03\u7528 abort()<\/code> \u51fd\u6570\u5f15\u53d1\u3002<\/li>\n\n\n\n
  • SIGFPE<\/strong>\uff1a\u6d6e\u70b9\u5f02\u5e38\u4fe1\u53f7\uff0c\u901a\u5e38\u7531\u4e8e\u9664\u96f6\u7b49\u9519\u8bef\u5f15\u53d1\u3002<\/li>\n<\/ul>\n\n\n\n

    2. \u4f7f\u7528 signal<\/code> \u51fd\u6570\u8bbe\u7f6e\u4fe1\u53f7\u5904\u7406\u51fd\u6570<\/strong><\/h2>\n\n\n\n

    \u5728 C++ \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 signal()<\/code> \u51fd\u6570\u6765\u8bbe\u7f6e\u4fe1\u53f7\u5904\u7406\u7a0b\u5e8f\u3002\u5f53\u67d0\u4e2a\u4fe1\u53f7\u53d1\u751f\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u8c03\u7528\u5bf9\u5e94\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002<\/p>\n\n\n\n

    \u8bed\u6cd5\uff1a<\/strong><\/h3>\n\n\n\n
    #include <csignal>\n#include <iostream>\nusing namespace std;\n\nvoid signal_handler(int signal) {\n    cout << \"Signal \" << signal << \" received!\" << endl;\n}\n\nint main() {\n    signal(SIGINT, signal_handler);  \/\/ \u8bbe\u7f6e SIGINT \u7684\u5904\u7406\u51fd\u6570\n    cout << \"Press Ctrl+C to generate SIGINT signal...\" << endl;\n\n    while (true);  \/\/ \u65e0\u9650\u5faa\u73af\u7b49\u5f85\u4fe1\u53f7\n    return 0;\n}<\/code><\/pre>\n\n\n\n
    \u8f93\u51fa\uff1a<\/strong><\/h3>\n\n\n\n
    Press Ctrl+C to generate SIGINT signal...\nSignal 2 received!  \/\/ \u5f53\u6309\u4e0b Ctrl+C \u65f6\uff0c\u4f1a\u89e6\u53d1\u4fe1\u53f7\u5e76\u8c03\u7528 signal_handler \u51fd\u6570<\/code><\/pre>\n\n\n\n
    \u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
      \n
    • signal(SIGINT, signal_handler)<\/code> \u5c06\u4fe1\u53f7 SIGINT<\/code> \u4e0e\u81ea\u5b9a\u4e49\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570 signal_handler<\/code> \u5173\u8054\u3002<\/li>\n\n\n\n
    • \u5f53\u7528\u6237\u6309\u4e0b Ctrl+C<\/code> \u65f6\uff0c\u7a0b\u5e8f\u4f1a\u6355\u83b7 SIGINT<\/code> \u4fe1\u53f7\uff0c\u5e76\u8c03\u7528 signal_handler<\/code> \u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
      3. \u4fe1\u53f7\u5904\u7406\u7684\u7c7b\u578b<\/strong><\/h2>\n\n\n\n
      \u4fe1\u53f7\u5904\u7406\u51fd\u6570\u53ef\u4ee5\u6709\u4e0d\u540c\u7684\u884c\u4e3a\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u548c\u4fe1\u53f7\u7c7b\u578b\u3002\u53ef\u4ee5\u901a\u8fc7 signal()<\/code> \u51fd\u6570\u6765\u8bbe\u7f6e\u4ee5\u4e0b\u884c\u4e3a\uff1a<\/p>\n\n\n\n
        \n
      • \u9ed8\u8ba4\u884c\u4e3a<\/strong>\uff1a\u4fe1\u53f7\u53d1\u751f\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u6267\u884c\u9ed8\u8ba4\u64cd\u4f5c\uff08\u5982\u7ec8\u6b62\u7a0b\u5e8f\u3001\u5ffd\u7565\u4fe1\u53f7\u7b49\uff09\u3002<\/li>\n\n\n\n
      • \u5ffd\u7565\u4fe1\u53f7<\/strong>\uff1a\u901a\u8fc7\u5c06\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u8bbe\u7f6e\u4e3a SIG_IGN<\/code>\uff0c\u53ef\u4ee5\u5ffd\u7565\u67d0\u4e2a\u4fe1\u53f7\u3002<\/li>\n\n\n\n
      • \u81ea\u5b9a\u4e49\u5904\u7406<\/strong>\uff1a\u901a\u8fc7\u6307\u5b9a\u81ea\u5b9a\u4e49\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u7a0b\u5e8f\u53ef\u4ee5\u5bf9\u4fe1\u53f7\u505a\u51fa\u54cd\u5e94\u3002<\/li>\n<\/ul>\n\n\n\n
        \u8bbe\u7f6e\u5ffd\u7565\u4fe1\u53f7<\/strong><\/h3>\n\n\n\n
        #include <csignal>\n#include <iostream>\nusing namespace std;\n\nint main() {\n    signal(SIGINT, SIG_IGN);  \/\/ \u5ffd\u7565 SIGINT \u4fe1\u53f7\n\n    cout << \"Press Ctrl+C to generate SIGINT signal (It will be ignored)...\" << endl;\n\n    while (true);  \/\/ \u65e0\u9650\u5faa\u73af\u7b49\u5f85\u4fe1\u53f7\n    return 0;\n}<\/code><\/pre>\n\n\n\n
        \u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
          \n
        • \u901a\u8fc7 signal(SIGINT, SIG_IGN)<\/code>\uff0c\u7a0b\u5e8f\u5ffd\u7565 SIGINT<\/code> \u4fe1\u53f7\u3002<\/li>\n\n\n\n
        • \u5f53\u7528\u6237\u6309\u4e0b Ctrl+C<\/code> \u65f6\uff0c\u4fe1\u53f7\u88ab\u5ffd\u7565\uff0c\u7a0b\u5e8f\u7ee7\u7eed\u8fd0\u884c\u3002<\/li>\n<\/ul>\n\n\n\n
          \u6062\u590d\u9ed8\u8ba4\u884c\u4e3a<\/strong><\/h3>\n\n\n\n
          #include <csignal>\n#include <iostream>\nusing namespace std;\n\nvoid signal_handler(int signal) {\n    cout << \"Signal \" << signal << \" received!\" << endl;\n}\n\nint main() {\n    signal(SIGINT, signal_handler);  \/\/ \u8bbe\u7f6e\u4fe1\u53f7\u5904\u7406\u51fd\u6570\n    cout << \"Press Ctrl+C to generate SIGINT signal...\" << endl;\n\n    signal(SIGINT, SIG_DFL);  \/\/ \u6062\u590d SIGINT \u7684\u9ed8\u8ba4\u884c\u4e3a\n    while (true);  \/\/ \u65e0\u9650\u5faa\u73af\u7b49\u5f85\u4fe1\u53f7\n    return 0;\n}<\/code><\/pre>\n\n\n\n
          \u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
            \n
          • signal(SIGINT, SIG_DFL)<\/code> \u6062\u590d SIGINT<\/code> \u4fe1\u53f7\u7684\u9ed8\u8ba4\u884c\u4e3a\uff08\u7a0b\u5e8f\u7ec8\u6b62\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
            4. \u5e38\u89c1\u7684\u4fe1\u53f7\u5904\u7406\u793a\u4f8b<\/strong><\/h2>\n\n\n\n
            \u5904\u7406 SIGTERM<\/code> \u4fe1\u53f7<\/strong><\/h3>\n\n\n\n
            #include <csignal>\n#include <iostream>\nusing namespace std;\n\nvoid handle_term(int signum) {\n    cout << \"Received SIGTERM signal. Program will terminate now.\" << endl;\n    exit(0);  \/\/ \u6b63\u5e38\u9000\u51fa\u7a0b\u5e8f\n}\n\nint main() {\n    signal(SIGTERM, handle_term);  \/\/ \u8bbe\u7f6e SIGTERM \u7684\u5904\u7406\u51fd\u6570\n    cout << \"Waiting for SIGTERM signal...\" << endl;\n\n    while (true);  \/\/ \u65e0\u9650\u5faa\u73af\u7b49\u5f85\u4fe1\u53f7\n    return 0;\n}<\/code><\/pre>\n\n\n\n
            \u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
              \n
            • \u5f53\u7a0b\u5e8f\u63a5\u6536\u5230 SIGTERM<\/code> \u4fe1\u53f7\u65f6\uff0c\u8c03\u7528 handle_term<\/code> \u51fd\u6570\uff0c\u8f93\u51fa\u4e00\u6761\u4fe1\u606f\u5e76\u9000\u51fa\u7a0b\u5e8f\u3002<\/li>\n<\/ul>\n\n\n\n
              \u5904\u7406 SIGSEGV<\/code> \u4fe1\u53f7\uff08\u6bb5\u9519\u8bef\uff09<\/strong><\/h3>\n\n\n\n
              #include <csignal>\n#include <iostream>\nusing namespace std;\n\nvoid handle_segv(int signum) {\n    cout << \"Received SIGSEGV signal (Segmentation Fault).\" << endl;\n    exit(1);  \/\/ \u9000\u51fa\u7a0b\u5e8f\n}\n\nint main() {\n    signal(SIGSEGV, handle_segv);  \/\/ \u8bbe\u7f6e SIGSEGV \u7684\u5904\u7406\u51fd\u6570\n    cout << \"Generating segmentation fault...\" << endl;\n\n    int* ptr = nullptr;\n    *ptr = 42;  \/\/ \u5f15\u53d1\u6bb5\u9519\u8bef(SIGSEGV)\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n
              \u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
                \n
              • \u901a\u8fc7 signal(SIGSEGV, handle_segv)<\/code>\uff0c\u6355\u83b7 SIGSEGV<\/code>\uff08\u6bb5\u9519\u8bef\uff09\u4fe1\u53f7\uff0c\u5f53\u7a0b\u5e8f\u8bd5\u56fe\u8bbf\u95ee\u975e\u6cd5\u5185\u5b58\u65f6\u89e6\u53d1\u3002<\/li>\n<\/ul>\n\n\n\n
                5. \u4fe1\u53f7\u5904\u7406\u7684\u6ce8\u610f\u4e8b\u9879<\/strong><\/h2>\n\n\n\n
                  \n
                • \u5f02\u6b65\u4fe1\u53f7<\/strong>\uff1a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u662f\u5728\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u5f02\u6b65\u8c03\u7528\u7684\uff0c\u56e0\u6b64\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5e94\u907f\u514d\u6267\u884c\u590d\u6742\u7684\u64cd\u4f5c\uff08\u5982\u5185\u5b58\u5206\u914d\u3001\u6587\u4ef6I\/O\u7b49\uff09\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6b7b\u9501\u6216\u4e0d\u786e\u5b9a\u6027\u3002<\/li>\n\n\n\n
                • \u4fe1\u53f7\u53ef\u4e2d\u65ad<\/strong>\uff1a\u67d0\u4e9b\u64cd\u4f5c\u7cfb\u7edf\u548c\u4fe1\u53f7\u7c7b\u578b\u53ef\u80fd\u4f1a\u4e2d\u65ad\u6b63\u5728\u6267\u884c\u7684\u64cd\u4f5c\uff0c\u56e0\u6b64\u8981\u5c0f\u5fc3\u4fe1\u53f7\u548c\u7a0b\u5e8f\u7684\u5176\u4ed6\u90e8\u5206\u7684\u4ea4\u4e92\u3002<\/li>\n\n\n\n
                • \u7ebf\u7a0b\u4e0e\u4fe1\u53f7<\/strong>\uff1a\u5728\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u4e2d\uff0c\u4fe1\u53f7\u53ea\u4f1a\u4f20\u9012\u7ed9\u4e3b\u7ebf\u7a0b\u6216\u7279\u5b9a\u7ebf\u7a0b\uff0c\u56e0\u6b64\u8981\u786e\u4fdd\u9002\u5f53\u7684\u7ebf\u7a0b\u5904\u7406\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n\n\n\n
                  6. \u5c0f\u7ed3<\/strong><\/h2>\n\n\n\n
                  C++ \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u4fe1\u53f7\u5904\u7406\u673a\u5236\uff0c\u5141\u8bb8\u7a0b\u5e8f\u901a\u8fc7 signal<\/code> \u51fd\u6570\u6355\u83b7\u5e76\u54cd\u5e94\u64cd\u4f5c\u7cfb\u7edf\u53d1\u9001\u7684\u4fe1\u53f7\u3002\u901a\u8fc7\u81ea\u5b9a\u4e49\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u53ef\u4ee5\u5904\u7406\u5f02\u5e38\u60c5\u51b5\u3001\u6e05\u7406\u8d44\u6e90\u6216\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002\u4fe1\u53f7\u5904\u7406\u5728\u8fdb\u884c\u8fdb\u7a0b\u7ba1\u7406\u3001\u5f02\u5e38\u5904\u7406\u7b49\u65b9\u9762\u5177\u6709\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                  \u4fe1\u53f7\u5904\u7406\u5728 C++ \u4e2d\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u7528\u4e8e\u5904\u7406\u7cfb\u7edf\u6216\u7a0b\u5e8f\u53d1\u9001\u7684\u4fe1\u53f7\u3002\u4fe1\u53f7\u662f\u64cd\u4f5c\u7cfb\u7edf\u5411\u8fdb\u7a0b\u53d1\u9001\u7684\u4e00\u79cd\u5f02\u6b65\u901a\u77e5 […]<\/p>\n","protected":false},"author":1,"featured_media":3335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[81],"tags":[],"class_list":["post-3334","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3334","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3334"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3334\/revisions"}],"predecessor-version":[{"id":3336,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3334\/revisions\/3336"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3335"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}