{"id":325,"date":"2024-02-12T15:13:32","date_gmt":"2024-02-12T07:13:32","guid":{"rendered":"https:\/\/hsiang.cc\/?p=325"},"modified":"2024-07-30T16:28:10","modified_gmt":"2024-07-30T08:28:10","slug":"325","status":"publish","type":"post","link":"https:\/\/hsiang.cc\/?p=325","title":{"rendered":"\u63a2\u8a0eC\u8a9e\u8a00\u7684\u547c\u53eb\u65b9\u5f0f\uff1aCall by Address"},"content":{"rendered":"

\u5728\u8a0e\u8ad6C\u8a9e\u8a00\u7684\u547c\u53eb\u65b9\u5f0f\u6642\uff0c\u6211\u5011\u5e38\u5e38\u6703\u807d\u5230\u300cCall by Value\u300d\u8207\u300cCall by Reference\u300d\u9019\u5169\u500b\u8853\u8a9e\u3002\u6709\u4e9b\u4eba\u53ef\u80fd\u6703\u554f\uff0cC\u8a9e\u8a00\u6709\u6c92\u6709\u300cCall by Address\u300d\uff1f\u9019\u500b\u554f\u984c\u5176\u5be6\u8207\u300cCall by Reference\u300d\u6709\u5bc6\u5207\u7684\u95dc\u806f\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u300cCall by Value\u300d\u8207\u300cCall by Reference\u300d\uff1f<\/h4>\n

\u5728\u4e86\u89e3\u300cCall by Address\u300d\u4e4b\u524d\uff0c\u6211\u5011\u5148\u4f86\u8907\u7fd2\u4e00\u4e0b\u300cCall by Value\u300d\u8207\u300cCall by Reference\u300d\u3002<\/p>\n

<\/p>\n

    \n
  1. \n

    Call by Value<\/strong>\uff1a\u5728C\u8a9e\u8a00\u4e2d\uff0c\u51fd\u6578\u547c\u53eb\u6642\uff0c\u5be6\u969b\u4e0a\u662f\u5c07\u8b8a\u6578\u7684\u503c\u8907\u88fd\u4e00\u4efd\uff0c\u7136\u5f8c\u50b3\u905e\u7d66\u51fd\u6578\u3002\u5728\u51fd\u6578\u5167\u90e8\u5c0d\u8b8a\u6578\u7684\u4fee\u6539\u4e0d\u6703\u5f71\u97ff\u5230\u5916\u90e8\u7684\u8b8a\u6578\u3002<\/p>\n

    void foo(int x) {\n    x = 10;\n}\n\nint main() {\n    int a = 5;\n    foo(a);\n    \/\/ \u6b64\u6642\uff0ca \u4ecd\u7136\u662f 5\n}<\/code><\/pre>\n<\/li>\n
  2. \n
    Call by Reference<\/strong>\uff1a\u9019\u7a2e\u547c\u53eb\u65b9\u5f0f\u5c07\u8b8a\u6578\u7684\u53c3\u8003\uff08\u901a\u5e38\u662f\u5730\u5740\uff09\u50b3\u905e\u7d66\u51fd\u6578\u3002\u9019\u6a23\uff0c\u51fd\u6578\u5167\u90e8\u5c0d\u8b8a\u6578\u7684\u64cd\u4f5c\u5c07\u5f71\u97ff\u5230\u5916\u90e8\u7684\u8b8a\u6578\u3002\u5728C\u8a9e\u8a00\u4e2d\uff0c\u76f4\u63a5\u652f\u63f4\u300cCall by Reference\u300d\u7684\u8a9e\u8a00\u6a5f\u5236\u4e26\u4e0d\u5b58\u5728\uff0c\u4f46\u53ef\u4ee5\u901a\u904e\u6307\u6a19\u4f86\u5be6\u73fe\u985e\u4f3c\u7684\u6548\u679c\u3002<\/p>\n
    void foo(int *x) {\n    *x = 10;\n}\n\nint main() {\n    int a = 5;\n    foo(&a);\n    \/\/ \u6b64\u6642\uff0ca \u8b8a\u70ba 10\n}<\/code><\/pre>\n<\/li>\n<\/ol>\n
    \u300cCall by Address\u300d\u662f\u4ec0\u9ebc\uff1f<\/h4>\n
    \u56b4\u683c\u4f86\u8aaa\uff0c\u300cCall by Address\u300d\u4e26\u4e0d\u662f\u4e00\u500b\u6b63\u5f0f\u7684\u8853\u8a9e\uff0c\u4f46\u5b83\u901a\u5e38\u7528\u4f86\u63cf\u8ff0C\u8a9e\u8a00\u4e2d\u901a\u904e\u6307\u6a19\u50b3\u905e\u53c3\u6578\u7684\u60c5\u6cc1\uff0c\u9019\u5be6\u969b\u4e0a\u5c31\u662f\u300cCall by Reference\u300d\u7684\u4e00\u7a2e\u8868\u73fe\u5f62\u5f0f\u3002<\/p>\n
    \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cfoo(&a);<\/code> \u5c31\u662f\u901a\u904e\u5730\u5740\uff08address\uff09\u4f86\u547c\u53eb\u51fd\u6578\uff0c\u4f7f\u5f97\u51fd\u6578\u53ef\u4ee5\u64cd\u4f5c\u539f\u8b8a\u6578\u7684\u503c\u3002\u5f9e\u9019\u500b\u89d2\u5ea6\u4f86\u770b\uff0c\u300cCall by Address\u300d\u8207\u300cCall by Reference\u300d\u5728C\u8a9e\u8a00\u4e2d\u53ef\u4ee5\u8a8d\u70ba\u662f\u540c\u7fa9\u7684\u3002<\/p>\n
    \u70ba\u4ec0\u9ebc\u4f7f\u7528\u300cCall by Address\u300d\uff1f<\/h4>\n
    \u4f7f\u7528\u300cCall by Address\u300d\u6709\u5e7e\u500b\u4e3b\u8981\u539f\u56e0\uff1a<\/p>\n
      \n
    1. \n
      \u7bc0\u7701\u8a18\u61b6\u9ad4<\/strong>\uff1a\u7576\u50b3\u905e\u5927\u578b\u7d50\u69cb\u9ad4\u6216\u9663\u5217\u6642\uff0c\u50b3\u905e\u6307\u6a19\u800c\u4e0d\u662f\u6574\u500b\u8cc7\u6599\u53ef\u4ee5\u7bc0\u7701\u8a18\u61b6\u9ad4\u3002<\/p>\n<\/li>\n
    2. \n
      \u5141\u8a31\u4fee\u6539\u5be6\u969b\u53c3\u6578<\/strong>\uff1a\u901a\u904e\u6307\u6a19\u53ef\u4ee5\u5728\u51fd\u6578\u5167\u90e8\u4fee\u6539\u539f\u8b8a\u6578\uff0c\u9019\u5c0d\u67d0\u4e9b\u61c9\u7528\u5834\u666f\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<\/li>\n
    3. \n
      \u63d0\u9ad8\u6548\u7387<\/strong>\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u50b3\u905e\u6307\u6a19\u6bd4\u50b3\u905e\u503c\u66f4\u9ad8\u6548\uff0c\u5c24\u5176\u662f\u5728\u5927\u578b\u6578\u64da\u7d50\u69cb\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<\/li>\n<\/ol>\n
      \u7d50\u8ad6<\/h4>\n
      C\u8a9e\u8a00\u672c\u8eab\u4e0d\u76f4\u63a5\u652f\u63f4\u300cCall by Reference\u300d\uff0c\u4f46\u901a\u904e\u6307\u6a19\u53ef\u4ee5\u5be6\u73fe\u985e\u4f3c\u7684\u529f\u80fd\uff0c\u9019\u5c31\u662f\u6240\u8b02\u7684\u300cCall by Address\u300d\u3002\u9019\u7a2e\u65b9\u5f0f\u5141\u8a31\u5728\u51fd\u6578\u5167\u90e8\u4fee\u6539\u5be6\u969b\u8b8a\u6578\uff0c\u7bc0\u7701\u8a18\u61b6\u9ad4\u4e26\u63d0\u9ad8\u6548\u7387\u3002\u7406\u89e3\u4e26\u9748\u6d3b\u904b\u7528\u9019\u7a2e\u6a5f\u5236\u5c0d\u65bcC\u8a9e\u8a00\u7a0b\u5f0f\u8a2d\u8a08\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n
      \u5e0c\u671b\u9019\u7bc7\u6587\u7ae0\u80fd\u5920\u5e6b\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3C\u8a9e\u8a00\u4e2d\u7684\u547c\u53eb\u65b9\u5f0f\u3002\u5982\u679c\u4f60\u6709\u4efb\u4f55\u554f\u984c\u6216\u9700\u8981\u9032\u4e00\u6b65\u7684\u89e3\u91cb\uff0c\u6b61\u8fce\u96a8\u6642\u63d0\u554f\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5728\u8a0e\u8ad6C\u8a9e\u8a00\u7684\u547c\u53eb\u65b9\u5f0f\u6642\uff0c\u6211\u5011\u5e38\u5e38\u6703\u807d\u5230\u300cCall by Value\u300d\u8207\u300cCal … \u95b1\u8b80\u5168\u6587 →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[15],"tags":[363,362,361,364,369,372,365,373,367,370,374,371,368,376,366,375],"class_list":["post-325","post","type-post","status-publish","format-standard","hentry","category-prog","tag-call-by-address","tag-call-by-reference","tag-call-by-value","tag-c","tag-369","tag-372","tag-365","tag-373","tag-367","tag-370","tag-374","tag-371","tag-368","tag-376","tag-366","tag-375"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=325"}],"version-history":[{"count":4,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/325\/revisions"}],"predecessor-version":[{"id":332,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/325\/revisions\/332"}],"wp:attachment":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}