{"id":6719,"date":"2025-09-29T13:40:57","date_gmt":"2025-09-29T05:40:57","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=6719"},"modified":"2025-09-29T13:41:04","modified_gmt":"2025-09-29T05:41:04","slug":"ai%e9%83%a8%e7%bd%b2%e9%80%9a%e7%94%a8c%e7%9f%a5%e8%af%86%e7%82%b9-%e9%9d%a2%e8%af%95%e5%bf%85%e7%9f%a5%e5%bf%85%e4%bc%9apart2","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/c\/ai%e9%83%a8%e7%bd%b2%e9%80%9a%e7%94%a8c%e7%9f%a5%e8%af%86%e7%82%b9-%e9%9d%a2%e8%af%95%e5%bf%85%e7%9f%a5%e5%bf%85%e4%bc%9apart2\/","title":{"rendered":"AI\u90e8\u7f72\u901a\u7528C++\u77e5\u8bc6\u70b9–\u9762\u8bd5\u5fc5\u77e5\u5fc5\u4f1a(part2)"},"content":{"rendered":"\n

1. \u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f\u53ca\u5176\u7c7b\u578b<\/strong><\/h2>\n\n\n\n

\u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f\uff1f<\/strong><\/h3>\n\n\n\n

\u5185\u5b58\u6cc4\u6f0f\u662f\u6307\u7a0b\u5e8f\u5728\u52a8\u6001\u5206\u914d\u5185\u5b58\u540e\uff0c\u7531\u4e8e\u758f\u5ffd\u6216\u9519\u8bef\u9020\u6210\u4e86\u7a0b\u5e8f\u672a\u80fd\u91ca\u653e\u6389\u4e0d\u518d\u4f7f\u7528\u5185\u5b58\u7684\u60c5\u51b5\u3002\u5185\u5b58\u6cc4\u9732\u5e76\u975e\u6307\u5185\u5b58\u5728\u7269\u7406\u4e0a\u7684\u6d88\u5931\uff0c\u800c\u662f\u5e94\u7528\u7a0b\u5e8f\u5206\u914d\u6bb5\u5185\u5b58\u540e<\/strong>\uff0c\u7531\u4e8e\u8bbe\u8ba1\u9519\u8bef\uff0c\u5931\u53bb\u6765\u5bf9\u8be5\u6bb5\u5185\u5b58\u7684\u63a7\u5236<\/strong>\u3002\u867d\u7136\u5185\u5b58\u4ecd\u7136\u5b58\u5728\uff0c\u4f46\u7a0b\u5e8f\u65e0\u6cd5\u518d\u4f7f\u7528\u5b83\uff0c\u56e0\u6b64\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n\n\n\n

\u5185\u5b58\u6cc4\u6f0f\u7684\u5e38\u89c1\u7c7b\u578b<\/strong><\/h3>\n\n\n\n
    \n
  1. \u5806\u5185\u5b58\u6cc4\u6f0f\uff08Heap Leak\uff09<\/strong>\n
      \n
    • \u5806\u5185\u5b58\u662f\u901a\u8fc7\u00a0malloc<\/code>\u3001new<\/code>\u00a0\u7b49\u51fd\u6570\u5206\u914d\u7684\u5185\u5b58\u3002\u5982\u679c\u7a0b\u5e8f\u6ca1\u6709\u6b63\u786e\u91ca\u653e\u8fd9\u4e9b\u5185\u5b58\uff0c\u5c31\u4f1a\u53d1\u751f\u5806\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • \u7cfb\u7edf\u8d44\u6e90\u6cc4\u6f0f\uff08Resource Leak\uff09<\/strong>\n
        \n
      • \u7cfb\u7edf\u8d44\u6e90\uff08\u5982\u6587\u4ef6\u53e5\u67c4\u3001socket\u3001\u4f4d\u56fe\u7b49\uff09\u672a\u80fd\u53ca\u65f6\u91ca\u653e\uff0c\u5bfc\u81f4\u7cfb\u7edf\u8d44\u6e90\u6d6a\u8d39\uff0c\u5f71\u54cd\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • \u57fa\u7c7b\u6790\u6784\u51fd\u6570\u672a\u5b9a\u4e49\u4e3a\u865a\u51fd\u6570<\/strong>\u4e3e\u4f8b\uff1a<\/strong>class\u00a0Base\u00a0{
        public:
        \u00a0 \u00a0 ~Base() {
        \u00a0 \u00a0 \u00a0 \u00a0\u00a0cout\u00a0<<\u00a0\"Base destructor called\"\u00a0<<\u00a0endl;
        \u00a0 \u00a0 }
        };

        class\u00a0Derived\u00a0:public\u00a0Base {
        public:
        \u00a0 \u00a0 ~Derived() {
        \u00a0 \u00a0 \u00a0 \u00a0\u00a0cout\u00a0<<\u00a0\"Derived destructor called\"\u00a0<<\u00a0endl;
        \u00a0 \u00a0 }
        };

        int\u00a0main()\u00a0{
        \u00a0 \u00a0 Base* basePtr =\u00a0new\u00a0Derived();
        \u00a0 \u00a0\u00a0delete\u00a0basePtr; \u00a0\/\/ \u9519\u8bef\uff1a\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u4e0d\u662f\u865a\u51fd\u6570\uff0c\u53ea\u4f1a\u8c03\u7528Base\u7684\u6790\u6784\u51fd\u6570<\/em>
        \u00a0 \u00a0\u00a0return0;
        }
        <\/code>\u89e3\u51b3\u65b9\u6cd5<\/strong>\uff1a\u5c06\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u58f0\u660e\u4e3a\u865a\u51fd\u6570\uff0c\u786e\u4fdd\u6d3e\u751f\u7c7b\u7684\u8d44\u6e90\u4e5f\u80fd\u6b63\u786e\u91ca\u653e\u3002class\u00a0Base\u00a0{
        public:
        \u00a0 \u00a0\u00a0virtual\u00a0~Base() { \u00a0\/\/ \u865a\u6790\u6784\u51fd\u6570<\/em>
        \u00a0 \u00a0 \u00a0 \u00a0\u00a0cout\u00a0<<\u00a0\"Base destructor called\"\u00a0<<\u00a0endl;
        \u00a0 \u00a0 }
        };<\/code>\n
          \n
        • \u5982\u679c\u57fa\u7c7b\u7684\u6790\u6784\u51fd\u6570\u4e0d\u662f\u865a\u51fd\u6570\uff0c\u7a0b\u5e8f\u4f1a\u5931\u53bb\u5bf9\u6d3e\u751f\u7c7b\u8d44\u6e90\u7684\u6b63\u786e\u91ca\u653e\uff0c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • \u91ca\u653e\u5bf9\u8c61\u6570\u7ec4\u65f6\u4f7f\u7528\u4e86\u00a0delete<\/code>\u00a0\u800c\u4e0d\u662f\u00a0delete[]<\/code><\/strong>\n
            \n
          • \u5982\u679c\u4f7f\u7528\u00a0delete<\/code>\u00a0\u6765\u91ca\u653e\u5bf9\u8c61\u6570\u7ec4\uff0c\u53ea\u6709\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u4f1a\u88ab\u6790\u6784\uff0c\u5bfc\u81f4\u5269\u4f59\u7684\u5143\u7d20\u6ca1\u6709\u88ab\u91ca\u653e\uff0c\u4ece\u800c\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • \u7f3a\u5c11\u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/strong>\u4e3e\u4f8b\uff1a<\/strong>class\u00a0MyClass\u00a0{
            public:
            \u00a0 \u00a0\u00a0char* data;

            \u00a0 \u00a0 MyClass(constchar* str) {
            \u00a0 \u00a0 \u00a0 \u00a0 data =\u00a0newchar[strlen(str) +\u00a01];
            \u00a0 \u00a0 \u00a0 \u00a0\u00a0strcpy(data, str);
            \u00a0 \u00a0 }

            \u00a0 \u00a0 MyClass(const\u00a0MyClass& other) { \u00a0\/\/ \u9ed8\u8ba4\u6d45\u62f7\u8d1d<\/em>
            \u00a0 \u00a0 \u00a0 \u00a0 data = other.data; \u00a0\/\/ \u76f4\u63a5\u62f7\u8d1d\u6307\u9488\uff0c\u672a\u5206\u914d\u65b0\u5185\u5b58<\/em>
            \u00a0 \u00a0 }

            \u00a0 \u00a0 ~MyClass() {
            \u00a0 \u00a0 \u00a0 \u00a0\u00a0delete[] data; \u00a0\/\/ \u9519\u8bef\uff1a\u53cc\u91cd\u91ca\u653e<\/em>
            \u00a0 \u00a0 }
            };
            <\/code>\u89e3\u51b3\u65b9\u6cd5<\/strong>\uff1a\u5b9e\u73b0\u6df1\u62f7\u8d1d\u6784\u9020\u51fd\u6570\uff0c\u786e\u4fdd\u6bcf\u4e2a\u5bf9\u8c61\u62e5\u6709\u72ec\u7acb\u7684\u5185\u5b58\u7a7a\u95f4\u3002MyClass(const\u00a0MyClass& other) {
            \u00a0 \u00a0 data =\u00a0new\u00a0char[strlen(other.data) +\u00a01];
            \u00a0 \u00a0\u00a0strcpy(data, other.data);
            }<\/code>\n
              \n
            • \u5982\u679c\u6ca1\u6709\u6b63\u786e\u5b9e\u73b0\u62f7\u8d1d\u6784\u9020\u51fd\u6570\uff0c\u62f7\u8d1d\u5bf9\u8c61\u65f6\u53ef\u80fd\u4f1a\u4e22\u5931\u5bf9\u5185\u5b58\u7684\u63a7\u5236\uff0c\u4ece\u800c\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n

              \u5982\u4f55\u5224\u65ad\u662f\u5426\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\uff1f<\/strong><\/h3>\n\n\n\n
                \n
              1. \u4f7f\u7528\u5de5\u5177\u5982\u00a0Valgrind<\/strong>\uff08Linux \u73af\u5883\uff09\u6765\u68c0\u6d4b\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n\n\n\n
              2. \u901a\u8fc7\u624b\u52a8\u6dfb\u52a0\u5185\u5b58\u5206\u914d\u548c\u91ca\u653e\u7684\u7edf\u8ba1\u529f\u80fd\uff0c\u6765\u68c0\u67e5\u662f\u5426\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ol>\n\n\n\n

                \u5982\u4f55\u89e3\u51b3\u5185\u5b58\u6cc4\u6f0f\uff1f<\/strong><\/h3>\n\n\n\n
                  \n
                1. \u4e25\u683c\u7ba1\u7406\u5185\u5b58\u7684\u7533\u8bf7\u4e0e\u91ca\u653e\u3002<\/li>\n\n\n\n
                2. \u4f7f\u7528\u00a0\u667a\u80fd\u6307\u9488<\/strong>\uff08\u5982\u00a0std::unique_ptr<\/code>\u00a0\u6216\u00a0std::shared_ptr<\/code>\uff09\uff0c\u5b83\u4eec\u4f1a\u5728\u8d85\u51fa\u4f5c\u7528\u57df\u65f6\u81ea\u52a8\u91ca\u653e\u5185\u5b58\uff0c\u51cf\u5c11\u5185\u5b58\u6cc4\u6f0f\u7684\u98ce\u9669\u3002<\/li>\n<\/ol>\n\n\n\n
                  \n\n\n\n

                  2. new\/delete<\/code> \u4e0e malloc\/free<\/code> \u7684\u533a\u522b<\/strong><\/h2>\n\n\n\n

                  new<\/code> \u548c delete<\/code> \u7684\u7279\u70b9<\/strong><\/h3>\n\n\n\n
                    \n
                  • C++ \u5173\u952e\u5b57<\/strong>\uff1a\u00a0new<\/code>\u00a0\u548c\u00a0delete<\/code>\u00a0\u662f C++ \u7684\u5173\u952e\u5b57\uff0c\u652f\u6301\u91cd\u8f7d\u3002<\/li>\n\n\n\n
                  • \u81ea\u52a8\u8c03\u7528\u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570<\/strong>\uff1a\u00a0new<\/code>\u00a0\u548c\u00a0delete<\/code>\u00a0\u4f1a\u5206\u522b\u8c03\u7528\u5bf9\u8c61\u7684\u6784\u9020\u51fd\u6570\u548c\u6790\u6784\u51fd\u6570\uff0c\u800c\u00a0malloc<\/code>\u00a0\u548c\u00a0free<\/code>\u00a0\u53ea\u4f1a\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\uff0c\u4e0d\u6d89\u53ca\u5bf9\u8c61\u7684\u6784\u9020\u4e0e\u6790\u6784\u3002<\/li>\n\n\n\n
                  • \u5185\u5b58\u8ba1\u7b97<\/strong>\uff1a\u00a0malloc<\/code>\u00a0\u9700\u8981\u663e\u5f0f\u8ba1\u7b97\u5185\u5b58\u7684\u5927\u5c0f\uff0c\u800c\u00a0new<\/code>\u00a0\u4f1a\u81ea\u52a8\u8ba1\u7b97\u3002<\/li>\n\n\n\n
                  • \u8fd4\u56de\u7c7b\u578b<\/strong>\uff1a\u00a0malloc<\/code>\u00a0\u8fd4\u56de\u00a0void*<\/code>\u00a0\u6307\u9488\uff0c\u9700\u8981\u5f3a\u5236\u8f6c\u6362\uff0c\u800c\u00a0new<\/code>\u00a0\u8fd4\u56de\u7279\u5b9a\u7c7b\u578b\u7684\u6307\u9488\u3002<\/li>\n<\/ul>\n\n\n\n

                    malloc<\/code> \u548c free<\/code> \u7684\u7279\u70b9<\/strong><\/h3>\n\n\n\n
                      \n
                    • C \u8bed\u8a00\u5e93\u51fd\u6570<\/strong>\uff1a\u00a0malloc<\/code>\u00a0\u548c\u00a0free<\/code>\u00a0\u662f C \u8bed\u8a00\u7684\u6807\u51c6\u5e93\u51fd\u6570\uff0c\u4e0d\u80fd\u91cd\u8f7d\u3002<\/li>\n\n\n\n
                    • \u4e0d\u8c03\u7528\u6784\u9020\u4e0e\u6790\u6784\u51fd\u6570<\/strong>\uff1a\u00a0malloc<\/code>\u00a0\u548c\u00a0free<\/code>\u00a0\u53ea\u5904\u7406\u5185\u5b58\u7684\u5206\u914d\u4e0e\u91ca\u653e\uff0c\u4e0d\u5904\u7406\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u3002<\/li>\n<\/ul>\n\n\n\n
                      \n\n\n\n

                      3. \u8fd0\u884c\u65f6\u591a\u6001\u548c\u865a\u51fd\u6570<\/strong><\/h2>\n\n\n\n

                      \u591a\u6001\u7684\u6982\u5ff5<\/strong><\/h3>\n\n\n\n

                      \u591a\u6001\u662f\u6307\u540c\u4e00\u64cd\u4f5c\u4f5c\u7528\u4e8e\u4e0d\u540c\u7684\u5bf9\u8c61\u65f6\uff0c\u53ef\u4ee5\u4ea7\u751f\u4e0d\u540c\u7684\u7ed3\u679c\u3002\u4e3b\u8981\u5206\u4e3a\u9759\u6001\u591a\u6001<\/strong>\u548c\u52a8\u6001\u591a\u6001<\/strong>\u3002<\/p>\n\n\n\n

                      \u9759\u6001\u591a\u6001\uff08\u7f16\u8bd1\u65f6\u591a\u6001\uff09<\/strong><\/h3>\n\n\n\n
                        \n
                      1. \u51fd\u6570\u91cd\u8f7d<\/strong>\uff1a\u540c\u540d\u51fd\u6570\u6839\u636e\u53c2\u6570\u4e0d\u540c\u8fdb\u884c\u533a\u5206\u3002<\/li>\n\n\n\n
                      2. \u6a21\u677f<\/strong>\uff1a\u901a\u8fc7\u6cdb\u578b\u7f16\u7a0b\u5b9e\u73b0\u7684\u591a\u6001\u3002<\/li>\n<\/ol>\n\n\n\n

                        \u52a8\u6001\u591a\u6001\uff08\u8fd0\u884c\u65f6\u591a\u6001\uff09<\/strong><\/h3>\n\n\n\n

                        \u52a8\u6001\u591a\u6001\u4f9d\u8d56\u4e8e \u865a\u51fd\u6570<\/strong>\uff0c\u5b9e\u73b0\u7684\u5173\u952e\u70b9\u5728\u4e8e\uff1a\u57fa\u7c7b\u6307\u9488\u6216\u5f15\u7528\u6307\u5411\u6d3e\u751f\u7c7b\u5bf9\u8c61\uff0c\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u8c03\u7528\u865a\u51fd\u6570\u65f6\uff0c\u5b9e\u9645\u8c03\u7528\u7684\u662f\u6d3e\u751f\u7c7b\u7684\u5b9e\u73b0\uff0c\u800c\u975e\u57fa\u7c7b\u7684\u5b9e\u73b0\u3002<\/p>\n\n\n\n

                        \u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/h4>\n\n\n\n
                        class Animal {
                        public:
                            virtual void speak() { cout << \"\u52a8\u7269\u5728\u53eb\" << endl; }
                        };

                        class Dog :public Animal {
                        public:
                            void speak() override { cout << \"\u6c6a\u6c6a\u6c6a\" << endl; }
                        };

                        int main() {
                            Animal* ptr = new Dog();
                            ptr->speak();  \/\/ \u8f93\u51fa\uff1a\u6c6a\u6c6a\u6c6a<\/em>
                            return0;
                        }<\/code><\/pre>\n\n\n\n
                        \u865a\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406<\/strong><\/h3>\n\n\n\n
                          \n
                        • \u6bcf\u4e2a\u542b\u6709\u865a\u51fd\u6570\u7684\u7c7b\u6709\u4e00\u4e2a\u865a\u51fd\u6570\u8868\uff08vtable\uff09<\/strong>\uff0c\u5176\u4e2d\u5b58\u50a8\u865a\u51fd\u6570\u7684\u5730\u5740\u3002<\/li>\n\n\n\n
                        • \u5bf9\u8c61\u901a\u8fc7\u00a0\u865a\u51fd\u6570\u6307\u9488\uff08vptr\uff09<\/strong>\u00a0\u8bbf\u95ee\u865a\u51fd\u6570\u8868\uff0c\u5b9e\u73b0\u8fd0\u884c\u65f6\u7684\u52a8\u6001\u7ed1\u5b9a\u3002<\/li>\n<\/ul>\n\n\n\n
                          \n\n\n\n
                          4. \u54c8\u5e0c\u8868\u539f\u7406\u4e0e\u51b2\u7a81\u89e3\u51b3<\/strong><\/h2>\n\n\n\n
                          \u54c8\u5e0c\u8868\u7684\u57fa\u672c\u539f\u7406<\/strong><\/h3>\n\n\n\n
                          \u54c8\u5e0c\u8868\u901a\u8fc7 \u54c8\u5e0c\u51fd\u6570<\/strong> \u5c06\u6570\u636e\u7684\u5173\u952e\u5b57\u6620\u5c04\u5230\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u7ec4\u4e2d\u3002\u54c8\u5e0c\u51fd\u6570\u6839\u636e\u5173\u952e\u5b57\u8ba1\u7b97\u51fa\u54c8\u5e0c\u503c\uff0c\u5e76\u5c06\u6570\u636e\u5b58\u50a8\u5728\u5bf9\u5e94\u7684\u6570\u7ec4\u4f4d\u7f6e\u3002<\/p>\n\n\n\n
                          \u5e38\u7528\u7684\u54c8\u5e0c\u51fd\u6570\uff1a<\/strong><\/h4>\n\n\n\n
                            \n
                          1. \u6570\u5b57\u5206\u6790\u6cd5<\/li>\n\n\n\n
                          2. \u5e73\u65b9\u53d6\u4e2d\u6cd5<\/li>\n\n\n\n
                          3. \u5206\u6bb5\u53e0\u52a0\u6cd5<\/li>\n\n\n\n
                          4. \u9664\u7559\u4f59\u6570\u6cd5<\/li>\n\n\n\n
                          5. \u4f2a\u968f\u673a\u6570\u6cd5<\/li>\n<\/ol>\n\n\n\n
                            \u54c8\u5e0c\u51b2\u7a81\u53ca\u89e3\u51b3\u65b9\u6cd5<\/strong><\/h3>\n\n\n\n
                            \u54c8\u5e0c\u51b2\u7a81<\/strong> \u662f\u6307\u591a\u4e2a\u5143\u7d20\u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570\u8ba1\u7b97\u540e\uff0c\u6620\u5c04\u5230\u540c\u4e00\u4e2a\u4f4d\u7f6e\u3002\u5e38\u7528\u7684\u51b2\u7a81\u89e3\u51b3\u65b9\u6cd5\u6709\uff1a<\/p>\n\n\n\n
                              \n
                            1. \u5f00\u653e\u5730\u5740\u6cd5\uff08\u518d\u6563\u5217\u6cd5\uff09<\/strong>\uff1a\u5982\u679c\u5f53\u524d\u4f4d\u7f6e\u88ab\u5360\u7528\uff0c\u901a\u8fc7\u7ebf\u6027\u63a2\u6d4b\u3001\u4e8c\u6b21\u63a2\u6d4b\u7b49\u65b9\u6cd5\u5bfb\u627e\u7a7a\u4f4d\u3002<\/li>\n\n\n\n
                            2. \u94fe\u5f0f\u5730\u5740\u6cd5<\/strong>\uff1a\u4f7f\u7528\u94fe\u8868\u5b58\u50a8\u54c8\u5e0c\u8868\u4e2d\u7684\u5143\u7d20\uff0c\u51b2\u7a81\u7684\u5143\u7d20\u4ee5\u94fe\u8868\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u540c\u4e00\u4e2a\u6570\u7ec4\u69fd\u4e2d\u3002<\/li>\n\n\n\n
                            3. \u5efa\u7acb\u516c\u5171\u6ea2\u51fa\u533a<\/strong>\uff1a\u4f7f\u7528\u4e00\u4e2a\u516c\u5171\u533a\u57df\u6765\u5b58\u50a8\u51b2\u7a81\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
                            4. \u518d\u54c8\u5e0c\u8868<\/strong>\uff1a\u5f53\u54c8\u5e0c\u8868\u8fbe\u5230\u4e00\u5b9a\u7684\u8d1f\u8f7d\u56e0\u5b50\u65f6\uff0c\u91cd\u65b0\u5206\u914d\u5185\u5b58\u5e76\u5c06\u6570\u636e\u91cd\u65b0\u54c8\u5e0c\u3002<\/li>\n<\/ol>\n\n\n\n
                              \n\n\n\n
                              5. sizeof<\/code> \u4e0e strlen<\/code> \u7684\u533a\u522b<\/strong><\/h2>\n\n\n\n
                              sizeof<\/code> \u8be6\u89e3<\/strong><\/h3>\n\n\n\n
                              sizeof<\/code> \u662f\u7f16\u8bd1\u65f6\u8fd0\u7b97\u7b26\uff0c\u7528\u4e8e\u8ba1\u7b97\u6570\u636e\u7c7b\u578b\u6216\u53d8\u91cf\u7684\u5185\u5b58\u5927\u5c0f\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u4efb\u4f55\u6570\u636e\u7c7b\u578b\uff0c\u4e0d\u4ec5\u9650\u4e8e\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
                              \u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
                              char str1[100] = \"hello\";
                              cout << sizeof(str1);  \/\/ \u8f93\u51fa 100<\/em><\/code><\/pre>\n\n\n\n
                              strlen<\/code> \u8be6\u89e3<\/strong><\/h3>\n\n\n\n
                              strlen<\/code> \u662f\u4e00\u4e2a\u8fd0\u884c\u65f6\u51fd\u6570\uff0c\u7528\u4e8e\u8ba1\u7b97 C \u98ce\u683c\u5b57\u7b26\u4e32\u7684\u5b9e\u9645\u957f\u5ea6\uff08\u4e0d\u5305\u62ec\u7ec8\u6b62\u7b26 \\0<\/code>\uff09\u3002<\/p>\n\n\n\n
                              \u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
                              char str[] = \"hello\";
                              cout << strlen(str);  \/\/ \u8f93\u51fa 5<\/em><\/code><\/pre>\n\n\n\n
                              \n\n\n\n
                              6. C++ \u5b57\u7b26\u4e32\uff1astd::string<\/code> \u4e0e C \u98ce\u683c\u5b57\u7b26\u4e32<\/strong><\/h2>\n\n\n\n
                              C \u98ce\u683c\u5b57\u7b26\u4e32\u4e0e std::string<\/code> \u7684\u533a\u522b<\/strong><\/h3>\n\n\n\n
                                \n
                              1. C \u98ce\u683c\u5b57\u7b26\u4e32<\/strong>\uff1aC \u98ce\u683c\u5b57\u7b26\u4e32\u662f\u4ee5\u5b57\u7b26\u6570\u7ec4\u5f62\u5f0f\u5b58\u50a8\u7684\u5b57\u7b26\u4e32\uff0c\u901a\u5e38\u4ee5\u00a0\\0<\/code>\uff08\u7a7a\u5b57\u7b26\uff09\u7ed3\u675f\u3002\u4f7f\u7528\u00a0strlen<\/code>\u00a0\u53ef\u4ee5\u8ba1\u7b97\u5176\u957f\u5ea6\uff0c\u4f46\u9700\u8981\u624b\u52a8\u7ba1\u7406\u5185\u5b58\uff0c\u5bb9\u6613\u5f15\u53d1\u5185\u5b58\u6cc4\u6f0f\u6216\u8d8a\u754c\u9519\u8bef\u3002\u793a\u4f8b\uff1a<\/strong>char\u00a0str[50] =\u00a0\"Hello, world!\";
                                cout\u00a0<<\u00a0strlen(str); \u00a0\/\/ \u8f93\u51fa 13<\/em><\/code><\/li>\n\n\n\n
                              2. std::string<\/code>\uff1astd::string<\/code>\u00a0\u662f C++ \u63d0\u4f9b\u7684\u6807\u51c6\u5e93\u7c7b\uff0c\u81ea\u52a8\u7ba1\u7406\u5185\u5b58\uff0c\u5e76\u63d0\u4f9b\u8bb8\u591a\u4fbf\u6377\u7684\u6210\u5458\u51fd\u6570\uff0c\u5982\u00a0.length()<\/code>\u3001.size()<\/code>\u00a0\u7b49\uff0c\u80fd\u6709\u6548\u907f\u514d\u5185\u5b58\u7ba1\u7406\u9519\u8bef\u3002\u793a\u4f8b\uff1a<\/strong>#include\u00a0<iostream>
                                #include\u00a0<string>

                                using\u00a0namespace\u00a0std;

                                int\u00a0main()\u00a0{
                                \u00a0 \u00a0\u00a0string\u00a0str =\u00a0\"Hello, world!\";
                                \u00a0 \u00a0\u00a0cout\u00a0<< str.length(); \u00a0\/\/ \u8f93\u51fa 13<\/em>
                                \u00a0 \u00a0\u00a0return\u00a00;
                                }<\/code><\/li>\n<\/ol>\n\n\n\n
                                \u4f7f\u7528 std::string<\/code> \u7684\u4f18\u52bf<\/strong><\/h3>\n\n\n\n
                                  \n
                                1. \u81ea\u52a8\u5185\u5b58\u7ba1\u7406<\/strong>\uff1astd::string<\/code>\u00a0\u4f1a\u81ea\u52a8\u8c03\u6574\u5927\u5c0f\uff0c\u5904\u7406\u5185\u5b58\u5206\u914d\u548c\u91ca\u653e\uff0c\u907f\u514d\u4e86 C \u98ce\u683c\u5b57\u7b26\u4e32\u4e2d\u9700\u8981\u624b\u52a8\u7ba1\u7406\u5185\u5b58\u7684\u9ebb\u70e6\u3002<\/li>\n\n\n\n
                                2. \u5b89\u5168\u6027<\/strong>\uff1astd::string<\/code>\u00a0\u63d0\u4f9b\u4e86\u8d8a\u754c\u68c0\u67e5\uff0c\u51cf\u5c11\u4e86\u8bbf\u95ee\u65e0\u6548\u5185\u5b58\u7684\u98ce\u9669\u3002<\/li>\n\n\n\n
                                3. \u4e30\u5bcc\u7684\u529f\u80fd<\/strong>\uff1astd::string<\/code>\u00a0\u63d0\u4f9b\u4e86\u8bb8\u591a\u65b9\u4fbf\u7684\u6210\u5458\u51fd\u6570\uff0c\u4f8b\u5982\u00a0.substr()<\/code>\u3001.find()<\/code>\u3001.append()<\/code>\u00a0\u7b49\uff0c\u6781\u5927\u7b80\u5316\u4e86\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n\n\n\n
                                  \u4f8b\u5b50\uff1a\u4f7f\u7528 std::string<\/code> \u8fdb\u884c\u5b57\u7b26\u4e32\u64cd\u4f5c<\/strong><\/h3>\n\n\n\n
                                  #include <iostream>
                                  #include <string>

                                  usingnamespacestd;

                                  int main() {
                                      string str = \"Hello, world!\";
                                      
                                      \/\/ \u622a\u53d6\u5b57\u7b26\u4e32<\/em>
                                      string subStr = str.substr(7, 5);  \/\/ \u4ece\u7d22\u5f157\u5f00\u59cb\uff0c\u957f\u5ea6\u4e3a5<\/em>
                                      cout << subStr << endl;  \/\/ \u8f93\u51fa \"world\"<\/em>
                                      
                                      \/\/ \u67e5\u627e\u5b50\u4e32<\/em>
                                      size_t pos = str.find(\"world\");
                                      if (pos != string::npos) {
                                          cout << \"Found 'world' at position: \" << pos << endl;
                                      }
                                      
                                      \/\/ \u62fc\u63a5\u5b57\u7b26\u4e32<\/em>
                                      str.append(\" Welcome!\");
                                      cout << str << endl;  \/\/ \u8f93\u51fa \"Hello, world! Welcome!\"<\/em>
                                      
                                      return0;
                                  }<\/code><\/pre>\n\n\n\n
                                  \n\n\n\n
                                  \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
                                  \u672c\u6587\u63a2\u8ba8\u4e86 C++ \u4e2d\u5185\u5b58\u6cc4\u6f0f\u7684\u5e38\u89c1\u539f\u56e0\u4ee5\u53ca\u5982\u4f55\u907f\u514d\uff0c\u5305\u62ec\u57fa\u7c7b\u6790\u6784\u51fd\u6570\u6ca1\u6709\u58f0\u660e\u4e3a\u865a\u51fd\u6570\u3001\u7f3a\u5c11\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u7b49\u5e38\u89c1\u95ee\u9898\uff0c\u5e76\u901a\u8fc7\u5b9e\u4f8b\u8bf4\u660e\u4e86\u5982\u4f55\u907f\u514d\u8fd9\u4e9b\u95ee\u9898\u3002<\/p>\n\n\n\n
                                  \u6b64\u5916\uff0c\u6211\u4eec\u4e5f\u8ba8\u8bba\u4e86 new\/delete<\/code> \u4e0e malloc\/free<\/code> \u7684\u533a\u522b\uff0c\u89e3\u91ca\u4e86\u5982\u4f55\u901a\u8fc7\u865a\u51fd\u6570\u5b9e\u73b0\u8fd0\u884c\u65f6\u591a\u6001\uff0c\u5e76\u4ecb\u7ecd\u4e86\u54c8\u5e0c\u8868\u7684\u57fa\u672c\u539f\u7406\u548c\u51b2\u7a81\u89e3\u51b3\u65b9\u6cd5\u3002\u6700\u540e\uff0c\u6211\u4eec\u5206\u6790\u4e86 sizeof<\/code> \u548c strlen<\/code> \u7684\u533a\u522b\uff0cC++ \u5b57\u7b26\u4e32<\/code> \u4e0eC \u98ce\u683c\u5b57\u7b26\u4e32<\/code> \u7684\u533a\u522b\uff0c\u4ee5\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u8fd9\u4e9b\u5e38\u7528\u7684 C++ \u64cd\u4f5c\u3002<\/p>\n","raw":"","protected":false},"excerpt":{"rendered":"
                                  1. \u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f\u53ca\u5176\u7c7b\u578b \u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f\uff1f \u5185\u5b58\u6cc4\u6f0f\u662f\u6307\u7a0b\u5e8f\u5728\u52a8\u6001\u5206\u914d\u5185\u5b58\u540e\uff0c\u7531\u4e8e\u758f\u5ffd\u6216\u9519\u8bef\u9020\u6210\u4e86\u7a0b\u5e8f\u672a\u80fd\u91ca\u653e\u6389\u4e0d\u518d …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[50],"tags":[],"class_list":["post-6719","post","type-post","status-publish","format-standard","hentry","category-c"],"post_thumbnail_image":"","content_first_image":null,"post_medium_image_300":"","post_thumbnail_image_624":"","post_frist_image":null,"post_medium_image":"","post_large_image":"","post_full_image":"","post_all_images":[],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"C++","post_date":"2025-09-29","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":189,"next_post_id":null,"next_post_title":null,"previous_post_id":6717,"previous_post_title":"AI\u90e8\u7f72\u901a\u7528C++\u77e5\u8bc6\u70b9--\u9762\u8bd5\u5fc5\u77e5\u5fc5\u4f1a(part1)","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/6719","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=6719"}],"version-history":[{"count":1,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/6719\/revisions"}],"predecessor-version":[{"id":6720,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/6719\/revisions\/6720"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=6719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=6719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=6719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}