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                其實也是在面試的時候遇到的這個問題 回來了郁悶到了查了下這函數 哎 ? 以前學Java的 沒見到過這些世面 終于還是看到這些基礎的函數了 試著寫了下這個strcat函數,挺簡單的 ~~~ char* _strcat_d(char* dest, char* src) { char* newStr = dest; if (dest == NULL || src == NULL) return NULL; // 如果有空的就扔個空指針出去 while (*dest != '\0') dest++; // 找到'\0'結束的位置,把指針指向最后的那個字符 while (*dest++ = *src++); return newStr; } ~~~ 在main函數試試 ~~~ int main() { char k[256] = "ChengDu"; char p[256] = "Neusoft"; // 把p鏈接在k的后面 _strcat_d(k,p); cout << k <<endl; system("pause"); return 0; } ~~~ 效果圖 ![](https://box.kancloud.cn/2016-08-19_57b6ce7d03d44.jpg)
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