字符串链接strcat

 #include "stdafx.h"
  #include "iostream"
  #include "assert.h"
  #include "string"

  using namespace std;

  char* mystrcat(char* dest, const char* src)
  {
     assert(dest!=NULL && src!=NULL);
     char* p = dest;
     while (*p!='\0')
         p++;
     while (*p++ = *src++);
     *p = '\0';
     return dest;
 }

 int main(int argc, char* argv[])
 {
     printf("Hello World!\n");
     char buf[] = "FU ";
     char test[] = "CK!";
     mystrcat(buf, test);
     cout << buf << endl;
     return ;
 }

输出：

Hello World!

FU CK!

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