strcat函数

char *Strcat(char *&StrDes, const char *StrSrc)
{
 assert(StrDes != NULL && StrSrc != NULL);
 char *p = StrDes;
 while (*p != '\0')
 {
  p++;
 }
 while (*StrSrc != '\0')
 {
  *p++ = *StrSrc++;
 }

 return StrDes;
}