实现拷贝函数（strcpy）

 #include <stdio.h>
 #include <stdlib.h>
 
 // 函数声明
 char *mystrcpy(char *object, char *source);
 
 void main()
 {
     char str[];
     char *p = "Hello，15PB";
 
     printf("%s", mystrcpy(str, p));
 
     system("pause");
 }
 
 // 拷贝函数
 char *mystrcpy(char *object, char *source)
 {
     if (object == NULL || source == NULL)
     {
         return NULL;
     }
 
     char *pstr = object;
 
     while (*source != '\0')
     {
         *object = *source;
         object++;
         source++;
     }
     *object = *source;    // 处理'\0'
 
 //     while ((*object++ = *source++))
 //     {
 //
 //     }
     return pstr;
 }