#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

//字符串copy操作

//字符串copy函数

void copy_str21(char *from,char *to)

{

    for (; *from != '\0'; from++, to++)

    {

        *to = *from;

    }

    *to = '\0';

    return;

}

void copy_str22(char *from,char *to)

{

    while(*to++ = *from++);

}

int main()

{

    char *from ="abcdefg";

    char buf2[];

    /*copy_str21(from,buf2);

    printf("buf2:%s\n",buf2);*/

    copy_str22(from, buf2);

    printf("buf2:%s\n", buf2);

    system("pause");

    return ;

}