#include<stdio.h>
#include<string.h>
int main(void)
{
char a[256];
int len,n,i,tem;
printf("请输入：\n");
gets(a);
printf("%s\n",a);
len = strlen(a);
n=len/2;
for(i=0;i<n;i++){
//把第i个字符， 和第len-1-i 个交换
tem = a[i];
a[i] = a[len-i-1];
a[len-i-1] = tem;
}
printf("%s\n",a); //输出逆转后的值
return 0;
}
