字符串反序

#include<stdio.h>#include<string.h>void reverse(char str[]){    int n,i,j;    char t;    j=strlen(str)-1;    for(i=0;i<j;i++,j--)    {        t=str[i];        str[i]=str[j];        str[j]=t;    }}void main(){    char str[100];    gets(str);    reverse(str);    printf("%s\n",str);}