输入字符串反序输出

#include<stdio.h>#include<string.h>int main(){char str[100],ch;int i,j,k;printf("please input a string:\n");scanf("%s",&str);k = strlen(str);for(i=0,j=k-1;i<k/2;i++,j--){ch = str[i];str[i] = str[j];str[j] = ch;}printf("%s\n",str);return 0;}

please input a string:HelloWorlddlroWolleHPress any key to continue