#include <stdio.h>
#include <string.h>

int _getch(void);

Void main()
{
    char str[80];
    int len;
    scanf("%s",str);
    len=strlen(str);
    int i,j;
    char temp;
    for (i=0,j=len-1;i<j;i++,j--)
    {
        temp=str[i];
        str[i]=str[j];
        str[j]=temp;
    }
    printf(str);
    _getch();
}

javalove:

that question is from "k&r", if your lecturer gave you the question, he must be lazy or he wants you all to pass.