String character reverse

#include<stdio.h>
int main()
{
char a;
int n,r=0,y=0;
scanf("%c",&a);
n=a;
printf("%d\n",n);
while(n>0)
{
y=n%10;
r=(r*10)+y;
n=n/10;
//printf("%d\n",r);
}
printf("%d\n",r);
printf("%c",r);
}