Reverse a number

#include <stdio.h>

int main(){

    int
        input,
        rem,
        rev = 0;

    scanf("%d", &input);

    while (input > 0){

        rem = input % 10;
        rev = (rev * 10) + rem;
        input /= 10 ;
    }
    printf("%d", rev);

    return 0;
}