Modulus operator using * and /

//  Program to implement modulus operator using * and /
#include <stdio.h>

int my_mod( int a, int b){
    return ( a - (b*(a/b)));
}

int main(){
    int a = 11;
    int b = 2;
    printf("Remainder = %d\n", my_mod(a,b));
    getch();
    return 0;
}