#include <stdio.h>


int add(int a, int b){
    int output;
    
    output=a+b;
    printf("add has been called %d, %d\n", a,b);
    a=100;
    return output;
}

int main(){
    int x,a,b;

    a=4;
    b=5;
    x=add(a,b);
    printf("add %d and %d is %d", a,b,x);

    return 0;
}