#include <stdio.h>

void add(int *a, int *b, int *c, int n){
    int i;
    for(i=0; i<n; i++)
        c[i] = a[i] + b[i];
}

int main(int argc, const char * argv[]) {
    int i, n=3;
    int a[] = {1,2,3};
    int b[] = {4,5,6};
    int c[3] = {0};
    
    add(a,b,c,n);
    
    for(i=0; i<n; i++)
        printf("%3d %3d %5d\n", a[i], b[i], c[i]);
    
    return 0;
}