#include <stdio.h>

int *f (int varNotToSet, int varToSet) {
    int n = 7;
    varToSet = 7;
    return ------- ;
//    &n, &varNotToSet, or &varToSet could go here.
}

int fib (int n) {
    if (n == 0 || n == 1) {
        return n;
    } else {
        return fib(n-1) + fib(n-2);
    }
}

int main ( ) {
    int *ptr;
    int k1 = 7, k2 = 0, n;
    ptr = f (k1, k2);
    printf ("7 = ");
    printf ("%d\n", *ptr);
    return 0;
}