#include <stdio.h>

int set_xyz() {
    int xyz = 1;
    return xyz;
}

int foo() {
    int xyz;
    return xyz;
}

int main() {
    printf("Foo return value: %d\n", foo());
    set_xyz();
    printf("Foo return value: %d\n", foo());
    set_xyz();
    printf("Foo return value: %d\n", foo());
    return 0;
}