#include <stdio.h>
int x;
int foo(void) {
    printf("Hello from foo\n");
    printf("Setting x\n");
    x = 5;
    return 0;
}
int bar(void) {
    printf("Hello from bar\n");
    printf("X: %d\n", x);
    return 0;
}

void do_things(int a, int b) {
}
int main(void) {
    do_things(foo(), bar());
}