编辑代码

#include <iostream>
using namespace std;

int Foo();
int Gear();

int g_alice = Foo();
int g_bob = Gear();



int Foo() {
    return g_bob;
}
int Gear() {
    return 3;
}

int main() { 
    cout << g_bob << endl;
    cout << g_alice << endl;
	return 0;
}