运行以下代码，屏幕上将输出？
#include <iostream>
using namespace std;
int
var = 100;
void
function() {
int
var = 200;
cout <<
var << " ";
cout << ::
var << " ";
}
int main() {
cout <<
var << " ";
function();
var += 100;
cout <<
var << " ";
return 0;
}
