#include
using namespace std;
void f(int x = 0, int y = 100);
int main()
{
f(1, 2);
f(10);
f();
return 0;
}
void f(int x, int y)
{
cout << "x: " << x << ", y: " << y << "\n";
}
x: 1, y: 2
x: 10, y: 100
x: 0, y: 100