Q. Output of following program?
#include <iostream>
using namespace std;
int fun(int=0, int = 0);
int main()
{
cout << fun(5);
return 0;
}
int fun(int x, int y)
{
return (x+y);
}

• (A) Compiler Error
• (B) 5
• (C) 0
• (D) 10