C++ | Operator Overloading | Question 7

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Output of following program? C 
#include <iostream>
using namespace std;
class Test2
{
    int y;
};

class Test
{
    int x;
    Test2 t2;
public:
    operator Test2 ()  { return t2; }
    operator int () { return x; }
};

void fun ( int x) { cout << "fun(int) called"; }
void fun ( Test2 t ) { cout << "fun(Test 2) called"; }

int main()
{
    Test t;
    fun(t);
    return 0;
}
fun(int) called
fun(Test 2) called
Compiler Error: Ambiguous call to fun()

This question is part of this quiz :

C++ Operator Overloading
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C++ Quiz
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