Which of the following operators are overloaded by default by the compiler in every user defined classes even if user has not written?
1) Comparison Operator ( == ) 2) Assignment Operator ( = )
(A) Both 1 and 2
(B) Only 1
(C) Only 2
(D) None of the two
Answer: (C)
Explanation: Assign operator is by default available in all user defined classes even if user has not implemented. The default assignement does shallow copy.
But comparison operator “==” is not overloaded.
#include<iostream>
using namespace std;
class Complex {
private:
int real, imag;
public:
Complex(int r = 0, int i =0) {real = r; imag = i;}
};
int main()
{
Complex c1(10, 5), c2(2, 4);
// For example, below code works fine
c1 = c2;
// But this code throws compiler error
if (c1 == c2)
cout << "Same";
return 0;
}