C++ | Constructors | Question 7

What is the output of following program?

#include <iostream> 
using namespace std; 
  
class Point 
{ 
    int x, y; 
public: 
   Point(const Point &p) { x = p.x; y = p.y; } 
   int getX() { return x; } 
   int getY() { return y; } 
}; 
  
int main() 
{ 
    Point p1; 
    Point p2 = p1; 
    cout << "x = " << p2.getX() << " y = " << p2.getY(); 
    return 0; 
} 

(A) x = garbage value y = garbage value
(B) x = 0 y = 0
(C) Compiler Error

Answer: (C)

Explanation: There is compiler error in line “Point p1;”. The class Point doesn’t have a constructor without any parameter. If we write any constructor, then compiler doesn’t create the default constructor.

It is not true other way, i.e., if we write a default or parameterized constructor, then compiler creates a copy constructor. See the next question.

Quiz of this Question

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