Constructor and Destructor in C++

A constructor is used to allocate the memory for the newly created object. A constructor has the same name with the class.

If a class does not have any constructor, the default constructor is provided.

In the following code we have shown how to create objects of a class.

#include <iostream> using namespace std; class Test { int x, y; }; int main() { Test t1; Test t2(); return 0; }

Parameterized Constructor

#include <iostream> using namespace std; class Test { int x, y; public: Test(int x, int y) { this -> x = x; this -> y = y; } void print() { cout << x << " " << y << endl; } }; int main() { Test t1(5, 7); t1.print(); return 0; }

Constructor Overloading

#include <iostream> using namespace std; class Test { int x, y; public: Test(int x) { this -> x = x; this -> y = 0; } Test(int x, int y) { this -> x = x; this -> y = y; } void print() { cout << x << " " << y << endl; } };

Happy Exploring!