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Constructors in C++ Programming
In this tutorial, we will be discussing a program to understand constructors in C++.
Constructors are member functions of the classes which initiates the object instance creation. They have the same name as the parent class and don’t have any return type.
Default constructors
Example
#include <iostream>
using namespace std;
class construct {
public:
int a, b;
//default constructor
construct(){
a = 10;
b = 20;
}
};
int main(){
construct c;
cout << "a: " << c.a << endl
<< "b: " << c.b;
return 1;
}Output
a: 10 b: 20
Parameterized constructors
Example
#include <iostream>
using namespace std;
class Point {
private:
int x, y;
public:
Point(int x1, int y1){
x = x1;
y = y1;
}
int getX(){
return x;
}
int getY(){
return y;
}
};
int main(){
Point p1(10, 15);
cout << "p1.x = " << p1.getX() << ", p1.y = " <<
p1.getY();
return 0;
}Output
p1.x = 10, p1.y = 15
Updated on: 12-Mar-2020
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