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Constructor Overloading In C++

In C++, We can have more than one constructor in a class with same name, as long as each has a different list of arguments.This concept is known as Constructor Overloading.

Fig: Constructor Overloading In C++ 

Syntax:

Class classname

{

----

-----

}

Class classname(argument)

{

----

------

};

Program:

#include<iostream.h>

#include<conio.h>

class BCA

{

int a,b,c;

public:

BCA()

{

a=b=c=0;

}

BCA(int a)

{

this->a=this->b=this->c=a;

}

BCA(int a, int b)

{

this->a=a;

this->b=b;

this->c=a+b;

}

void display()

{

cout<<”a=”<<a;

cout<<”b=”<<b;

cout<<”c=”<<c;

}

};

void main()

{

BCA a1;

a1.display();

BCA a2(10);

a2.display();

BCA a3(20,30);

a3.display();

getch();

}

Output:

a=0 b=0 c=0 a=10 b=10 c=10 a=20 b=30 c=9915