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Multiple Constructor In C++

When we create different-different type of class inside  in a constructor to declare  so that method is known as multiple constructor in a class.

Fig:Multiple Constructor In C++ 

Syntax:

class classname

{

public:

class name()

{

 

}

classname(argument)

{

}

classname(classname &objectname)

{

}

};

Program:

#include<iostream.h>

#include<conio.h>

class BCA

{

private:

int a,b,c;

public:

BCA()

{

cout<<”multiple constructor”;

a=12;

b=23;

c=a+b;

}

BCA(int x,int y,int z)

{

 a=x;

b=y;

c=z;

}

BCA(BCA &p)

{

a=p.a;

b=p.b;

c=a*b;

}

void display()

{

cout<<a;

cout<<b;

cout<<c;

}

};

void main()

{

BCA a1;

BCA a2(10,20,30);

BCA a3(a2);

a1.display();

a2.display();

a3.display();

getch();

}

 

Output:

Multiple constructor

12 23 35

10 20 30

10 20 200