What Is Meant By Constructor In C++

What Is Meant By Constructor In C++

     Class name and function name should be same is called constructor

1. Default constructor

2. Parametrized constructor

3. Multiple constructor

Default constructor

#include<iostream.h>

#include<conio.h>

class arun

{

public:

char name [20];

int age;

arun()

{

cout<<"Enter the name and age is :"<<endl;

cin>>name>>age;

}

void putdata()

{

cout<<"The given name is :"<<name<<endl;

cout<<"The given name is :"<<age<<endl;

}

};

void main()

{

clrscr();

arun a;

a.putdata();

getch();

}

Parametrized constructor

#include<iostream.h>

#include<conio.h>

class arun

{

public:

char name [20];

int age;

int c;

arun(int a,int b)

{

cout<<"Enter the name and age is:"<<endl;

cin>>name>>age;

c=a+b;

}

void putdata()

{

cout<<"The given name is"<<name<<endl;

cout<<"The given age is"<<age<<endl;

cout<<"The given value of c is:"<<c<<endl;

}

};

void main()

{

clrscr();

arun a(100,200);

a.putdata();

getch();

}

Multiple constructor

#include<iostream.h>

#include<conio.h>

class arun

{

public:

char name [20];

int age;

int c;

arun()

{

cout<<"Enter the name and age is:"<<endl;

cin>>name>>age;

}

arun(int a,int b)

{

c=a+b;

}

void putdata()

{

cout<<"The given name is:"<<name<<endl;

cout<<"The given age is:"<<age<<endl;

}

void putdata()

{

cout<<"The value of c is:"<<c<<endl;

}

};

void main()

{

clrscr();

arun a;

arun a1(100,200);

a.putdata();

a1.putdata1();

getch();

}