What is a function Object native code in C++?

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What is Constructor in C++ for example?

In C++, a function Object() { [native code] } is a specific member function with the same name as its class that is used to initialise a variable value to an object's data members. When a class object is created, it is automatically checked.

CONSTRUCTOR TYPES:

There are three sorts of constructors.

1.Constructor by default

2.Constructor with parameters

3.Make a copy of the function Object() { [native code] }.

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SOURCE CODE BELOEW<> 

Default constructor Example:

#include<iostream>

  using namespace std;

  class math// class name

 {

    private:

int a,b,c;

    public:

  void display()

  //function declaration

  

  {

         c=a+b;

cout<<"TOTAL:"<<c;

  }

  math()

 // class name and constructor is same

      {

a=0;//default value

b=0;//default value

      }

  };

  int main()

 {

  math o;//object create for class

  o.display();//function calling

 }

OUTPUT<>

TOTAL=0

Parameterized constructor Example: 

SOURCE CODE BELOEW<>

#include<iostream>

 using namespace std;

 class math// class name

 {

     private:

int a,b,c;

     public:

  void display()

  //function declaration

  {

    c=a+b;

    cout<<"TOTAL:"<<c;

  }

    math(int x,int y)

   {

a=x;//value Assign

b=y;//value Assign

   }

 };

 int main()

 {

    math o(10,20);

    //value given in parameter

    o.display();//function calling

 }

OUTPUT<>

TOTAL=30 Copy constructor  Example:

 SOURCE CODE BELOEW<>

#include<iostream>

  using namespace std;

  class math// class name

 {

     private:

         int a,b,c;

     public:

  void display()//function declaration

  {

     c=a+b;

     cout<<"\n TOTAL:"<<c;

  }

  math(int x,int y)//parameterized

 {

     a=x;//value Assign

     b=y;//value Assign

 }

  math(math &x)//copy constructor

 {

   a=x.a;

   b=x.b;

 }

  };

  int main()

  {

     math o(10,30);

     //parameterized value

     math o1(o);

     //give the copy constructor

     o.display();

     //calling function

     o1.display();

     //copy constuctor object colling

  }

OUTPUT<>

TOTAL=30

TOTAL=30