Simple Example Program For Parameterized Constructor In C++

Definition

In C++, Constructor is automatically called when the object(an instance of the class) create.It is the special member function of the class.The constructor has arguments is called as a Parameterized Constructor. 

• It has the same name of the class.
• It must be a public member.
• No Return Values.
• Default constructors are called when constructors are not defined for the classes.

If a Constructor has parameters, it is called a Parameterized Constructor. Parameterized Constructors helps in initializing values when an object is created.  

for better understanding about Constructor,

• Constructors and Destructors in C++ Classes
• C++ Classes

Parameterized Constructor Syntax

class class_name {

    Access Specifier :
    Member - Variables
    Member - Functions
public:
    class_name(variables) {
        // Constructor code 
    }

    //... other Variables & Functions
}

Parameterized Constructor Example Program

/*  Example Program For Simple Example Program Of Parameterized Constructor In C++
    little drops @ thiyagaraaj.com

    Coded By:THIYAGARAAJ MP             */

#include<iostream>
#include<conio.h>

using namespace std;

class Example {
    // Variable Declaration
    int a, b;
public:

    //Constructor

    Example(int x, int y) {
        // Assign Values In Constructor
        a = x;
        b = y;
        cout << "Im Constructor\n";
    }

    void Display() {
        cout << "Values :" << a << "\t" << b;
    }
};

int main() {
    Example Object(10, 20);
    // Constructor invoked.
    Object.Display();

    // Wait For Output Screen
    getch();
    return 0;
}

Sample Output

Im Constructor
Values :10      20