Parameterised Constructor in C++

We know that whenever we create a class, a default constructor gets created, which is invisible mainly in other languages. But when we make a constructor by ourselves, there is flexibility for us to pass the arguments we might think are necessary for the constructor while creating the object in the primary function. Creating a parametrised constructor is pretty simple. We must make our constructor in the class function pass the necessary parameters.

C++ Code

// Here we are writing down the C++ Programming language code
// demonstrate the concept of Parameterized constructor in C++
#include <iostream>
using namespace std;
// the below code snippet helps us with creating the
// Parameterized constructor class in C++ language
class ParamA {
private:
// we have declared that variables b and c in private mode are
int b, c;
public:
ParamA (int b1, int c1)
{
    // we have declared that variables b and c in private mode are
    // given the values here as b1 and c1 now
b = b1;
c = c1;
}
// this is the getter to get the value for variable b when it is
// called
int getX ()
{
return b;
}
// this is the getter to get the value for variable c when it is
// called
int getY ()
{
return c;
}
};
// the main driver code functionality starts from here
int main ()
{
ParamA p1(10, 15);
cout << "the value we have created for p1.b is: " << p1. getX() << ", the value we have created for p1.b is: p1.c = " << p1.getY();
return 0;
}

Output:

/ tm p/ po Rl 42 Ph db .o
the value we have created for p1.b is: 10, the value we have created for p1.b is: p1.c = 15

C++ Code

// Here we are writing down the C++ Programming language code
// demonstrate the concept of Parameterized constructor in C++
#include <iostream>
using namespace std;
// the below code snippet helps us with creating the
// Parameterized constructor class in C++ language
class ParamCode {
public:
int x;
ParamCode (int i);
~ParamCode ();
};
ParamCode::ParamCode (int i) {
x = i;
}
ParamCode::~ParamCode() {
cout<< "After destructing the objects which are having the value of x is as follows:  " << x <<" \n";
}
// the main driver code functionality starts from here
int main () {
ParamCode t1(20);
ParamCode t2(15);
cout<< "the values for t1.x is:  "<<t1.x <<" " << "the values for t2.x is:  "<<t2.x << "\n";
return 0;
}

Output:

/tmp/poRl42Phdb.o
the values for t1.x is:  20 the values for t2.x is:  15
After destructing the objects which have the value of x is as follows:  15
After destructing the objects which have the value of x is as follows:  20

C++ Code

// Here we are writing down the C++ Programming language code
// demonstrate the concept of Parameterized constructor in C++

#include <iostream>

using namespace std;

// the below class we are creating to calculate the length of the rectangle 

class rectangle {

   private:

       double length;

       double breadth;

   public:

       // to demonstrate our concept, we are creating parameterised constructor to calculate the length of the rectangle
       rectangle(double len, double brt) {

// below code helps us with initialising the members of the private members of the class with certain variables 
                 length = len;

                 breadth = brt;

       }

       double calculateArea() {

                 return length * breadth;

       }

};

// the main driver code functionality starts from here

int main() {

       // below code snippet we have written in C++ programming language helps us with creating the objects
       // which are initialised with certain data members to make the object creation successful

       rectangle rect1(840, 18.6);

       rectangle rect2(628.5, 46);
       
       // the below couple of cout statements help us print the values after the operation is performed successfully!

       cout << "after calculating the area of rectangle 1 we have got as: " << rect1.calculateArea() << endl;

       cout << "after calculating the area of rectangle 2 we have got as: "<< rect2.calculateArea() << endl;

       return 0;

}

Output:

after calculating the area of rectangle 1, we have got as 15624
after estimating the size of rectangle two, we have obtained: 28911

Next TopicRemove Duplicates from Sorted Array in C++

← prev next →

For Videos Join Our Youtube Channel: Join Now

Feedback

Send your Feedback to [email protected]

Help Others, Please Share

Learn Latest Tutorials

Splunk

SPSS

Swagger

Transact-SQL

Tumblr

ReactJS

Regex

Reinforcement Learning

R Programming

RxJS

React Native

Python Design Patterns

Python Pillow

Python Turtle

Keras

Preparation

Aptitude

Reasoning

Verbal Ability

Interview Questions

Company Questions

Trending Technologies

Artificial Intelligence

AWS

Selenium

Cloud Computing

Hadoop

ReactJS

Data Science

Angular 7

Blockchain

Git

Machine Learning

DevOps

B.Tech / MCA

DBMS

Data Structures

DAA

Operating System

Computer Network

Compiler Design

Computer Organization

Discrete Mathematics

Ethical Hacking

Computer Graphics

Software Engineering

Web Technology

Cyber Security

Automata

C Programming

C++

Java

.Net

Python

Programs

Control System

Data Mining

Data Warehouse

^{Like/Subscribe us for latest updates or newsletter}

C++ Tutorial

C++ Control Statement

C++ Functions

C++ Arrays

C++ Pointers

C++ Object Class

C++ Inheritance

C++ Polymorphism

C++ Abstraction

C++ Namespaces

C++ Strings

C++ Exceptions

C++ Templates

Signal Handling

C++ File & Stream

C++ Misc

C++ STL Tutorial

C++ Iterators

C++ Programs

MCQ

Interview Question

Parameterised Constructor in C++

C++ Code

C++ Code

C++ Code

Feedback

Help Others, Please Share

Learn Latest Tutorials

Preparation

Trending Technologies

B.Tech / MCA