C++ Program to Add/Subtract Complex Numbers using Operator Overloading

In this C++ Program we will Add and Subtract two complex numbers using Operator Overloading.

Recommended: Operator Overloading

Steps to Add/Subtract Complex Numbers using Operator Overloading

  1. Declare a class named Complex with two attributes, one for real coefficient and another for imaginary coefficient of a complex number.
  2. Overload ‘+’ operator by adding the real value of the current instance of Complex (this) with the incoming instance of the Complex (obj). Do the same for the imaginary value of the complex numbers.
  3. Overload ‘-‘ operator by subtracting the real value of the current instance of Complex (this) with the incoming instance of the Complex (obj). Do the same for the imaginary value of the complex numbers.
  4. Return the newly formed Complex object (temp) from the overloaded operator functions.
  5. Create the two objects of class Complex (a, b) and instantiate them with the values.
  6. Add/Subtract them using +/- operator and store the result into another object (c).

Add/Subtract Complex Numbers using Operator Overloading in C++

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#include <iostream>
 
using namespace std;
 
class Complex{
public:
    float real;
    float img;
 
    Complex(){
        real = img =0;
    }
 
    Complex(float r, float i){
        real = r;
        img = i;
    }
 
    Complex operator+(const Complex &obj){
        Complex temp;
        temp.img = this->img + obj.img;
        temp.real = this->real + obj.real;
        return temp;
    }
 
    Complex operator-(const Complex &obj){
        Complex temp;
        temp.img = this->img - obj.img;
        temp.real = this->real - obj.real;
        return temp;
    }
 
    void display(){
        cout << this->real << " + " << this->img << "i" << endl;
    }
 
};
 
int main()
{
    Complex a, b, c;
 
    cout << "Enter real and complex coefficient of First Complex number" << endl;
    cin >> a.real;
    cin >> a.img;
 
    cout << "Enter real and complex coefficient of Second Complex number" << endl;
    cin >> b.real;
    cin >> b.img;
 
    cout << "Adding Complex Numbers" << endl;
    c = a+b;
    c.display();
 
    cout << "Subtracting Complex Numbers" << endl;
    c = a-b;
    c.display();
 
    return 0;
}

Output

add complex numbers using operator overloading

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