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Program to Add Two Complex Numbers
• Difficulty Level : Easy
• Last Updated : 21 May, 2021

Given two complex numbers of the form

Here the values of real and imaginary numbers are passed while calling the parameterized constructor and, with the help of a default(empty) constructor, the function addComp is called to get the addition of complex numbers.

Example:

```Input: a1 = 4, b1 = 8
a2 = 5, b2 = 7
Output: Sum = 9 + i15
Explanation:
(4 + i8) + (5 + i7)
= (4 + 5) + i(8 + 7)
= 9 + i15

Input: a1 = 9, b1 = 3
a2 = 6, b2 = 1
Output: Sum = 15 + i4 ```

The following program is an illustration of the above example.

## C++

 `// C++ program to Add two complex numbers``#include``using` `namespace` `std;`` ` `// User Defined Complex class``class` `Complex {`` ` `    ``// Declaring variables``    ``public``:``        ``int` `real, imaginary;`` ` `    ``// Empty Constructor``    ``Complex()``    ``{``    ``}`` ` `    ``// Constructor to accept``    ``// real and imaginary part``    ``Complex(``int` `tempReal, ``int` `tempImaginary)``    ``{``        ``real = tempReal;``        ``imaginary = tempImaginary;``    ``}`` ` `    ``// Defining addComp() method``    ``// for adding two complex number``    ``Complex addComp(Complex C1, Complex C2)``    ``{``        ``// creating temporary variable``        ``Complex temp;`` ` `        ``// adding real part of complex numbers``        ``temp.real = C1.real + C2.real;`` ` `        ``// adding Imaginary part of complex numbers``        ``temp.imaginary = C1.imaginary + C2.imaginary;`` ` `        ``// returning the sum``        ``return` `temp;``    ``}``};`` ` `// Main Class``int` `main()``{` `    ``// First Complex number``    ``Complex C1(3, 2);` `    ``// printing first complex number``    ``cout<<``"Complex number 1 : "``<< C1.real``                ``<< ``" + i"``<< C1.imaginary<

## Java

 `// Java program to Add two complex numbers` `import` `java.util.*;` `// User Defined Complex class``class` `Complex {` `    ``// Declaring variables``    ``int` `real, imaginary;` `    ``// Empty Constructor``    ``Complex()``    ``{``    ``}` `    ``// Constructor to accept``    ``// real and imaginary part``    ``Complex(``int` `tempReal, ``int` `tempImaginary)``    ``{``        ``real = tempReal;``        ``imaginary = tempImaginary;``    ``}` `    ``// Defining addComp() method``    ``// for adding two complex number``    ``Complex addComp(Complex C1, Complex C2)``    ``{``        ``// creating temporary variable``        ``Complex temp = ``new` `Complex();` `        ``// adding real part of complex numbers``        ``temp.real = C1.real + C2.real;` `        ``// adding Imaginary part of complex numbers``        ``temp.imaginary = C1.imaginary + C2.imaginary;` `        ``// returning the sum``        ``return` `temp;``    ``}``}` `// Main Class``public` `class` `GFG {` `    ``// Main function``    ``public` `static` `void` `main(String[] args)``    ``{` `        ``// First Complex number``        ``Complex C1 = ``new` `Complex(``3``, ``2``);` `        ``// printing first complex number``        ``System.out.println(``"Complex number 1 : "``                           ``+ C1.real + ``" + i"``                           ``+ C1.imaginary);` `        ``// Second Complex number``        ``Complex C2 = ``new` `Complex(``9``, ``5``);` `        ``// printing second complex number``        ``System.out.println(``"Complex number 2 : "``                           ``+ C2.real + ``" + i"``                           ``+ C2.imaginary);` `        ``// for Storing the sum``        ``Complex C3 = ``new` `Complex();` `        ``// calling addComp() method``        ``C3 = C3.addComp(C1, C2);` `        ``// printing the sum``        ``System.out.println(``"Sum of complex number : "``                           ``+ C3.real + ``" + i"``                           ``+ C3.imaginary);``    ``}``}`

## Python3

 `# Python3 program to Add two complex numbers`` ` `# User Defined Complex class``class` `Complex``:` `    ``# Constructor to accept``    ``# real and imaginary part``    ``def` `__init__(``self``, tempReal, tempImaginary):  ``        ``self``.real ``=` `tempReal;``        ``self``.imaginary ``=` `tempImaginary;` `    ``# Defining addComp() method``    ``# for adding two complex number``    ``def` `addComp(``self``, C1, C2):` `        ``# creating temporary variable``        ``temp``=``Complex``(``0``, ``0``)`` ` `        ``# adding real part of complex numbers``        ``temp.real ``=` `C1.real ``+` `C2.real;`` ` `        ``# adding Imaginary part of complex numbers``        ``temp.imaginary ``=` `C1.imaginary ``+` `C2.imaginary;`` ` `        ``# returning the sum``        ``return` `temp;``    ` `# Driver code``if` `__name__``=``=``'__main__'``:` `    ``# First Complex number``    ``C1 ``=` `Complex``(``3``, ``2``);` `    ``# printing first complex number``    ``print``(``"Complex number 1 :"``, C1.real, ``"+ i"` `+` `str``(C1.imaginary))` `    ``# Second Complex number``    ``C2 ``=` `Complex``(``9``, ``5``);` `    ``# printing second complex number``    ``print``(``"Complex number 2 :"``, C2.real, ``"+ i"` `+` `str``(C2.imaginary))``    `  `    ``# for Storing the sum``    ``C3 ``=` `Complex``(``0``, ``0``)` `    ``# calling addComp() method``    ``C3 ``=` `C3.addComp(C1, C2);` `    ``# printing the sum``    ``print``(``"Sum of complex number :"``, C3.real, ``"+ i"``+` `str``(C3.imaginary))` `# This code is contributed by rutvik_56.`

## C#

 `// C# program to Add two complex numbers``using` `System;` `// User Defined Complex class``public` `class` `Complex``{` `    ``// Declaring variables``    ``public` `int` `real, imaginary;` `    ``// Empty Constructor``    ``public` `Complex()``    ``{``    ``}` `    ``// Constructor to accept``    ``// real and imaginary part``    ``public` `Complex(``int` `tempReal, ``int` `tempImaginary)``    ``{``        ``real = tempReal;``        ``imaginary = tempImaginary;``    ``}` `    ``// Defining addComp() method``    ``// for adding two complex number``    ``public` `Complex addComp(Complex C1, Complex C2)``    ``{``        ``// creating temporary variable``        ``Complex temp = ``new` `Complex();` `        ``// adding real part of complex numbers``        ``temp.real = C1.real + C2.real;` `        ``// adding Imaginary part of complex numbers``        ``temp.imaginary = C1.imaginary + C2.imaginary;` `        ``// returning the sum``        ``return` `temp;``    ``}``}` `// Main Class``public` `class` `GFG``{` `    ``// Main function``    ``public` `static` `void` `Main(String[] args)``    ``{` `        ``// First Complex number``        ``Complex C1 = ``new` `Complex(3, 2);` `        ``// printing first complex number``        ``Console.WriteLine(``"Complex number 1 : "``                        ``+ C1.real + ``" + i"``                        ``+ C1.imaginary);` `        ``// Second Complex number``        ``Complex C2 = ``new` `Complex(9, 5);` `        ``// printing second complex number``        ``Console.WriteLine(``"Complex number 2 : "``                        ``+ C2.real + ``" + i"``                        ``+ C2.imaginary);` `        ``// for Storing the sum``        ``Complex C3 = ``new` `Complex();` `        ``// calling addComp() method``        ``C3 = C3.addComp(C1, C2);` `        ``// printing the sum``        ``Console.WriteLine(``"Sum of complex number : "``                        ``+ C3.real + ``" + i"``                        ``+ C3.imaginary);``    ``}``}` `// This code is contributed by Princi Singh`

## Javascript

 ``
Output:
```Complex number 1 : 3 + i2
Complex number 2 : 9 + i5
Sum of complex number : 12 + i7```

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