# C# program to find the addition of two complex numbers

Here, we are going to learn how to find the addition of two complex numbers in C#?
Submitted by Nidhi, on September 21, 2020

Here we will demonstrate the addition of two complex numbers. The complex number contains two parts real and imaginary.

Program:

The source code to demonstrate the addition of two complex numbers is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

```//C# Program to add complex numbers

using System;
class Complex
{
public int real;
public int img;

public Complex()
{
this.real = 0;
this.img  = 0;
}
public Complex(int real, int img)
{
this.real = real;
this.img  = img;
}

public static Complex operator +(Complex Ob1, Complex Ob2)
{
Complex temp = new Complex();
temp.real = Ob1.real + Ob2.real ;
temp.img  = Ob1.img  + Ob2.img  ;

return temp;
}

public void PrintComplexNumber()
{
Console.WriteLine("{0} + {1}i", real, img);
}
}

class Program
{
static void Main()
{
Complex C1 = new Complex(5, 6);
Complex C2 = new Complex(7, 3);
Complex C3;

C3 = C1 + C2;

Console.Write("C1 : ");
C1.PrintComplexNumber();

Console.Write("C2 : ");
C2.PrintComplexNumber();

Console.Write("C3 : ");
C3.PrintComplexNumber();
}
}
```

Output:

```C1 : 5 + 6i
C2 : 7 + 3i
C3 : 12 + 9i
Press any key to continue . . .
```

Explanation:

Here, we created a class Complex that contains data members real and img. Here we defined two constructors two initialize the values of data members.

```public static Complex operator +(Complex Ob1, Complex Ob2)
{
Complex temp = new Complex();
temp.real = Ob1.real + Ob2.real ;
temp.img  = Ob1.img  + Ob2.img  ;

return temp;
}
```

Here we overload the binary '+' operator to add two complex numbers, and we also defined a method PrintComplexNumber() to print a complex number on the console screen.

In the Main() method, we created two objects of complex class C1, C2 initialized using parameterized constructor and we created a reference C3.

C3 = C1 + C2;

Here, we assign the sum of C1 and C2 into C3 and then we printed values of all objects.

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