Java Program to Add Two Complex Numbers.

public class ComplexNumber{
   //for real and imaginary parts of complex numbers
   double real, img;
 
   //constructor to initialize the complex number
   ComplexNumber(double r, double i){
 this.real = r;
 this.img = i;
   }
 
   public static ComplexNumber sum(ComplexNumber c1, ComplexNumber c2)
   {
 //creating a temporary complex number to hold the sum of two numbers
        ComplexNumber temp = new ComplexNumber(0, 0);

        temp.real = c1.real + c2.real;
        temp.img = c1.img + c2.img;
        
        //returning the output complex number
        return temp;
    }
    public static void main(String args[]) {
 ComplexNumber c1 = new ComplexNumber(5.5, 4);
 ComplexNumber c2 = new ComplexNumber(1.2, 3.5);
        ComplexNumber temp = sum(c1, c2);
        System.out.printf("Sum is: "+ temp.real+" + "+ temp.img +"i");
    }
}