Question

Define a class named COMPLEX for complex numbers, which has two private data members of type double (named real and imaginary) and the following public methods: 1- A default constructor which initializes the data members real and imaginary to zeros. 2- A constructor which takes two parameters of type double for initializing the data members real and imaginary. 3- A function "set" which takes two parameters of type double for changing the values of the data members real and imaginary. 4- A function getReal() which returns the value of the real data member. 5- A function getImaginary() which returns the value of the imaginary member. 6- A function "add" which takes a parameter of type COMPLEX and return an object of type COMPLEX. The function performs the addition of two complex numbers. That is, if obj1 and obj2 are of type COMPLEX, then, executing obj1.add(obj2) will return an COMPLEX object which represents the result of adding obj1 to obj2. 7- A function print() which prints the value of a COMPLEX object in the form of x + jy, where x and y are the real and imaginary parts. Write a main function which instantiate two objects of type COMPLEX and asks the user to enter real and imaginary values for each. Then, the program computes the addition of the two complex numbers and print the result of the addition to the screen.

Answer 1

public class Complex {

    double real;
    double imag;

    public Complex(double real, double imag) {
        this.real = real;
        this.imag = imag;
    }

    public static void main(String[] args) {
        Complex n1 = new Complex(2.3, 4.5),
                n2 = new Complex(3.4, 5.0),
                temp;

        temp = add(n1, n2);

        System.out.printf("Sum = %.1f + %.1fi", temp.real, temp.imag);
    }

    public static Complex add(Complex n1, Complex n2)
    {
        Complex temp = new Complex(0.0, 0.0);

        temp.real = n1.real + n2.real;
        temp.imag = n1.imag + n2.imag;

        return(temp);
    }
}

When you run the program, the output will be:

Sum = 5.7 + 9.5i