Question

Create a ComplexNo class for two imaginary numbers. Provide (in addition to add, subtract, multiply, and divide methods) a method for equals (which returns boolean), and toString( ) method (that returns a string representing the receiving object). Throw an exception if an attempt is made to divide by 0 (0 + 0i). Your implementation should return the results of each operation WITHOUT changing the operands.

Exxample:

Enter the first complex number's real part => 1.0

Enter the first complex number's imaginary part => -1.0

Enter the second complex number's real part => -1.0

Enter the second complex number's imaginary part => 1.0

complex number 1: 1.000000 - 1.000000i

complex number 2: -1.000000 + 1.000000i

the numbers are equal? false

add result: 0.000000

subtract result: 2.000000 - 2.000000i

multiply result: 2.000000i

divide result: -1.000000

Here is some of the code:

import java.util.Scanner;
import java.math.*;

public class ComplexNo
{
public static void main(String[] args)
{
double real1, real2, img1, img2;
Scanner scan = new Scanner(System.in);
  
System.out.print("Enter the first complex number's real part =>");
real1 = scan.nextDouble();
  
System.out.print("Enter the first complex number's imaginary part =>");
img1 = scan.nextDouble();
  
System.out.print("Enter the seconds complex number's real part =>");
real2 = scan.nextDouble();
  
System.out.print("Enter the seconds complex number's imaginary part =>");
img2 = scan.nextDouble();
  
  
System.out.printf("%s %.6f %.6f%s", "complex number 1: ", real1, img1 ,"i\n");
System.out.printf("%s %.6f %.6f%s", "complex number 2: ", real2, img2 ,"i\n");
  
addition(real1, real2, img1, img2);
subtraction(real1, real2, img1, img2);   
}

  
public static double addition(double realOne, double realTwo, double imgOne, double imgTwo)
{
double real1 = realOne;
double real2 = realTwo;
double img1 = imgOne;
double img2 = imgTwo;

double sumReal = 0;
double sumImg =0;

sumReal = (real1 + real2);
sumImg = (img1 + img2);

return System.out.format("%s %.6f %.6f%s","add result: ", sumReal, sumImg, "i\n");

}
  
public static double subtraction(double realOne, double realTwo, double imgOne, double imgTwo)
{
double real1 = realOne;
double real2 = realTwo;
double img1 = imgOne;
double img2 = imgTwo;

double sumReal = 0;
double sumImg =0;

sumReal = (real1 - real2);
sumImg = (img1 - img2);

return System.out.format("%s %.6f %.6f%s","subtract result: ", sumReal, sumImg, "i\n");

}
  
}

Answer 1

import java.util.Scanner;
import java.math.*;

public class ComplexNo
{
public static void main(String[] args)
{
double real1, real2, img1, img2;
Scanner scan = new Scanner(System.in);
  
System.out.print("Enter the first complex number's real part =>");
real1 = scan.nextDouble();
  
System.out.print("Enter the first complex number's imaginary part =>");
img1 = scan.nextDouble();
  
System.out.print("Enter the seconds complex number's real part =>");
real2 = scan.nextDouble();
  
System.out.print("Enter the seconds complex number's imaginary part =>");
img2 = scan.nextDouble();
  
  
System.out.printf("%s %.6f %.6f%s", "complex number 1: ", real1, img1 ,"i\n");
System.out.printf("%s %.6f %.6f%s", "complex number 2: ", real2, img2 ,"i\n");
  
addition(real1, real2, img1, img2);
subtraction(real1, real2, img1, img2);

multiply(real1,real2,img1,img2);

divide(real1,real2,img1,img2);
}

  
public static double addition(double realOne, double realTwo, double imgOne, double imgTwo)
{
double real1 = realOne;
double real2 = realTwo;
double img1 = imgOne;
double img2 = imgTwo;

double sumReal = 0;
double sumImg =0;

sumReal = (real1 + real2);
sumImg = (img1 + img2);

return System.out.format("%s %.6f %.6f%s","add result: ", sumReal, sumImg, "i\n");

}
  
public static double subtraction(double realOne, double realTwo, double imgOne, double imgTwo)
{
double real1 = realOne;
double real2 = realTwo;
double img1 = imgOne;
double img2 = imgTwo;

double sumReal = 0;
double sumImg =0;

sumReal = (real1 - real2);
sumImg = (img1 - img2);

return System.out.format("%s %.6f %.6f%s","subtract result: ", sumReal, sumImg, "i\n");

}
  public static double multiply(double realOne, double realTwo, double imgOne, double imgTwo)
{
double real1 = realOne;
double real2 = realTwo;
double img1 = imgOne;
double img2 = imgTwo;

double sumReal = 0;
double sumImg =0;

sumReal = (real1 * real2);
sumImg = (img1 * img2);

return System.out.format("%s %.6f %.6f%s","multiply result: ", sumReal, sumImg, "i\n");

}

public static double divide(double realOne, double realTwo, double imgOne, double imgTwo)
{
double real1 = realOne;
double real2 = realTwo;
double img1 = imgOne;
double img2 = imgTwo;

double sumReal = 0;
double sumImg =0;

sumReal = (real1 / real2);
sumImg = (img1 / img2);

return System.out.format("%s %.6f %.6f%s","divide result: ", sumReal, sumImg, "i\n");

}
}