0

Thanks for taking the time. I'm a beginner and I ran into a roadblock with the following code. The assignment is to create a class Complex to add and subtract complex numbers and a Class to test it. Unfortunately, I can't get it to compile so I can debug it. The error I can't seem to get past is in the ComplexMath( firstComplexNumber, secondComplexNumber ) method call. My instructor quit teaching in the middle of the term, so any help would be greatly appreciated.

```
import javax.swing.JOptionPane;
public class Complex {
public static void main( String args[] ) {
ComplexNumber firstComplexNumber = new ComplexNumber();
ComplexNumber secondComplexNumber = new ComplexNumber();
String sReal = "";
String sImaginary = "";
float fReal = 0;
float fImaginary = 0;
String result = "";
sReal = JOptionPane.showInputDialog( "Please enter the real part
of your first number:" );
fReal = Float.parseFloat( sReal );
sImaginary = JOptionPane.showInputDialog( "Please enter the
imaginary part of your first number:" );
fImaginary = Float.parseFloat( sImaginary );
firstComplexNumber.setReal( fReal );
firstComplexNumber.setImaginary( fImaginary );
sReal = JOptionPane.showInputDialog( "Please enter the real
part of your second number:" );
fReal = Float.parseFloat( sReal );
sImaginary = JOptionPane.showInputDialog( "Please enter the
imaginary part of your second number:" );
fImaginary = Float.parseFloat( sImaginary );
secondComplexNumber.setReal( fReal );
secondComplexNumber.setImaginary( fImaginary );
// *****this is the method call the compiler doesn't like*****
result = ComplexMath( firstComplexNumber, secondComplexNumber );
JOptionPane.showMessageDialog( null, result, "Result",
JOptionPane.INFORMATION_MESSAGE );
System.exit( 0 );
}
}
```

```
public class ComplexNumber {
private float real;
private float imaginary;
public void ComplexNumber() {
real = 0;
maginary = 0;
}
public float getReal() {
return real;
}
public float getImaginary() {
return imaginary;
}
public void setReal( float a ){
real = a;
}
public void setImaginary( float a ){
imaginary = a;
}
public String ComplexMath( ComplexNumber a, ComplexNumber b ) {
String answer = "";
float realSum = 0;
float imaginarySum = 0;
float realDifference = 0;
float imaginaryDifference = 0;
realSum = a.real + b.real;
imaginarySum = a.imaginary + b.imaginary;
realDifference = a.real - b.real;
imaginaryDifference = a.imaginary - b.imaginary;
answer += "The sum of " + a.real + " + " + a.imaginary +
"i and " + b.real + " + " + a.imaginary + "i is " + realSum + " + "
+ imaginarySum + "i.\n" + "The difference of " + a.real + " + "
+ a.imaginary + "i and " + b.real + " + " + a.imaginary + "i is "
+ realDifference + " + " + imaginaryDifference + "i.";
return answer;
}
}
```