java设计，请各位高手帮帮忙！

Question

一个复数Complex由两部分组成：实部realPart和虚部imaginaryPart,两个复数可进行加、减、乘、除四则运算。试设计一个带有四则运算的复数类，并编写主程序演示该类的用法。

Answer 1

public class Fushu {

private int realPart;

private int imaginaryPart;

public Fushu(int real, int imaginary) {
realPart = real;
imaginaryPart = imaginary;
}

public static void main(String[] args) {

Fushu fushu1 = new Fushu(6, 3);
Fushu fushu2 = new Fushu(1, 1);

System.out.println("+++++ " + add(fushu1, fushu2));
System.out.println("----- " + reduce(fushu1, fushu2));
System.out.println("***** " + multi(fushu1, fushu2));
System.out.println("//// " + div(fushu1, fushu2));

}

/// +++++++++++
public static Fushu add(Fushu fushu1, Fushu fushu2){

int real = fushu1.getRealPart() + fushu2.getRealPart();
int imag = fushu1.getImaginaryPart() + fushu2.getImaginaryPart();

return new Fushu(real, imag);
}

// --------------
public static Fushu reduce(Fushu fushu1, Fushu fushu2){
int real = fushu1.getRealPart() - fushu2.getRealPart();
int imag = fushu1.getImaginaryPart() - fushu2.getImaginaryPart();

return new Fushu(real, imag);
}

// **********
public static Fushu multi(Fushu fushu1, Fushu fushu2){

int real = (fushu1.getRealPart() * fushu2.getRealPart())
- (fushu1.getImaginaryPart() * fushu2.getImaginaryPart());
int imag = fushu1.getRealPart() * fushu2.getImaginaryPart()
+ fushu2.getRealPart() * fushu1.getImaginaryPart();

return new Fushu(real, imag);
}

// ///////////////
public static Fushu div(Fushu fushu1, Fushu fushu2){
int real1 = fushu1.getRealPart();
int real2 = fushu2.getRealPart();
int image1 = fushu1.getImaginaryPart();
int image2 = fushu2.getImaginaryPart();

int real = (real1 * real2 + image1 * image2) / (real2* real2 + image2*image2);
int image = (real2 * image1 - real1 * image2) / (real2* real2 + image2*image2);

return new Fushu(real, image);
}

public int getImaginaryPart() {
return imaginaryPart;
}

public void setImaginaryPart(int imaginaryPart) {
this.imaginaryPart = imaginaryPart;
}

public int getRealPart() {
return realPart;
}

public void setRealPart(int realPart) {
this.realPart = realPart;
}
}