java：设计一个名为Complex的复数类来表示复数以及完成复数的运算

预览如下：



Complex类：

package num;public class Complex {double a;double b;public Complex(double x,double y){a=x;b=y;}public static Complex add(Complex x,Complex y){Complex ans = new Complex(x.a+y.a,x.b+y.b);return ans;}public static Complex sub(Complex x,Complex y){Complex ans = new Complex(x.a-y.a,x.b-y.b);return ans;}public static Complex mul(Complex x,Complex y){Complex ans = new Complex(x.a*y.a-x.b*y.b,x.a*y.b+x.b*y.a);return ans;}public static Complex div(Complex x,Complex y){Complex ans = new Complex((x.a*y.a+x.b*y.b)/(y.a*y.a+x.b*y.b),(x.a*y.b-x.b*y.a)/(y.a*y.a+x.b*y.b));return ans;}public static void print(Complex ans){if(ans.b>=0)System.out.println(ans.a+"+"+ans.b+"i");elseSystem.out.println(ans.a+""+ans.b+"i");}
}

主类：

package num;import java.util.Scanner;public class Complexmain {public static void main(String[] args) {// TODO Auto-generated method stubScanner scan = new Scanner(System.in);Complex x = new Complex(scan.nextDouble(),scan.nextDouble());Complex y = new Complex(scan.nextDouble(),scan.nextDouble());Complex z = Complex.add(x,y);System.out.print("加法运算：");Complex.print(z);Complex z1 = Complex.sub(x,y);System.out.print("减法运算：");Complex.print(z1);Complex z2 = Complex.mul(x,y);System.out.print("乘法运算：");Complex.print(z2);Complex z3 = Complex.div(x,y);System.out.print("除法运算：");Complex.print(z3);}}

小记

假如可以，最好是携一人终老，结婚而定。那个绅士说的：这就够了。希望可以一直提醒着我，这就够了。

即使明天是世界末日，我们也要穿着得体，这是一种生活态度。