10.19（周四）

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package 复数;class Complex{    public int x;    public int y;        public Complex(){        this.x = 0;        this.y = 0;    }        public Complex(int x, int y){        this.x = x;        this.y = y;    }        public void showComp(){        if(this.y !=0){            if(this.y > 0){                System.out.println(this.x + "+" + this.y + "i");            }            else{                System.out.println(this.x + "-" + this.y + "i");            }                    }        else{                System.out.println(this.x);        }    }        public Complex addComp(Complex C1,Complex C2){            Complex re = new Complex();        re.x = C1.x+C2.x;        re.y = C1.y+C2.y;        re.showComp();        return re;                //return new Complex(C1.x+C2.x, C1.y+C2.y);            }        public Complex sulComp(Complex C1,Complex C2){            Complex re = new Complex();        re.x = C1.x - C2.x;        re.y = C1.y - C2.y;        re.showComp();        return re;        // return new Complex(C1.x-C2.x, C1.y-C2.y);            }        public Complex multiComp(Complex C1,Complex C2){        Complex re = new Complex();        re.x = (C1.x * C2.x - C1.y * C2.y);        re.y = (C1.x * C2.y + C1.y * C2.x);        re.showComp();        return re;        //return new Complex((C1.x * C2.x - C1.y * C2.y) , (C1.x * C2.y + C1.y * C2.x));    }        public boolean equalComp(Complex C1,Complex C2){        if(C1.equals(C2)){            System.out.println("相等");            return true;        }        return false;    }}public class Fushu {    public static void main(String[] args){        Complex num1 = new Complex(3, 5);         Complex num2 = new Complex(7, 8);        Complex num3 = new Complex();                        num1.showComp();        num2.showComp();                num3.addComp(num1, num2);        num3.sulComp(num1, num2);        num3.multiComp(num1, num2);        num3.equalComp(num1, num2);    }}

package的用法

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