java2实用教程102小程序（分数计算和流水线计算

import java.util.Scanner;
public class test{
    public static void main(String args[]){
        Rational a=new Rational(4,5);
        Rational b=new Rational(3,2);
        Rational c=a.chu(b);
        c.show();
    }
}

class Rational{
    int fenzi=1;
    int fenmu=1;
    int f(int a,int b){//公约数
        if(b>a){
            int c=a;
            a=b;
            b=c;
        }
//        System.out.println(a);
        int c=a%b;
        for(;c!=0;c=a%b){
            a=b;
            b=c;
        }
        return b;
        }
    Rational(int a,int b){
        int c=f(Math.abs(a),Math.abs(b));
        fenzi=a/c;
        fenmu=b/c;
        System.out.println(c);
    }
    Rational jia(Rational r){
        int a=fenzi*r.fenmu+r.fenzi*fenmu;
        int b=fenmu*r.fenmu;
//        System.out.println(b);
        Rational c=new Rational(a,b);
        return c;
    }
    Rational jian(Rational r){
        int a=fenzi*r.fenmu-r.fenzi*fenmu;
        int b=fenmu*r.fenmu;
//        System.out.println(b);
        Rational c=new Rational(a,b);
        return c;
    }
    Rational cheng(Rational r){
        int a=fenzi*r.fenzi;
        int b=fenmu*r.fenmu;
        Rational c=new Rational(a,b);
        return c;
    }
    Rational chu(Rational r){
        int a=fenzi*r.fenmu;
        int b=fenmu*r.fenzi;
        Rational c=new Rational(a,b);
        return c;
    }
    void show(){
        System.out.println(fenzi+"/"+fenmu);
    }
}

import java.util.Scanner;
public class test{
    public static void main(String args[]){
        Line a=new Line();
        a.work();
    }
}

class Input{
    Del b;
    Input(Del a){
        b=a;
    }
    void work(){
        System.out.println("多少个评委");
        Scanner in=new Scanner(System.in);
        int num=in.nextInt();
        System.out.println("分别给了多少分");
        double a[]=new double[num];
        for(int i=0;i<num;i++){
            a[i]=in.nextDouble();
        }
        b.del(a);
    }
}

class Del{
    Count b;
    Del(Count a){
        b=a;
    }
    void del(double a[]){
        java.util.Arrays.sort(a);
        double b[]=new double[a.length-2];
        for(int i=1;i<=b.length;i++){
            b[i-1]=a[i];
        }
        this.b.count(b);
    }
}

class Count{
    void count(double a[]){
        double num=0;
//        for(int i=0;i<a.length;i++){
//            System.out.println(a[i]);
//        }
        for(int i=0;i<a.length;i++){
            num+=a[i];
        }
        double c=num/a.length;
        System.out.println(c);
    }
}

class Line{
    Input a;
    Del b;
    Count c;
    Line(){
        c=new Count();
        b=new Del(c);
        a=new Input(b);
    }
    void work(){
        a.work();
    }
}