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第二次作业+105032014033

1.测试代码连接:http://www.cnblogs.com/5257yu/p/6601603.html

2.提出的建议:

  1)该代码没有按照要求将结果作为字符串输出。

  2)使用 if 时,应当确保判断条件内所有的范围都能涉及到, if 后面应当接else或者else if。

3.修改后代码:

import java.util.Scanner;

public class Yongjin01 {
    public double Input(double number){
        double num = 0;
        Scanner scanner = new Scanner(System.in);
     try{
        if(num<0){
            System.out.println("输入的数量不满足要求!");
            
        }else{
            num = scanner.nextDouble();
            return num;
        }
     }catch(Exception e){System.out.println("输入不合法!");}
        return num;
                
    }
    public double Commission(double headphone,double shell,double protector){
        double commission = 0;  
        double headphonePrice = 80;
        double shellPrice = 10;
        double protectorPrice = 8;
        double headphonesales = headphonePrice*headphone;
        double shellsales = shellPrice*shell;
        double protectorsales = protectorPrice*protector;
        double sales  = headphonesales+shellsales+protectorsales;
        if(sales>1800){
            commission = 0.10*1000;
            commission = commission+0.15*800;
            commission = commission+0.20*(sales-1800);
        }else if(sales>1000){
            commission = 0.10*1000;
            commission = commission+0.15*(sales-1000);
        }
        else 
            commission = 0.10*sales;
        
        return commission;
    }
}
public class ruance2 {
    public static void main(String[] args) {
        while(true){
        Yongjin01 yj = new Yongjin01();
        System.out.println("请分别输入三种手机配件的销售情况:");
        double headphone = yj.Input(0);
        double shell = yj.Input(0);
        double protector = yj.Input(0);
        System.out.println("耳机数量:" + headphone + "\n手机壳数量:" + shell
                + " \n手机贴膜数量:" + protector);
        double commission = yj.Commission(headphone, shell, protector);
        System.out.println("销售佣金:" + commission);
    }
}
}

4.心得体会

根据测试者的建议增加了else if判定,解决了输入数较小是出现负数的问题,改进了程序的功能,能够符合题意,符合实际。

第二次作业+105032014033