JAVA第三周作业0319

作业
1.输入商品单价，数量，求总价。活动8折后抹零，计算活动价。
输入付款金额，计算找零并输出

 1 package homwork;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Exe3_1 {
 6 
 7     /**
 8      * @param args
 9      */
10     public static void main(String[] args) {
11         // 1.输入商品单价，数量，求总价。活动8折后抹零，计算活动价。输入付款金额，计算找零并输出
12         Scanner input = new Scanner(System.in);
13         double ubitPrice ;  //ubitPrice 单价
14         double amount ; // amount 数量、重量
15         double totalPrices ; //totalPrices 总价
16         double discountPrice ; //discountPrice 折扣价格
17         double receipt ; //receipt 收款
18         double change ; //change 找零
19         System.out.print("请输入商品单价：");
20         ubitPrice = input.nextDouble() ;
21         System.out.print("请输入商品数量：");
22         amount = input.nextDouble() ;
23         totalPrices = ubitPrice * amount ;
24         System.out.print("商品总价：" + totalPrices + "元"); System.out.println();
25         discountPrice = (int) (totalPrices * 0.8) ;
26         System.out.println("8折抹零：" + discountPrice + "元");
27         System.out.print("请输入收款金额:");
28         receipt = input.nextDouble();
29         change = receipt - discountPrice ;
30         System.out.println("找零:" + change + "元");
31 
32             }
33 
34 }

 

package text;

import java.util.Scanner;

public class Text {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        double danj ,shul ,zongj ,zhej ,shouk ,zhaol;
        //        单价   数量    总价        折价       收款    找零    
        System.out.println("请输入商品单价:");
        danj = input.nextDouble();
        System.out.println("请输入商品重量/数量:");
        shul = input.nextDouble();
        zongj = danj + shul;
        System.out.println("商品总价:"+zongj);
        zhej = zongj *0.8;
        System.out.println("商品8.0折后价格:"+String.format("%.2f", zhej));
        // String.format("%.2f", f)   保留两位小数
        System.out.println("请输入收款金额:");
        shouk = input.nextDouble();
        zhaol = shouk -zhej;
        System.out.println("找零 :"+ zhaol +"元");
        
        
    }

}
折价保留两位小数211026

 

 

 

 

2.输入一个三位数，求个位，十位和百位。

 1 package homwork;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Exe3_2 {
 6     public static void main(String[] args) {
 7         //2.输入一个三位数，求个位，十位和百位。
 8         Scanner input = new Scanner(System.in);
 9         System.out.println("请输入一个三位数：");
10         int num = input.nextInt();
11         int ge = num % 10;
12         int shi = num % 100 / 10;
13         int bai = num % 1000 / 100;
14         System.out.println(num + ":");
15         System.out.println("百位是" + bai);
16         System.out.println("十位是" + shi);
17         System.out.println("个位是" + ge);
18     }
19 
20 }

 

 

3.输入大写字母，转成对应的小写字母

 1 package homwork;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Exe3_3 {
 6     public static void main(String[] args) {
 7         //3.输入大写字母，转成对应的小写字母
 8         Scanner input = new Scanner(System.in);
 9         System.out.println("请输入一个大写字母：");
10         char D = input.next().charAt(0);
11         System.out.print(D + "的小写是：");
12         char x = (char)(D + 32);
13         System.out.println(x);
14     }
15 
16 }

 

 

4.输入2个数，用三目运算符，输出较大数

 1 package homwork;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Exe3_4 {
 6     public static void main(String[] args) {
 7         //4.输入2个数，用三目运算符，输出较大数
 8         Scanner input = new Scanner(System.in);
 9         double a , b ;
10         System.out.println("请输入两个数：");
11         System.out.print("a=");
12         a = input.nextDouble();
13         System.out.print("b=");
14         b = input.nextDouble();
15         System.out.println("max=" + (a>b?a:b));
16     }
17 }

 

posted @ 2021-03-20 22:17  L'童话故事  阅读(55)  评论(0)  编辑  收藏  举报