尚学堂第二章作业题答案

╰半橙微兮° 2022-01-22 01:25 266阅读 0赞

一、选择题  
[1.CD][] 2.C 3.D 4.AB 5.AB  
二、简答题  
见各章节内容  
三、编程题  
1.

package com.test1;
    
    import java.util.Scanner;
    
    public class ComputCircle {
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		System.out.println("请输入圆的半径：");
    		double r = scanner.nextDouble();
    		System.out.println("该圆的半径为：R="+ r);
    		double C = 2*3.14*r;
    		System.out.println("该圆的周长为：C="+"2*3.14*"+r+"="+C);
    		double S = 3.14*r*r;
    		System.out.println("该圆的面积为：S=3.14*"+r+"*"+r+"="+S);
    	}
    }

package com.test1;
    
    import java.util.Scanner;
    
    public class Save {
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		System.out.println("请输入本金金额：");
    		float pay = scanner.nextFloat();
    		int total1 = (int)Math.round(pay*0.0035+pay);
    		int total2 = (int)Math.round(pay*0.015+pay);
    		int total3 = (int)Math.round(pay*0.0035*2+pay);
    		int total4 = (int)Math.round(pay*0.021*2+pay);
    		System.out.println("活期1年本息总计："+total1);
    		System.out.println("定期1年本息总计："+total2);
    		System.out.println("活期2年本息总计："+total3);
    		System.out.println("定期2年本息总计："+total4);
    	}
    }

package com.test1;
    
    import java.util.Scanner;
    
    public class Swap {
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		System.out.println("请输入一个四位整数：");
    		int a = scanner.nextInt();
    		int a4 = ((a%10)+5)%10;
    		int a3 = ((a%100/10)+5)%10;
    		int a2 = ((a%1000/100)+5)%10;
    		int a1 = ((a%10000/1000)+5)%10;
    		int b = a4*1000+a3*100+a2*10+a1;
    		
    		System.out.println(b);
    		
    	}
    }

以上答案仅供参考，谢谢

[1.CD]: http://1.CD