第二次上机作业

第一题

package test;

import java.util.Scanner;

public class hhh {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner input=new Scanner(System.in);
		System.out.println("请输入一个数");
		int x=input.nextInt();
		if(x==5||x==1||x==10)
			System.out.println("x的值为"+x);
		else
			System.out.println("x=none");
		
		
				
	}
}

　　

 

 第二题

package test;

import java.util.Scanner;

public class hhh {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner input=new Scanner(System.in);
		System.out.println("请输入一个数");
		int x=input.nextInt();
		switch(x){
		case 1:
		System.out.println("x的值为"+x);
		break;
		case 5:
			System.out.println("x的值为"+x);
			break;
		case 10:
			System.out.println("x的值为"+x);
			break;
			default:
				System.out.println("x=none");
				break;
		}
	}
}

　　

 

 第三题

package test;

import java.util.Scanner;

public class hhh {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner input=new Scanner(System.in);
		System.out.println("请输入一个数");
		int x=input.nextInt();
		if(x%5==0&&x%6==0)
			System.out.println("x能被5和6整除");
		else if(x%5==0)
			System.out.println("x能被5整除");
		else if(x%6==0)
			System.out.println("x能被6整除");
		else if(x%6!=0||x%5!=0)
			System.out.println("x不能被5或6整除");
		}
	}

　　

 

 

第四题

 

package test;

import java.util.Scanner;

public class hhh {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner input=new Scanner(System.in);
		System.out.println("请输入一个0-100的分数");
		int x=input.nextInt();
		if(x>=90&&x<=100)
			System.out.println("A");
		else if(x>=80&&x<=90)
			System.out.println("B");
		else if(x>=70&&x<=80)
			System.out.println("C");
		else if(x>=60&&x<=70)
			System.out.println("D");
		else if(x>=50&&x<=60)
			System.out.println("E");
		else if(x<0||x>100)
			System.out.println("值不和法分数无效");
			
			
		
		}
	}

　　

 

 

第5题

package test;

import java.util.Scanner;

public class hhh {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner input=new Scanner(System.in);
		System.out.println("请输入3个数");
		int x=input.nextInt();
		int y=input.nextInt();
		int z=input.nextInt();
		if(x>y&&y>z)
			System.out.println("从大到小"+x +y +z);
		else if(y>x&&x>z)
			System.out.println("从大到小"+y +x +z);
		else if(z>x&&x>y)
			System.out.println("从大到小"+z +x +y);
		else if (x>z&&z>y)
		System.out.println("从大到小"+x +z +y);
		else if(y>z&&z>x)
			System.out.println("从大到小"+y +z +x);
		else if(z>y&&y>x)
			System.out.println("从大到小"+z +y +x);
		
			
		
		}
	}