第四次上机作业

1.

1.
package javazuoye;
import java.util.Scanner;
public class Disizhouzuoye {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
        Scanner input=new Scanner(System.in);
        System.out.println("输入一个数字:");
        int x=input.nextInt();
        if(x==1||x==5||x==10)
        {
        	System.out.println("x="+ x);
        }
        else 
        {
        	System.out.println("x=none");
        }
	}

}
2.
package javazuoye;
import java.util.Scanner;
public class Disizhouzuoye {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
        Scanner input=new Scanner(System.in);
        System.out.println("输入一个数字:");
        int x=input.nextInt();
       switch(x)
       {
       case 1:
    	   System.out.println("x=" +x);
    	   break;
       case 2:
       case 3:
       case 4:
    	   System.out.println("x=none");
    	   break;
       case 5:
    	   System.out.println("x=" +x);
    	   break;
       case 6:
       case 7:
       case 8:
       case 9:
    	   System.out.println("x=none");
    	   break;
       case 10:
    	   System.out.println("x=" +x);
    	   break;
       default:
    	   System.out.println("x=none");
    	   break;
       }

	}

}
3.
package javazuoye;
import java.util.Scanner;
public class Disizhouzuoye {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
        Scanner input=new Scanner(System.in);
        System.out.println("输入一个数字:");
        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%5!=0||x%6!=0)
        {
        	System.out.println(x+"不能被5或者6整除");
        }
	}

}


4.
package javazuoye;
import java.util.Scanner;
public class Disizhouzuoye {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
        Scanner input=new Scanner(System.in);
        System.out.println("输入一个分数:");
        int x=input.nextInt();
        if(x<100&&x>=90)
        {
        	System.out.println("A");
        }
        else if(x<90&&x>=80)
        {
        	System.out.println("B");
        }
        else if(x<80&&x>=70)
        {
        	System.out.println("C");
        }
        else if(x<70&&x>=60)
        {
        	System.out.println("D");
        }
        else if(x<60&&x>=50)
        {
        	System.out.println("E");
        }
        else
        {
        	System.out.println("成绩无效");
        }
	}

}

5.
package javazuoye;
import java.util.Scanner;
public class Disizhouzuoye {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
        Scanner input=new Scanner(System.in);
        System.out.println("输入三个数:");
        
        System.out.println("输入第一个数");
        int a=input.nextInt();
        System.out.println("输入第二个数");
        int b=input.nextInt();
        System.out.println("输入第三个数");
        int c=input.nextInt();
        int m=0;
      { 
        if(a>b)
        { 
        m = a; 
        a = b ; 
        b = m; 
        } 
       if(a>c)
        { 
        m = a; 
        a = c ; 
        c = m ; 
        } 
     if(b>c)
       { 
        m = b; 
        b = c ; 
        c = m ; 
        } 
       System.out.println(a+","+b+","+c); 
	}
	}
}