第四次上机作业

1.

package xx;

import java.util.Scanner;

public class pika {

public static void main(String[] args) {
Scanner in =new Scanner(System.in);
int a = in.nextInt();
if(a==1 || a==5 || a==10) {
System.out.println("x="+a);
}else {
System.out.println("x=none");

}
}
}

2.

package xx;

import java.util.Scanner;

public class pika {

    public static void main(String[] args) {
        Scanner in =new Scanner(System.in);
        int a = in.nextInt();
        switch(a) {
        case 1:
        case 5:
        case 10:
            System.out.println("x="+a);
            break;
            default:System.out.println("x=none");
        }
    }

}
3.

package xx;

import java.util.Scanner;

public class pika {

    public static void main(String[] args) {
        Scanner s = new Scanner (System.in);
        System.out.print ("请输入一个数: ");
        int i = s.nextInt();
        if (i%5==0 && i%6==0) {
            System. out.println (i+"能同时被5和6整除");
        }
            else if(i%5==0) {
            System. out.println(i+"能只被5整除");
            }
            else if (i%6==0) {
            System. out.println(i+"能只被6整除");
            }
            else {
            System. out.println(i+"不能被5和6整除");
        }
    }

}
4.

package xx;

import java.util.Scanner;

public class pika {

    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入分数的值");
        int x=sc.nextInt();
        if(x<0 || x>100) {
            System.out.println("打印分数无效");
        }else if(x/10>=9 && x/10<=10) {
            System.out.println("A");
        }else if(x/10>=8 & x/10<9) {
            System.out.println("B");
        }else if(x/10>=7 & x/10<8) {
            System.out.println("C");
        }else if(x/10>=6 & x/10<7) {
            System.out.println("D");
        }else if(x/10<6) {
            System.out.println("E");
        }
    }

}