3.26 第4次java作业

1.编写程序, 输入变量x的值,如果是1,输出x=1,如果是5,输出x=5,如果是 10,输出 x=10,除了以上几个值,都输出x=none。(知识点:if条件语句)

package Dmh;
import java.util.Scanner;
public class zy4 {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入x的值");
        int x=sc.nextInt();
        if(x==1 || x==5 || x==10) {
            System.out.println("x="+x);
        }else {
            System.out.println("x=none");
        }
    }    
}

2.用switch结构实现第1题

package Dmh;
import java.util.Scanner;
public class zy4 {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入x的值");
        int x=sc.nextInt();
    switch(x) {
        case 1: 
        case 5: 
        case 10:System.out.println("x="+x);break;
        default:System.out.println("x=none");
        }
    }    
}

 3.判断一个数字是否能被5和6同时整除(打印能被5和6整除),或只能被5整除(打印能被5整 除),或只能被6整除,(打印能被6整除),不能被5或6整除,(打印不能被5或6整除)

package Dmh;
import java.util.Scanner;
public class zy4{
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入这个数的值");
        int x=sc.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 {
            System.out.println(x+"不能被5或6整除");
        }
    }    
}

 4..输入一个0~100的分数,如果不是0~100之间,打印分数无效,根据分数等级打印 A(90-100),B(80-89),C,D,E(知识点:条件语句if elseif)

package Dmh;
import java.util.Scanner;
public class zy4 {
    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");
        }
    }    
}

5.输入三个整数x,y,z,请把这三个数由小到大输出(知识点:条件语句)

package Dmh;
import java.util.Scanner;
public class zy4 {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入x的值");
        int x=sc.nextInt();
        System.out.println("请输入y的值");
        int y=sc.nextInt();
        System.out.println("请输入z的值");
        int z=sc.nextInt();
        if(x>y && y>z) {
            System.out.println("输出"+z+","+y+","+x);
        }else if(x>z && z>y) {
            System.out.println("输出"+y+","+z+","+x);
        }else if(y>x && x>z) {
            System.out.println("输出"+z+","+x+","+y);
        }else if(y>z && z>x) {
            System.out.println("输出"+x+","+z+","+y);
        }else if(z>y && y>x) {
            System.out.println("输出"+x+","+y+","+z);
        }else if(z>x && x>y) {
            System.out.println("输出"+y+","+x+","+z);
        }
    }    
}

 

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