第二次上机作业

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 Tsst;

import java.util.*;

public class Bss {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("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.switch结构实现第1题

package Tsst;

import java.util.*;

public class Bss {
    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:
            System.out.println("x=1");
            break;
        case 5:
            System.out.println("x=5");
            break;
        case 10:
            System.out.println("x=10");
            break;
        default:
            System.out.println("x=none");
            break;
        }
    }
}

 

 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 Tsst;

import java.util.*;

public class Bss {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("输入数的值");
        int x = sc.nextInt();
        if (x % 5 == 0) {
            System.out.println(x + "只能被5整除");
        } else if (x % 6 == 0) {
            System.out.println(x + "只能被6整除");
        } else if (x % 5 == 0 && x % 6 == 0) {
            System.out.println(x + "只被5和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 Tsst;

import java.util.*;

public class Bss {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个0-100之间的数");
        int x = sc.nextInt();
        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");
        } else if (x < 0 || x > 100) {
            System.out.println("打印的分数无效");
        }
    }
}

 

 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 Tsst;

import java.util.*;

public class Bss {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入x,y,z三个整数");
        int x = sc.nextInt();
        int y = sc.nextInt();
        int z = sc.nextInt();

        if (x < y) {
            int a = x;
            x = y;
            y = a;
        }
        if (x < z) {
            int a = x;
            x = z;
            z = a;
        }
        if (y < z) {
            int a = y;
            y = z;
            z = a;
        }
        System.out.println(z + " " + y + " " + x);
    }
}

 

posted @ 2020-03-26 12:23  计算机18  阅读(132)  评论(0编辑  收藏  举报