• 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 a;

    import java.util.*;

    public class aa {

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

    }


    2.用switch结构实现第1题

    package a;

    import java.util.*;

    public class aa {

    public static void main(String[] args) {
    // TODO Auto-generated method stub
    Scanner sc = new Scanner(System.in);
    System.out.println("输入x的值:");
    int i = sc.nextInt();
    switch (i) {
    case 1:
    System.out.println("x=" + i);
    break;
    case 5:
    System.out.println("x=" + i);
    break;
    case 10:
    System.out.println("x=" + i);
    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 a;

    import java.util.*;

    public class aa {

    public static void main(String[] args) {
    // TODO Auto-generated method stub
    Scanner sc = new Scanner(System.in);
    System.out.println("输入x的值:");
    int i = sc.nextInt();
    if (i%5==0&&i%6==0) {
    System.out.println("能被5和6整除");
    }else if (i%5==0) {
    System.out.println("能被5整除");
    }else if (i%6==0) {
    System.out.println("能被6整除");
    }else{
    System.out.println("不能被5和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 a;

    import java.util.*;

    public class aa {

    public static void main(String[] args) {
    // TODO Auto-generated method stub
    Scanner sc = new Scanner(System.in);
    System.out.println("输入0~100的成绩:");
    double i = sc.nextDouble();
    if (i <= 100 && i > 90) {
    System.out.println("成绩为A");
    } else if (i < 90 && i > 80) {
    System.out.println("成绩为B");
    } else if (i < 80 && i > 70) {
    System.out.println("成绩为C");
    } else if (i < 70 && i > 60) {
    System.out.println("成绩为D");
    } else if (i < 60) {
    System.out.println("成绩为E");
    } else {
    System.out.println("输入成绩不符合规定");
    }
    }
    }


    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 a;

    import java.util.*;

    public class aa {

    public static void main(String[] args) {
    // TODO Auto-generated method stub
    Scanner sc = new Scanner(System.in);
    System.out.println("输入三个数字");
    double a, b, c, t;
    a = sc.nextDouble();
    b = sc.nextDouble();
    c = sc.nextDouble();
    if (a > b) {
    t = b;
    b = a;
    a = t;
    }
    if (a > c) {
    t = c;
    c = a;
    a = t;
    }
    if (b > c) {
    t = c;
    c = b;
    b = t;
    }
    System.out.println(a+" "+b+" "+c);
    }
    }

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  • 原文地址:https://www.cnblogs.com/sigure0428/p/12573133.html
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