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.用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); } }