java第四次作业
1.输入一个年份,判断是不是闰年(能被4整除但不能被100整除,或者能被400整除)
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.print("请输入一个年份"); int a=input.nextInt(); if (a%4==0&&a%100!=0||a%400==0) { System.out.print("此年是闰年"); }else { System.out.print("此年不是闰年"); } } }
2.输入一个4位会员卡号,如果百位数字是随机数,就输出是幸运会员,否则就输出不是.
package com; import java.util.Random; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.print("请输入一个四位数"); int c=input.nextInt(); int b; Random r=new Random(); int a=r.nextInt(10); b=c/10%10; if (a==b) { System.out.print("是幸运会员"); }else { System.out.print("不是幸运会员"); } } }
3.已知函数,输入x的值,输出对应的y的值.
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.print("请输入x的值"); double x=input.nextDouble(); double y; if (x>0) { y=x+3; }else if (x==0) { y=0; }else { y=x*2-1; } System.out.print("y的值为"+y); } }
4.输入三个数,判断能否构成三角形(任意两边之和大于第三边)
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.print("请输入边长a的值"); double a=input.nextDouble(); System.out.print("请输入边长b的值"); double b=input.nextDouble(); System.out.print("请输入边长c的值"); double c=input.nextDouble(); if (a<b+c&&b<a+c&&c<a+b) { System.out.print("可以构成三角形"); }else { System.out.print("不可以构成三角形"); } } }
1 输入年份月份,输出该月的天数(闰年2月29天,条件参考上机练习1)
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.print("请输入月份"); int m = input.nextInt(); if(m==1||m==3||m==5||m==7||m==8||m==10||m==12){ System.out.println("31天"); }else if(m==2){ System.out.println("29天"); }else{ System.out.println("30天"); } } }
2、给定一个成绩a,使用switch结构求出a的等级
。A:90-100,B:80-89,C:70-79,D:60-69,E:0~59
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.print("请给定成绩"); int a=input.nextInt(); switch (a) { case 90: case 91: case 92: case 93: case 94: case 95: case 96: case 97: case 98: case 99: case 100: System.out.println("A等级"); break; case 80: case 81: case 82: case 83: case 84: case 85: case 86: case 87: case 88: case 89: System.out.println("B等级"); break; case 70: case 71: case 72: case 73: case 74: case 75: case 76: case 77: case 78: case 79: System.out.println("C等级"); break; case 60: case 61: case 62: case 63: case 64: case 65: case 66: case 67: case 68: case 69: System.out.println("D等级"); break; default: System.out.println("E等级"); break; } } }
3、输入一个数字,判断是一个奇数还是偶数
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("输入一个数"); int a = input.nextInt(); if (a%2 == 0) { System.out.println("这是偶数"); } else { System.out.println("这是奇数"); } } }
4、编写程序, 判断一个变量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。
package com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("输入一个数"); int x = input.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"); } } }
5、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 com; import java.util.Scanner; public class Test5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("输入一个数字"); int a = input.nextInt(); if (a % 5 == 0 && a % 6 == 0) { System.out.println("能被5和6整除"); } else if (a % 5 == 0) { System.out.println("能被5整除"); } else if (a % 6 == 0) { System.out.println("能被6整除"); } else { System.out.println("不能被5或6整除"); } } }
posted on 2021-03-28 15:11 HumbleSwag 阅读(34) 评论(0) 编辑 收藏 举报