第三次java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 asdf; import java.util.Scanner; public class ff { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("请输入年份"); Scanner s = new Scanner(System.in); int year = s.nextInt(); if (year < 0) { System.out.println("年份不合法"); return; } if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) { System.out.println(year + "是闰年"); } else { System.out.println(year + "不是闰年"); } } }
2.输入一个4位会员卡号,如果百位数字是3的倍数,就输出是幸运会员,否则就输出不是
package asdf; import java.util.Scanner; public class ff { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("请输入四位会员卡号"); Scanner s = new Scanner(System.in); int card = s.nextInt(); if (card >= 10000 || card < 1000) { System.out.println("输入的位数不正确"); return; } int bai = card / 100 % 10; if (bai % 3 == 0) { System.out.println("是幸运会员"); } else { System.out.println("不是幸运会员"); } } }
3.已知函数,输入x的值,输出对应的y的值.
x + 3 ( x > 0 )
y = 0 ( x = 0 )
x*2 –1 ( x <0)
package asdf; import java.util.Scanner; public class ff { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("请输入X的值"); Scanner s = new Scanner(System.in); int x = s.nextInt(); int y = 0; if (x > 0) { y = x + 3; } else if (x < 0) { y = x * 2 - 1; } System.out.println("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 asdf; import java.util.Scanner; public class ff { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("请输入三条边"); Scanner s = new Scanner(System.in); int a = s.nextInt(); int b = s.nextInt(); int c = s.nextInt(); if (a + b > c && a + c > b && b + c > a) { System.out.println("能构成三角形"); } else { System.out.println("不能构成三角形"); } } }