package bwk2; import java.util.Scanner; public class Zye { public static void main(String[] args) { // 1.输入一个年份,判断是不是闰年(可以被4整除但不能被100整除,或者能被400整除 System.out.println("请输入一个年份:"); Scanner sc = new Scanner(System.in); int a = sc.nextInt(); if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0)) { System.out.println(a+"年是闰年"); }else { System.out.println(a+"年不是闰年"); } } }
package bwk2; import java.util.Scanner; public class Zye { public static void main(String[] args) { // 2.输入一个4位会员卡号 如果百位数字是3的倍数 输出幸运会员,否则就不是. System.out.print("请输入会员卡号:"); Scanner sc = new Scanner(System.in); int a = sc.nextInt(); if (a >= 1000 && a <=9999) { if(a / 100 % 10 % 3 == 0) { System.out.println(a+"是幸运会员"); }else {System.out.println(a+"不是幸运会员");} }else {System.out.println("您的输入有误");} } }
package bwk2; import java.util.Scanner; public class Zye { public static void main(String[] args) { // 已知函数 x 输出y x>0 (x+3) x=0 y=0 x<0 x*2-1 Scanner sc = new Scanner(System.in); System.out.print("请输入x的值:"); int x = sc.nextInt(); int y; if(x > 0) { y = x + 3; System.out.println("y值为:"+y); }if(x < 0) { y = x*2 - 1; System.out.println("y值为:"+y); }if(x == 0){ y = 0; System.out.println("y值为:"+y); } } }
package bwk2; import java.util.Scanner; public class Zye { public static void main(String[] args) { //4. 输入三个数 构成三角形 Scanner sc = new Scanner(System.in); System.out.print("请输入第一个数:"); int a = sc.nextInt(); System.out.print(" 请输入第二个数:"); int b = sc.nextInt(); System.out.print(" 请输入第三个数:"); int c = sc.nextInt(); if((a + b) >= c && (a + c) >= b && (b + c) >= a){ System.out.println("可构成三角形"); }else { System.out.println("不可以构成三角形");} } }