第三次作业
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)
import java.util.Scanner;
public class ydy {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入年份:");
int a = input.nextInt();
if (a % 4 == 0 && a % 100 != 0 || a % 400 ==0) {
System.out.println("是闰年");
} else {
System.out.println("不是闰年");
}
// TODO Auto-generated method stub
}
}
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.
import java.util.Scanner;
public class ydy {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入四位会员卡号:");
int a = input.nextInt();
if ((a % 1000 / 100) % 3 == 0 ) {
System.out.println("是幸运会员");
} else {
System.out.println("不是幸运会员");
}
// TODO Auto-generated method stub
}
}
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 )
1 package tset; 2 import java.util.Scanner; 3 public class demo { 4 public static void main(String[] args) { 5 Scanner input = new Scanner(System.in); 6 System.out.println("请输入x的值(整数):"); 7 int x = input.nextInt(); 8 int y; 9 if(x > 0) { 10 y = x + 3; 11 System.out.println("y的值是:" + y); 12 }else if(x == 0) { 13 System.out.println("y的值是:0"); 14 }else if(x < 0) { 15 y = x * x - 1; 16 System.out.println("y的值是:" + y); 17 } 18 19 } 20 21 }
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)
请在博客园班级提交,截止时间下周三中午12点.
import java.util.Scanner;
public class ydy {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入三角形的三边(整数):");
int a = input.nextInt();
int b = input.nextInt();
int c = input.nextInt();
int d = a + b;
int e = a + c;
int f = b + c;
if(d > c && e > b && f > a) {
System.out.println("能构成三角形");
} else {
System.out.println("不能构成三角形");
}
}
}