JAVA，

JAVA，

1.判断某一年是闰年？
import java.util.Scanner;
public class W {
public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
System.out.print(“请输入年:”);
int year=scan.nextInt();
if(year%40 && year%100!=0){
System.out.print(“该年是闰年!”);
}else
if(year%4000){
System.out.print(“该年是闰年!”);
}else
{
System.out.print(“该年不是闰年!”);
}
scan.close();
}
}

2.输出成绩等级？
import java.util.Scanner;
public class Z {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int score = scan.nextInt();
if (score < 0 || score > 100) {
System.out.println(“你的成绩！”);
} else if (score >= 90) {
System.out.println(“优秀”);
} else if (score >= 80) {
System.out.println(“良好”);
} else if (score >= 60) {
System.out.println(“及格”);
} else {
System.out.println(“不及格”);
}
}
}