CQUPTJava平时作业02

直接在主程序中调用对应题目的函数即可

package javalesson;

import java.util.EnumSet;
import java.util.Scanner;



//  1. B  2.B    3.D 
public class Work02 {
	static 	Scanner in = new Scanner(System.in);
	public static void main(String[] args) {
		System.out.println("Please input the first number:");
		int a = in.nextInt();
		System.out.println("Please input the second number:");
		int b = in.nextInt();
		System.out.println("Please input the third number:");
		int c = in.nextInt();
		System.out.println("The maximum number is:"+Math.max(Math.max(a, b), c));
		
	}
	public static boolean judgeSuShu(int num) {
		for(int i = 2 ; i <= Math.sqrt((double)num);++i) {
			if(num % i == 0)	return false;
		}
		return true;
	}
	// 1 
	public static void wanshu() {
		int n = in.nextInt();
		int m = in.nextInt();
		System.out.println(n+" to "+m+" WanShu:");
		for(int i = n ; i<= m ; ++i) {
			int sum = 0;
			for(int j = 1 ; j < i ; ++j) {			if(i%j==0) sum+=j;
			}
			if(sum==i)  System.out.print(i+",");
		}

	}
	//2
	public static void upperC() {
		String s = in.nextLine();
		System.out.println("result:"+s.toUpperCase());
	}
	//3
	public static void threeInt() {
		int a = in.nextInt();
		int b = in.nextInt();
		int c = in.nextInt();
		System.out.println("sum="+(double)(a+b+c));
		System.out.println("average="+(a+b+c)/3.0);
	}
	// 4
	public static void keNiSuShu() {
		int num = in.nextInt();
		int num2 = Integer.parseInt(new StringBuilder(String.valueOf(num)).reverse().toString());
		if(judgeSuShu(num2)&&judgeSuShu(num))	System.out.println("yes");
		else System.out.println("no");
	}
}
  
//  javalesson.Work01