School‘s Java test

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推荐文章：题目大解析（3）

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第四周

素数和

import java.util.Scanner;
public class Main {
	static public boolean IsPrime(int n)
	{
		if(n>1) {
			for(int i = 2;i<n;i++)
			{
				if(n%i==0)
					return false;
			}
			return true;
		}
		return false;
	}
	
	public static void main(String args[]) {
		int n,m;
		Scanner input = new Scanner(System.in);
		n = input.nextInt();
		m = input.nextInt();
		int[] arr = new int[m-n+1];
		//输入数据
		int sum = 0,count = 0,i=2;
		while(count<m) {
			if(IsPrime(i))
				count++;
			if(IsPrime(i)&&count>=n)
			{
				sum+=i;
			}
			
			++i;
		}
		System.out.println(sum);
	}
}

念整数

import java.util.Scanner;
public class Main {
	
	public static void main(String args[]) {
		String n = new Scanner(System.in).nextLine();
		String[] str = {"ling","yi","er","san","si","wu","liu","qi","ba","jiu"};
		for(int i = 0;i<n.length();i++)
		{
			int index = n.charAt(i) - '0';
			if(i==0&&n.charAt(0)=='-')
				System.out.print("fu");
			else
			{
				if(i==0)
				System.out.print(str[index]);
				else
				System.out.print(" "+str[index]);
			}
		}
		
	}
}

真心不喜欢java