> 我用Java写的，错了好几次了，不知道为什么。
> import java.io.*;
> import java.util.*;
> 
> public class Main
> {
> 	public static void main(String[] args[]) throws Exception
> 	{
> 		Scanner cin = new Scanner(System.in);
>                 
> 		int number1 = cin.nextInt();
> 		int number2 = cin.nextInt();
> 		if(number1>=0 && number1<=10 && number2>=0 && number2<=10)
> 			System.out.println(number1+number2);
> 	}
> }