I only add the two sentence as I marked,Then I get a runtime error.Help me,Thank you.
import java.io.*;
import java.util.*;
public class Main
{
            public static void main(String args[]) throws Exception
            {
            	    Scanner cin=new Scanner(System.in);
                    for(;;)//here
                    {
                    	if(cin==null) break;//here
                    	int a=cin.nextInt();
                    	int b=cin.nextInt();
                        System.out.println(a+b);	
                    }
            }
}

• Re:Being a fresh man,I don't know why. (606) LINSCNU 2006-11-30 16:00:59