救命啊，问题出在哪？

import java.util.*;

import java.io.*;



public class test

{



	public static void main(String[] args) //throws Exception

    {

		

		try{

			double tmpCoef;

			int tmpExpo;

			BufferedReader br = new BufferedReader(new FileReader(new File("data.txt")));

			String sLine = "";

			int flag = 0;



			

			while ((sLine = br.readLine()) != null)

			{

				//System.out.println(flag);

				String[] ss = sLine.split(" ");

				tmpCoef = Double.parseDouble(ss[0]);

				tmpExpo = Integer.parseInt(ss[1]);//  reads from the file

				//System.out.println(tmpCoef+" "+tmpExpo);



				//double absTmpCoef = absValue(tmpCoef);

				//now stores it to the polynominal

				if ( tmpExpo != 0 ||tmpCoef !=0.0  )

				{

					if (flag == 1)

					{

						//store the data into a

						System.out.println("a: "+flag);

						//a.display();

					}

					else if (flag == 2)

					{

						

						//store the data into b

						//b.addTerm(tmpCoef, tmpExpo);

						System.out.println("b: "+ flag);



					}

					else if (flag == 3)

					{

						//store the data into c

						//c.addTerm(tmpCoef, tmpExpo);

						System.out.println("c: "+ flag);

					}

					else if (flag ==4)

					{

						//store the data into d

						//d.addTerm(tmpCoef,tmpExpo);

						System.out.println("d: "+ flag);

					}

					else

					{

						break;

					}

				}

				

				

				if (tmpCoef  == 0.00 && tmpExpo == 0)

				{

					flag++;

					//continue;

				}



			}

			



		}

		

		catch(Exception e)

		{

			System.out.println("exception caught");

		

		}





    }

}