import java.io.*;
import java.lang.*;
//Testing tank by reading values to be added or removed from a data file
public class testNormal2 {
  public static void main(String[] argn) {
    try {
      String text;
      Tank t = new Tank();
      BufferedReader inp   = new BufferedReader(new InputStreamReader(System.in));
      System.out.print("Enter File Name:");
      String fname = inp.readLine();
      InputStream ist = new FileInputStream(fname);
      BufferedReader  istream   = new BufferedReader(new InputStreamReader(ist));
      text = istream.readLine();
      while(text != null) {
        double am = (Double.valueOf(text)).doubleValue();
        if (am > 0.0) {
          t.add(am);
          System.out.println("tank content after adding "+ am + " = "+
                             t.content());
        }
        else {
          t.remove(-am);
          System.out.println("tank content after removing "+ -am + " = "+
                             t.content());
        }
        text = istream.readLine();
      }
      System.out.println("\n*** Add/Remove Complete ***");
    }
    catch (FileNotFoundException e) {
      System.err.println("File does not exist");
      return; 
    }
    catch (IOException e) {
      System.err.println("Unsuccessful read");
      return; 
    }
	catch (IllegalArgumentException e) {
	  System.err.println("Can't add/remove negative amounts");
      return; 
	}
	catch (Tank.TankOverFlowException e) {
	  System.err.println("Tank overflow by "+e.overflow);
      return; 
	}
	catch (Tank.TankUnderFlowException e) {
	  System.err.println("Tank underflow by "+e.underflow);
      return; 
	}
  }
}