Filling a vector from file... having a hard time...

This is a discussion on Filling a vector from file... having a hard time... within the C++ Programming forums, part of the General Programming Boards category; This is pretty much what was given to us, I cannot get this to work... it just hangs when i ...

  1. #1
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    Filling a vector from file... having a hard time...

    This is pretty much what was given to us, I cannot get this to work... it just hangs when i open the input file.
    Code:
    void FillParallelVectors (string& CustomerName,
    						  int& AccountNumber,
    						  double& BeginningBalance,
    						  int& Count,
    						  int& NumberOfItems,
    						  vector <int>& CheckNumberVector,
    						  vector <double>& AmountVector)
    {
    	ifstream AccountInfoFile;
    	OpenInputFile (AccountInfoFile);
    	Count = 0;
    	NumberOfItems = 0; 
    	AccountInfoFile >> CustomerName >> AccountNumber >> BeginningBalance;
    	AccountInfoFile >> CheckNumberVector [Count] >> AmountVector [Count];
    	while (!AccountInfoFile.eof ())
    	{
    		Count ++;
    		if (Count >= CheckNumberVector.size ())
    		{
    			CheckNumberVector.resize (2 * CheckNumberVector.size ());
    			AmountVector.resize (2 * AmountVector.size ());
    		}
    	    AccountInfoFile >> CheckNumberVector [Count] >> AmountVector [Count];
    		NumberOfItems ++;
    	}
    	AccountInfoFile.close ();
    }

  2. #2
    Registered User jlou's Avatar
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    If it just hangs when you open the input file, perhaps the problem is in the OpenInputFile code that you haven't posted.

  3. #3
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    Code:
    void OpenInputFile (ifstream& File)
    {
      string FileName;
      cout << "Please enter the drive and full path name for the input file: ";
      cout << endl << "No spaces in folder or file names ==> " ;
      cin  >> FileName;
      File.open (FileName.c_str ());   // output file
      if (File.fail ())
       {
          cout << FileName << " could not be opened." << endl;
          exit (-1);
        }
    }
    Last edited by criticalerror; 12-11-2003 at 06:44 PM.

  4. #4
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    I am posting the source that I have written so far... it's far from complete, I am pretty much lost as to why it won't fill the vectors, as I am using the code almost line for line from what my instructor gave us.
    Attached Files Attached Files

  5. #5
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    Utilities
    (required to run this program, place it in the same directory)
    Attached Files Attached Files

  6. #6
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    contents of one of the input files:

    Customer_One 1234 11/26/03 2000.98
    102 50.00
    101 2.97
    104 15.98
    110 306.23
    109 12.50
    107 45

  7. #7
    Registered User jlou's Avatar
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    Quick glance shows that when you read in the data from the file, you read in CustomerName, then AccountNumber, then BeginningBalance. However, in your sample input, the first line has CustomerName, then AccountNumber, then a date, then BeginningBalance.

    I would remove the date from the input file to test your current code, then add code to read in the date. It is harder since it is a number, then character ('/'), then number, etc.

  8. #8
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    aw man... thanks, that would have totally escaped me... I am past the hanging, I'll have to implement the change.

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