Filestream Data Checking

[bob2509]

Hi All,

Back again. This time my problem lies in checking whether the end user has requested the proper file for data processing. In other words, the program prompts the end user for a file name. If the file name is correct then the program will proceed and cout the entire file; if file name is not correct program re-prompts end user for file name. Here's what I came up with that doesn't work:

while (loop > 1)
{
       cout << endl << endl << " Please enter the name of file: ";
       cin >> fileName;
       inData.open(fileName.c_str());
			
       // Get Data 

       inData >> inventorFile;

       if (inventorFile != " ")
 	cout << endl << inventorFile << endl; 
	loop++;
       else
 	loop = 0;			
}

Any direction would be appreciated

bob2509

[bob2509]

I have modified the loop to the following, which still does not work:

while (loop < 1)
{
     cout << endl << endl << " Please enter the name of file: ";
     cin >> fileName;
     inData.open(fileName.c_str());
			
     // Get Data 

     inData >> inventorFile;

     if (!inData)
    {
	cout << endl << inventorFile << endl; 
	loop++;
     }
     else
	loop = 0;
}

[bob2509]

Sorry, but modified again soon:

while (loop < 1)
{
     cout << endl << endl << " Please enter the name of file: ";
     cin >> fileName;
     inData.open(fileName.c_str());
			
     // Get Data 

     if (!inData)
          loop = 0;              
     else
     {
           inData >> inventorFile;
           cout << endl << inventorFile << endl; 
           loop++;
      }
}

[bob2509]

Nevermind, got it to work --

[skipper]

You may consider throwing in a cin.clear(); statement to clear error flags in the event that open() fails.

while (loop < 1)
{
     cout << endl << endl << " Please enter the name of file: ";
     cin >> fileName;
     inData.open(fileName.c_str());
			
     // Get Data 

     if (!inData)
     {
          cin.clear();  // clear error flags
          loop = 0;
     }              
     else
     {
           inData >> inventorFile;
           cout << endl << inventorFile << endl; 
           loop++;
      }
}

May not be an issue, but, on the other hand, you could find that upon re-prompting and inputting a valid file name, you get prompted again.