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Sep 8th, 2008

reading a text file

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I am attempting to read a text file.

C++ Syntax (Toggle Plain Text)
		ifstream indata;
	                indata.open(filename);
		if(!indata) 
		{ 
			// file couldn't be opened
		}
		else
		{
			// file opened
		}
 
		// keep reading until end-of-file
		string data;
 
		while (getline(indata, data)) 
		{
			//this is where i want to store values
		}
 
		indata.close();
		ifstream indata;
	                indata.open(filename);
		if(!indata) 
		{ 
			// file couldn't be opened
		}
		else
		{
			// file opened
		}

		// keep reading until end-of-file
		string data;

		while (getline(indata, data)) 
		{
			//this is where i want to store values
		}
	
		indata.close();

I want to read values from a text file. Im making the text file so I can read it however. This is a simple example of what I was thinking:

////text file/////
1 2 3 4
5 6 7 8
9 10 11 12
////text file/////

How do I store these values into a 2 dimensional array?

Last edited by Nemoticchigga; Sep 8th, 2008 at 1:32 pm.

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Nemoticchigga

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Sep 8th, 2008

Re: reading a text file

If there is no need for error checking I would read the values from the file as integers as opposed to strings.

iamthwee

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Sep 8th, 2008

Re: reading a text file

how?

Last edited by Nemoticchigga; Sep 8th, 2008 at 1:43 pm.

Nemoticchigga

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Sep 8th, 2008

Re: reading a text file

Click to Expand / Collapse Quote originally posted by Nemoticchigga ...

how?

Set up your 2-D array of integers, then read values into the array with the >> operator.

C++ Syntax (Toggle Plain Text)
indata >> array[i][j];
indata >> array[i][j];

VernonDozier

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No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

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