Thread: help me with files

Originally Posted by xclarkiex5x

infile is a file stream so is outfile... i think

Right, so what I said is that "infile >> something" also returns a value that tells you if it was sucessfull or not. So how would you use that with your work?

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Mats

Originally Posted by xclarkiex5x

ok and you were correct with your sum of the numbers instead of my count of the numbers
which means ill probably have to change the program

You'll have to change it a tiny bit - most of it is the same whether you count something or sum something up, right? You still read numbers from a file and output to a file.

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Mats

Obviously, you will need some variable to hold your sum - and calling it sum would be a good idea, because that gives people some idea of what it's used for. On the other hand, you no longer need a count variable [although it could be useful to CHECK how many numbers you've added together, to see if you believe that your program does the right thing].

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Mats

That is actually incorrect - infile.eof() will only tell you that you are at the end of file when you have attempted to read PAST the end of file, so you will do one more loop than you exect to do.

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Mats

Originally Posted by xclarkiex5x

what would you suggest instead of infile.eof()?

What I already said:

Code:

infile >> somethign

will give a "return value" based on the success of the read operation. I guess I have to spoon-feed you:

Code:

while(infile >> number) ...

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Mats

So give it your best shot. Have you not written any code before to add things together, that you could use as a "template"?

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Mats