Open several files , read it and then write

[vikingcarioca]

Hi pals

Im gonna explain what I need to do.
First I would like to open 400 files e.g ISO1.dat,..ISO400.dat, within this files I have datas which means numbers for instance( X,Y,Z are vectors)
ISO1.dat has X1,Y1,Z1 vectors
ISO2.dat has X1,Y2,Z2 vectors
ISO3.dat has X1,Y3,Z3 vectors
I only need to read X and Y
then write in a unique file X1,Y1,Y2,Y3...Y400
How Can I do it

Tks

[quzah]

Pretty much just like you described. So let's see your attempt.


Quzah.

[ssharish2005]

I love it! When people ask us to do there home. And some fantastic comments ahead to come lol.

Yo viking, show us your code man..

~ssharish

[Epy]

you might try some for loops and fopens. haha

[Adak]

I'm thinking your OS will not allow you to open 400 files all at once. Remember that you can write out results from the first 20 files, and then open up the next 20 files, and continue writing to the same output file. You can't use wildcards in filenames you want opened, so you'll need to have them logically organized, with specific names, or in a specific directory of their own, or some combination of these two things.

If for some reason, you need to re-open an output file to write more data to it, you can use the append mode to keep all the current data in the file, and just add the new data, right onto the end of the output file.

You'll save yourself a lot of time and trouble, if you take awhile, and write down exactly how you intend to do this, step by step. As if you were going to do it by hand. Make sure that you have a clear vision of what you want the program to do, step by step.

That makes it so much easier to code it up, ask smart questions on the forum, and finish up with a good program.

[abachler]

I would suggest you use either the CRT or the Windows API and probably, with 400 files all named similar, sprintf() will come in handy. I have exactly 2 code readers and zero mind readers, so post what you have tried so far.