How to open, write data to and close a new file for each step of a loop.

Hi everyone,

I'm having a problem with a program I'm writing. I'm doing a numerical simulation, and as part of the simulation, I need to output a data file for every timestep, or later output the data of ten timesteps to a data file etc.

The problem is that I would like to be able to vary the filename in each iteration of the loop in a counter fashon.

For example data 1.dat
data 2.dat
and so on.

I was wondering if anyone knows a way that this can be accomplished.

All help you can give is very welcome and will be greatly appreciated.

Thanks,

Wayne.

You can generate filenames using

Code:

---

char fname[20];
sprintf(fname, "file%03d.dat", num);

---

The other bits are pretty basic file handling, so you either already know that, or you need to read up on file IO basics.

--
Mats

Thanks you for your fast reply.

The other bits are fine, this will literally be the last touch the code.

Thanks again, very much appreciated.

Wayne.