Run through a set of files

[taurus]

Say I have three directories A, B, C
Now in each of those directories I have numerous file that have the following naming standard: file#.txt, where # is a number starting from 0 and going to 20

How could I first go into directory A and run through all the files processing each one 1 at a time, then move to next directory etc and repeat?

[bithub]

Cprogramming.com FAQ > Accessing a directory and all the files within it

[taurus]

what about doing this:

#include <stdio.h>

int main() {
  FILE *file; 

  file = fopen("data/hello#.txt", "r"); 

    fclose(file);
    return 0;
  }
}

And substituiting # with a variable and loop it, is that possible?

[bithub]

>> is that possible?
Yes it is. Just make sure to fclose() every time you call fopen() in the loop.

[vart]

sprintf should help