Thread: Writting multiple files into a folder and reading all the files in a folder

I only know fstream and fprintf, both of which need a prenamed file or directory.

What I want to do is write multiple files, i.e. 001.txt, 002.txt.

i would assume that this involves something like:

Code:

for(int o = 0; o < 100; o++)
{
     cout << o << ".txt";
}

Also something that would read everything from a dynamic folder

i.e.

Code:

char directory[100];
strcpy(directory, "12345")

and that would open/write a directory (C:\\1\2\3\4\5)

Hope that made sense :S
Would appreciate someone pointing me to the right direction Thanks!

You just need to build the filename with sprintf (or whatever).

Code:

#include <iostream>
#include <fstream>
#include <cstdio>   // for sprintf

int main() {
    char filename[100];
    int n = 1;
    std::sprintf(filename, "%03d.txt", n);
    std::ofstream ofs(filename);
    ofs << "yo\n";
    return 0;
}

To read a directory's contents you could try opendir, readdir, closedir.

Please avoid C-arrays, C-strings and strcpy, and its friends.
For arrays, I recommend std::array (requires TR1; otherwise boost has it). For C-strings, use std::string. It also replaces strcpy and its friends.

Originally Posted by Elysia

Please avoid C-arrays, C-strings and strcpy, and its friends.
For arrays, I recommend std::array (requires TR1; otherwise boost has it). For C-strings, use std::string. It also replaces strcpy and its friends.

Yeah I have been reading some more modern books on c++ and I will slowly transition into that.

As my programming professor said "I am an old programmer in a new programmers body".