Search code examples
c++arraysvariablesofstream

c++ ofstream write_to_log.open (" relative path + array");

I want the line below to write a new file using the content given in the array but into a new folder named logs:

char log_file_name[100]; /* this array contains the name of a new file */

ofstream write_to_log;
write_to_log.open (relative path, log_file_name , fstream::app);

How do I get it working ?

Solution

  • You can use CreateDirectory for creating folders with VC++ in Windows.

    #include <windows.h>
#include <string>
#include <fstream>
using namespace std;

int main() {
   string path = "C:\\users\\folder";
   CreateDirectory(path.c_str(), NULL);

   char log_file_name[100] = "log.txt";
   path += '\\';
   path += log_file_name;
   ofstream write_to_log(path.c_str(), fstream::app);

   return 0;
}

    The NULL refers to a security attributes structure that you may have to create. More details at MSDN here and in this answer.