create folder and put your files inside the folder using c++

[Vigii]

Hi,

I'm a newbie. I wanted to know how to create a folder using c++. After creating a folder I would access a function which will give me a set of *.txt files which needs to be outputted to the newly created folder.

Examples are most welcomed.

Thanks in Advance.

[keskiverto]

http://www.cplusplus.com/forum/windows/85516/

[Vigii]

This is all about creating a folder. It's Ok.

But I need to put all the *.txt files which are printed into the newly created folder.

The post you have posted is saying about creating a folder. But It doesn't say anything about the location of the printing .txt files will be directed to the specific folder which is created.

So, I think this is not what I need.

[Vigii]

Please have a look at a function shown below.

Here, It does print the files (Example: Time step-1, Time step-2,.........Time step n) . I want to create a folder named ftcs (for example) first and then I need to print the files inside the folder what I created.

              int ftcs (float aa,float bb,float a,float d,float* u,int m,float o)
                 {
                         for (int k=1;k<=aa/bb+1;k++)
                              {
                                   ofstream myfile;
                                   stringstream ss;
                            	   ss << "Time Step-" << k*bb << ".txt";
                            	   myfile.open (ss.str().c_str());
                                   cout<<"\nTime Step:"<<k*bb<<" Sec\n";   
                                   std::copy (u,u+m,un);       
                                   for (int j=1;j<a/d;j++)
                                     {
                                            u[j]=un[j]+o*(un[j+1]-(2*un[j])+un[j-1]);
                              			    myfile<<std::setprecision(16)<<u[j]<<"\t";
                                            myfile<<j*d<<endl;           		  
                                            //cout<<"\n"<<j<<"\t"<<u[j];
                                     }myfile.close(); //cout<<"\n";
                               }     
                 }

I understand clearly that I can create folder by using similar kind of code shown below. But i want a clear idea how would I proceed with creating the files in the specific folder I create.

    #include <direct.h>
    int main()
    {
          mkdir("c:/myfolder");
          return 0;
    }

[keskiverto]

Line 8 of your code passes a string to ofstream::open(). Depending on your ofstream implementation it might be just happy with "c:/myfolder/foo.txt".

[Vigii]

How can I create a folder in an c++ program executable location?

but as per my last post. It creates in "c:/myfolder".

If you have executable in "d:/cpp" and if i need to create a folder in location "d:/cpp" without defining the location.

Is it possible. If so, How?

[Chervil]

There are two different directories to consider. One is the directory where the executable is located. The other is the current working directory (cwd).
Here's a short program which should display both. Depending upon your system, these may or may not be the same.

#include <iostream>
#include <string>
#include <dir.h>

using namespace  std;

std::string getcwd();
std::string getexedir(const char * s);

int main(int argc, char *argv[])
{
    cout << getexedir(argv[0]) << endl;
    cout << getcwd() << endl;

    return 0;
}

std::string getcwd()
{
    char result[1024];
    return std::string(getcwd(result, sizeof(result)));
}

std::string getexedir(const char * s)
{
    string exe(s);
    size_t pos = exe.rfind('\\');
    if (pos != string::npos)
        exe = exe.substr(0,pos);
    return exe;
}

[Vigii]

Hi Chervil,

The program gives the location of either executable or cwd.

But how to add the new folder to cwd or executable.

can you explain me that.

[Vigii]

I fixed my issue with the solution below.

But now I would need to place my files inside the directory which i created.

How would I change the directory where my files are to be printed out.

#include <iostream>
#include <sstream>
#include <string>
#include <direct.h> // for _mkdir
using namespace std;

int main()
{
    int counter = 0;
    while(counter < 10)
    {
        ostringstream oss;
        oss << "ABCDEF " << counter;
        _mkdir(oss.str().c_str());
        counter++;
    }
    return 0; // main returns 0 even if it's not explicit,
              // so you might as well make this clear!
}

[keskiverto]

Filename can contain a path component. Path can be either relative or absolute. The system actually concatenates cwd (an absolute path) with a filename that has either relative or no path in order to create an absolute path.

If a system library provides getcwd, it probably has setcwd as well.

[code]// when getcwd returns "C:/foo"
myfile.open("C:/foo/bar.txt");
myfile.open("bar.txt"); // same as "C:/foo/bar.txt"
myfile.open("gaz/bar.txt"); // same as "C:/foo/gaz/bar.txt"
myfile.open("../Users/bar.txt"); // same as "C:/Users/bar.txt"