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Sep 23rd, 2006

create, write & read file to/from folder

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hello.. help me solve this :cheesy:

when a new car or motorcycle created, the system should create a folder with the name of the car or motorcycle. the hierarchy should be like this:

Vehicle(main exe folder)
+Car
-Porsche
-Ferrari
+Motorcycle
-Suzuki
-Honda

new vehicle info's folder shoud be create as example
---> c:\vehicle\motorcycle\suzuki125\
---> c:\vehicle\car\ferrari\ferrariSE\

so, from C++
- how to create new folder?
- how to create new file in new folder?
- how to write/read file from the folder?

Last edited by n3st3d_l00p; Sep 23rd, 2006 at 8:17 am.

n3st3d_l00p

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Sep 23rd, 2006

Re: create, write & read file to/from folder

so, from C++
- how to create new folder?
- how to create new file in new folder?
- how to write/read file from the folder?

To create a folder do this:

C++ Syntax (Toggle Plain Text)
#include <direct.h>
 
int main()
{
  mkdir("c:/myfolder");
}
#include <direct.h>

int main()
{
  mkdir("c:/myfolder");
}

iamthwee

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Sep 23rd, 2006

Re: create, write & read file to/from folder

To create new file in folder do this:-

C++ Syntax (Toggle Plain Text)
#include <direct.h>
#include <fstream>
 
using namespace std;
int main()
{
  mkdir("c:/myfolder");
  ofstream write ("c:/myfolder/myfile.txt");
 
  write << "Sup mo fo";
 
  write.close();
}
#include <direct.h>
#include <fstream>

using namespace std;
int main()
{
  mkdir("c:/myfolder");
  ofstream write ("c:/myfolder/myfile.txt");
  
  write << "Sup mo fo";
  
  write.close();
}

And so on.

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Sep 23rd, 2006

Re: create, write & read file to/from folder

thank you very well..

i have done the same coding.. but use system("mkdir folder") instead of mkdir("folder");

maybe i just forget to include direct.h before this?

urmm..

Last edited by n3st3d_l00p; Sep 23rd, 2006 at 10:00 am.

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Sep 23rd, 2006

Re: create, write & read file to/from folder

how to create from input?

string folder;
getline(cin, folder);

mkdir(folder); ???

cannot compile!

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Re: create, write & read file to/from folder

Click to Expand / Collapse Quote originally posted by n3st3d_l00p ...

how to create from input?

string folder;
getline(cin, folder);

mkdir(folder); ???

cannot compile!

Through Command Line

C++ Syntax (Toggle Plain Text)
#include <iostream>
#include <direct.h>
 
int main(int argc, char** argv) {
if (argc < 2) {
       std::cerr << "Usage: " << argv[0] << " [new dir name]\n";
       return(EXIT_FAILURE);
 }
if (mkdir(argv[1]) == -1) { // Create the directory
       std::cerr << "Error: " << strerror(errno);
       return(EXIT_FAILURE);
 }
#include <iostream>
#include <direct.h>

int main(int argc, char** argv) {
if (argc < 2) {
       std::cerr << "Usage: " << argv[0] << " [new dir name]\n";
       return(EXIT_FAILURE);
 }
if (mkdir(argv[1]) == -1) { // Create the directory
       std::cerr << "Error: " << strerror(errno);
       return(EXIT_FAILURE);
 }

}

Grunt

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Sep 23rd, 2006

Re: create, write & read file to/from folder

Since mkdir() is not a standard C/C++ function, it's not surprising it doesn't work. The standard language is designed to be ignorant of the 'outside world' (directories, screen, keyboard) so anything that uses them outside the rudimentary I/O is compiler dependant. You'll have to look through your compiler documentation to see what functions it provides.

WaltP

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Sep 23rd, 2006

Re: create, write & read file to/from folder

@n3st3d_l00p
If you want a portable solution then you can use Boost Filesystem library. There's a create_directory function for creating directories.

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Sep 23rd, 2006

Re: create, write & read file to/from folder

Click to Expand / Collapse Quote originally posted by Grunt ...

Through Command Line
C++ Syntax (Toggle Plain Text)
#include <iostream>
#include <direct.h>
 
int main(int argc, char** argv) {
if (argc < 2) {
       std::cerr << "Usage: " << argv[0] << " [new dir name]\n";
       return(EXIT_FAILURE);
 }
if (mkdir(argv[1]) == -1) { // Create the directory
       std::cerr << "Error: " << strerror(errno);
       return(EXIT_FAILURE);
 }
#include <iostream> #include <direct.h> int main(int argc, char** argv) { if (argc < 2) { std::cerr << "Usage: " << argv[0] << " [new dir name]\n"; return(EXIT_FAILURE); } if (mkdir(argv[1]) == -1) { // Create the directory std::cerr << "Error: " << strerror(errno); return(EXIT_FAILURE); }
}

how should i use these? run at cmd line? :rolleyes:

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Sep 23rd, 2006

Re: create, write & read file to/from folder

How about working with const char arrays instead?

C++ Syntax (Toggle Plain Text)
#include <direct.h>
#include <fstream>
#include <iostream>
#include <cstring>
 
using namespace std;
int main()
{
  char folder[101];
  cout << "Name your folder mo fo:";
  cin >> folder;
 
  char path[]="c:/";
 
  strcat(path,folder);
 
  mkdir(path);
 
  cout<<"Folder added to c: drive";
  cin.get();
 
}
#include <direct.h>
#include <fstream>
#include <iostream>
#include <cstring>

using namespace std;
int main()
{
  char folder[101];
  cout << "Name your folder mo fo:";
  cin >> folder;
  
  char path[]="c:/";
  
  strcat(path,folder);
 
  mkdir(path);
  
  cout<<"Folder added to c: drive";
  cin.get();
  
}

or look into using c_str() with std::strings?

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