command prompt results

[Neoyanderson]

i was wondering if there was a way to take the results of a command prompt and use it in the code to determine the output. what i want to do is portray if a certain command was successful or there was an error trying to execute it? can this be done?

 

[ArkM]

The simplest approach: use int system(const char* cmd) library function.

int rc = system("dir mydir > mytemp.txt");
if (rc == -1)
{
// system() failed.
}
else
{
// rc value == the value that is returned by the command interpreter.
// Suppose it's OK. Now mytemp.txt file contains dir result
  ifstream res("mytemp.txt");
  // Process the contents...
  res.close();
  remove("mytemp.txt"); // clean up...
}

Of course, it's a code sceleton only. You may form system()'s arg dynamically. You may invoke not only system cmds (define full path to exe). But if you want to know success/fail condition you must know started cmd return codes values. Be careful with the current working directory (where cmd output catched).
More controllabe solution: use CreateProcess() Win API function (or at least _exec() VC++ function family). It's the other story, try system before...
Good luck!

 

[rchandr3]

You should be knowing this that the output of the command can be redirected to a file in Windows Cmd.exe... With the file, you can do whatever you want to do with simple File programming provided with any language.

C:\> dir > directory.txt

directory.txt will have all the lists....


Cheers,

Ravi