dev-cpp-users — Dev-C++ users discussion list

RE: [Dev-C++] *.*

[Jay B. <jay...@ni...>]

[snip]

	Hi, my name is Lorenzo and I'm new in C++ programming. I'm
writing a command line application using DEV-C++ and I want to pass to
command line a sentence of type " myapp *.* " to make it work on all
files in a directory. How can I do it? How can I pass a directory name
to my application and make it work on current directory and all
subdirectory? =20
	[/snip]
	=20
	=20
	How about the readdir() function?=20
	=20
	P.S. Google is your friend.=20

Re: [Dev-C++] *.*

[<ca...@fb...>]

hallo dev-cpp-users,

lp> Hi, my name is Lorenzo and I'm new in C++ programming. I'm writing a command line application using DEV-C++ and I want to pass to command line a sentence of type " myapp *.* " to make it work on
lp> all files in a directory. How can I do it? How can I pass a directory name to my application and make it work on current directory and all subdirectory? 

isn't wildcarding a shell business?
as I recall, the wildcard is parsed by the shell which then sends a
list of all files to your app... when I recall correctly..


 best regards
 Christian


 ---

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 caefer   /\\    Message void if penguin violated  V
 c.2003  _\_V    Don't mess with the penguin       O

 ---------------------------------------------------

 Christian
                                                    
 Isarstrasse 4    +   Tel. :    +49 (0)421 16 535 16
 28199 Bremen     +   eMail: mailto:ca...@fb...

 ---------------------------------------------------

 - graphics - webdevelopment - general programming -

[Dev-C++] *.*

[<lor...@ya...>]

Hi, my name is Lorenzo and I'm new in C++ programming. I'm writing a command line application using DEV-C++ and I want to pass to command line a sentence of type " myapp *.* " to make it work on all files in a directory. How can I do it? How can I pass a directory name to my application and make it work on current directory and all subdirectory? 
Thanks in advance, 
Lorenzo. 
 



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Re: [Dev-C++] Re: Dev-cpp-users digest, Vol 1 #1887 - 11 msgs

[Emiliano <sky...@fa...>]

----- Original Message ----- 
From: "Jens Tusche" <Tu...@gm...>
To: <dev...@li...>
Sent: Monday, February 16, 2004 8:59 AM
Subject: [Dev-C++] Re: Dev-cpp-users digest, Vol 1 #1887 - 11 msgs


> < Subject: [Dev-C++] Debugger not working? 4.9.8.7
> <
> <As in the subject, it won't work at all on my winxp system. The project
> gets
> <compiled, the debugging window is there, but no "step" button does what
it
> <should, the step-by step execution doesn't start. In the output of gdb
I've
> <noticed this:
> <
> <frames-invalid
> <
> <What is the last version with debugger know to work?
>
> This sounds like the problem that I had. It seems that the debugger must
be
> manually coerced to generate the necessary debug information. Somebody
told
> me to put a "-g3" as a parameter to the compiler options. After I'd done
this
> everything has been working fine.

First of all, thank you very much for your answer. I was loosing hope on
this mailing list :)

I've noticed that option was already present in the compiler prompt. I've
also tried to add it as you suggested, but I still get the same problem.

this is the complete gdb output:

(gdb)
prompt
post-prompt
breakpoints-invalid
Breakpoint 2 at 0x40169c: file main.cpp, line 202.
pre-prompt
(gdb)
prompt
post-prompt
Starting: "path/name.exe"

Snooping with FileMonitor, I've noticed that there's an executable starting
somewhere, but then nothing happens (no steps, no window opening, and so
on...). The only effect is that debug window gets ghosted when I click twice
on "Next Step" or "Debug" itself. Everything else simply does nothing.

Also, if I open the cpu window, it goes in "wait timeout for debug command"
error. As if the debugger is not there anymore...

What can I do? :)

regards
Emiliano Esposito

[Dev-C++] Re: Dev-cpp-users digest, Vol 1 #1887 - 11 msgs

[Jens T. <Tu...@gm...>]

< Subject: [Dev-C++] Debugger not working? 4.9.8.7
<
<As in the subject, it won't work at all on my winxp system. The project
gets
<compiled, the debugging window is there, but no "step" button does what it
<should, the step-by step execution doesn't start. In the output of gdb I've
<noticed this:
<
<frames-invalid
<
<What is the last version with debugger know to work?

This sounds like the problem that I had. It seems that the debugger must be
manually coerced to generate the necessary debug information. Somebody told
me to put a "-g3" as a parameter to the compiler options. After I'd done this
everything has been working fine.

-- 
GMX ProMail (250 MB Mailbox, 50 FreeSMS, Virenschutz, 2,99 EUR/Monat...)
jetzt 3 Monate GRATIS + 3x DER SPIEGEL +++ http://www.gmx.net/derspiegel +++

RE: [Dev-C++] Printer output

[Lloyd A. <ll...@ea...>]

In Console mode how about something like this.

This sends characters to my printer que (in XP), but I can't get it to
the printer.

 

#include <fstream.h>

int main()

{

 char* s1 = "\nToday's winning number is  ";

 int n1 = 17982;

 ofstream outfile;

 outfile.open("PRN");

 outfile << s1 << n1 << endl;

 outfile << '\x0D';

  return 0;

}

 

 

Lloyd

 

 

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Lloyd
Ashmore
Sent: Saturday, February 14, 2004 4:50 PM
To: dev...@li...
Subject: [Dev-C++] Printer output

 

Can someone show me how to get simple output to the printer.

I am also interested in being able to send a file to the printer.

 

Thanks in advance

Lloyd

Re: [Dev-C++] Printer output

[Per W. <pw...@ia...>]

For a system-independant solution you might look at the wxWindows
framework. It contains some nice HTML classes that supports presentation
of HTML pages.

/Per W

On Sun, 15 Feb 2004, Goran Rakic wrote:

> Dana nedelja 15. februar 2004. 20:25, Per Westermark je napisao/la:
> > Rich Text is one text format.
> > HTML is another format.
>
> Ok, tell me for HTML. There is no need for full HTML 4 support, i need only
> tables and text formating.
>
> Thanx,
> Goran
>
>

Re: [Dev-C++] Printer output

[Goran R. <go...@de...>]

Dana nedelja 15. februar 2004. 20:25, Per Westermark je napisao/la:
> Rich Text is one text format.
> HTML is another format.

Ok, tell me for HTML. There is no need for full HTML 4 support, i need only 
tables and text formating.

Thanx,
Goran

Re: [Dev-C++] Printer output

[Per W. <pw...@ia...>]

Rich Text is one text format.
HTML is another format.

Which of the two formats are you thinking about?

/Per W

On Sun, 15 Feb 2004, Goran Rakic wrote:

> Dana nedelja 15. februar 2004. 09:31, Daniel Glenfield je napisao/la:
> > in windows you do the following:
> > 1) Get a handle to a printer device context
> > 2) Call StartDoc()
> > 3) Call StartPage()
> > 4) Call GDI functions such as ellipse() and DrawText()
> > 5) Call EndPage()
> > 6) Call EndDoc()
> >
>
> Is there some simple way how you can print some RichText like HTML document in
> one step with custom pageing (header, footer and so on). Some kind of wrapper
> library?
>
> Thanx,
> Goran
>
>
>
> -------------------------------------------------------
> SF.Net is sponsored by: Speed Start Your Linux Apps Now.
> Build and deploy apps & Web services for Linux with
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>

Re: [Dev-C++] Printer output

[Goran R. <go...@de...>]

Dana nedelja 15. februar 2004. 09:31, Daniel Glenfield je napisao/la:
> in windows you do the following:
> 1) Get a handle to a printer device context
> 2) Call StartDoc()
> 3) Call StartPage()
> 4) Call GDI functions such as ellipse() and DrawText()
> 5) Call EndPage()
> 6) Call EndDoc()
>

Is there some simple way how you can print some RichText like HTML document in 
one step with custom pageing (header, footer and so on). Some kind of wrapper 
library?

Thanx,
Goran

RE: [Dev-C++] Printer output

[Daniel G. <sp...@ho...>]

in windows you do the following:
1) Get a handle to a printer device context
2) Call StartDoc()
3) Call StartPage()
4) Call GDI functions such as ellipse() and DrawText()
5) Call EndPage()
6) Call EndDoc()


>From: "Lloyd Ashmore" <ll...@ea...>
>To: <dev...@li...>
>Subject: [Dev-C++] Printer output
>Date: Sat, 14 Feb 2004 16:50:19 -0800
>
>Can someone show me how to get simple output to the printer.
>
>I am also interested in being able to send a file to the printer.
>
>
>
>Thanks in advance
>
>Lloyd
>

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[Dev-C++] Printer output

[Lloyd A. <ll...@ea...>]

Can someone show me how to get simple output to the printer.

I am also interested in being able to send a file to the printer.

 

Thanks in advance

Lloyd

Re: [Dev-C++] CreateProcess balks during compile operation

[Doug M. <dou...@al...>]

A follow-up on this problem.

I can build successfully if I open a Command Prompt window, cd to the 
project dir, and type "make -f Makefile.win -n" to get the commands make 
would issue to build the app, then issue them manually.  This works 
fine, and I get an app that works.

If I then type, in the Command Prompt window, "Make -f Makfile.win", I 
get the message that nothing needs to be built - again, correctly.

Assuming that "make -f Makefile.win" is the command issued by the 
Dev-C++ "Execute-->Compile" menu item, this seems to imply that the 
problem lies in the glue between Make and its subcommands, e.g., g++.

==> Anybody know what is going on here?  I am working with my second 
install of Dev-C++.  I first was trying to use an executable-only 
version in conjunction with DJGPP.  Could I be dealing with leftover 
cruft from that?

Doug

[Dev-C++] CreateProcess balks during compile operation

[Doug M. <dou...@al...>]

Running Windows XP SP1, Dev-C++ full install 4.9.8.0.  Created a new 
console application project and inserted a "hello, world" print 
statement into the source.  I'm getting some kind of subcommand 
dispatching error when I try to build:

----
process_begin C:\Proj\playpen\process_begin
CreateProcess(C:\DJGPP\bin\sh.exe, C:/DJGPP/bin/sh.exe -c "g++.exe -c 
main.cpp -o main.o -I\"C:/Dev-Cpp/include/c++\" 
-I\"C:/Dev-Cpp/include/c++/mingw32\" 
-I\"C:/Dev-Cpp/include/c++/backward\"  -I\"C:/Dev-Cpp/include\"  ", ...) 
failed.
-----
make (e=87) C:\Proj\playpen\make (e=87)
The parameter is incorrect.
-----
  C:\Proj\playpen\Makefile.win
[Build Error]  [main.o] Error 87
-----

I replicated this by going into the source dir with a command prompt and 
typing "make -f Makefile.win".  Behaves in just the same way.

It looks to me as though the g++ command isn't getting off the ground. 
Now, it's odd to me that my Dev-C++ directory try contains no sh.exe at 
all - you'll note that it's trying to run one from a DJGPP directory 
that occurs later in the PATH chain.  Which, by the way, is:

Path=C:\Dev-Cpp\bin;C:\DJGPP\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program 
Files\Common Files\Adaptec Shared\System

Any clues?  Do I need to update or reinstall to get that sh.exe?

Thanks in advance
Doug

[Dev-C++] =?Windows-1251?B?zeX08uXv8O7i7uQ=?=

[Maggie <el...@se...>]

     <img src="cid:D502EB09.4E2BDDCA.E5892339.D13C930B_csseditor">

[Dev-C++] Debugger not working? 4.9.8.7

[Emiliano <sky...@fa...>]

As in the subject, it won't work at all on my winxp system. The project gets
compiled, the debugging window is there, but no "step" button does what it
should, the step-by step execution doesn't start. In the output of gdb I've
noticed this:

frames-invalid

What is the last version with debugger know to work?

Re: [Dev-C++] line skip

[Paul I. <pi...@ot...>]

Quoting Noorez Kassam <coo...@ho...>:

> The marked program line in the loop is skipping on the first time aroun=
d. It
>=20
> is the cin.getline() function.
>=20

Where?=20


btw, noticed the line:

while(ask !=3D 'y' || ask !=3D 'Y' || ask !=3D 'n' || ask !=3D 'N')

this will always be true. (If ask =3D=3D 'y' then ask !=3D 'Y' ...)


> #include <iostream>
> #include <cstdlib>
> #include <direct.h>
> using namespace std;
>=20
> int system(bool cls);
> int main()
> {
>   cout << "Easy to use dos-prompt!" << endl;
>   cout << "\nTo switch dirves use this: drvswitch\n";
>   cout << "\nTo quit you can use any one of the following commands: \n"
>        << "quit, bye, exit\n";
>=20
>   char ask;
>=20
>   do
>   {
>     cout << "\nWould you like to enter the system? [Y\\N]";
>     cin >> ask;
>=20
>     if(ask =3D=3D 'y' || ask =3D=3D 'Y')
>     {//main if
>=20
>      cout << "\nYou can also have the program Clear Screen automaticly =
after
>=20
> each command.\n";
>      cout << "Is this Ok [Y\\N] ";
>=20
>      char cls;
>      bool cLs;
>      cin >> cls;
>      if(cls =3D=3D 'y' || cls =3D=3D 'Y')
>      {
>        cLs =3D TRUE;
>      }
>=20
>      else if(cls =3D=3D 'n' || cls =3D=3D 'N')
>      {
>        cLs =3D FALSE;
>      }
>=20
>      else
>      {
>        cout << "What...";
>        cout << "Default is set. No Clear Screen!\n";
>        cLs =3D FALSE;
>      }
>      //return to main test
>      system(cLs);
>      system("pause");
>      return 0;
>     }
>=20
>     else if(ask =3D=3D 'n' || ask =3D=3D 'N')
>     {
>       cout << "Bye!" << endl;
>       system("pause");
>       return 0;
>     }
>=20
>     else
>     {
>       cout << "What....\n" << endl;
>     }
>=20
>   }while(ask !=3D 'y' || ask !=3D 'Y' || ask !=3D 'n' || ask !=3D 'N');
>=20
>   return 0;
> }
>=20
> //define the system function
> int system(bool cls)
> {
>=20
>   drvswitch:
>=20
>   char drv[8];
>   cout << "\nEnter the name of the drive you want to go to: ";
>   cin >> drv;
>   strcat(drv,":");
>   chdir(drv);
>=20
>   cout << "Now in drive " << drv << "\\" << endl;
>   cout << "You may type in commands" << endl;
>   system("pause");
>   strcat(drv,"\\>");
>=20
>   char coms[123];
>=20
>   while(1)
>   {
>     cout << drv;
>     cin.getline(coms,124); //this is skipping
>=20
>     if( strcmp(coms,"exit")=3D=3D0 || strcmp(coms,"bye")=3D=3D0 ||=20
> strcmp(coms,"quit")=3D=3D0 )
>     {
>       return 0;
>     }
>=20
>     if(strcmp(coms,"drvswitch")=3D=3D0)
>     {
>        goto drvswitch;
>     }
>=20
>     system(coms);
>=20
>     if(cls =3D=3D TRUE)
>     {
>       system("pause");
>       system("cls");
>     }
>=20
>     cout << endl;
>   }//while
> }
>=20
> _________________________________________________________________
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>=20
>=20
>=20
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>=20
>=20

[Dev-C++] line skip

[Noorez K. <coo...@ho...>]

The marked program line in the loop is skipping on the first time around. It 
is the cin.getline() function.

#include <iostream>
#include <cstdlib>
#include <direct.h>
using namespace std;

int system(bool cls);
int main()
{
  cout << "Easy to use dos-prompt!" << endl;
  cout << "\nTo switch dirves use this: drvswitch\n";
  cout << "\nTo quit you can use any one of the following commands: \n"
       << "quit, bye, exit\n";

  char ask;

  do
  {
    cout << "\nWould you like to enter the system? [Y\\N]";
    cin >> ask;

    if(ask == 'y' || ask == 'Y')
    {//main if

     cout << "\nYou can also have the program Clear Screen automaticly after 
each command.\n";
     cout << "Is this Ok [Y\\N] ";

     char cls;
     bool cLs;
     cin >> cls;
     if(cls == 'y' || cls == 'Y')
     {
       cLs = TRUE;
     }

     else if(cls == 'n' || cls == 'N')
     {
       cLs = FALSE;
     }

     else
     {
       cout << "What...";
       cout << "Default is set. No Clear Screen!\n";
       cLs = FALSE;
     }
     //return to main test
     system(cLs);
     system("pause");
     return 0;
    }

    else if(ask == 'n' || ask == 'N')
    {
      cout << "Bye!" << endl;
      system("pause");
      return 0;
    }

    else
    {
      cout << "What....\n" << endl;
    }

  }while(ask != 'y' || ask != 'Y' || ask != 'n' || ask != 'N');

  return 0;
}

//define the system function
int system(bool cls)
{

  drvswitch:

  char drv[8];
  cout << "\nEnter the name of the drive you want to go to: ";
  cin >> drv;
  strcat(drv,":");
  chdir(drv);

  cout << "Now in drive " << drv << "\\" << endl;
  cout << "You may type in commands" << endl;
  system("pause");
  strcat(drv,"\\>");

  char coms[123];

  while(1)
  {
    cout << drv;
    cin.getline(coms,124); //this is skipping

    if( strcmp(coms,"exit")==0 || strcmp(coms,"bye")==0 || 
strcmp(coms,"quit")==0 )
    {
      return 0;
    }

    if(strcmp(coms,"drvswitch")==0)
    {
       goto drvswitch;
    }

    system(coms);

    if(cls == TRUE)
    {
      system("pause");
      system("cls");
    }

    cout << endl;
  }//while
}

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[Dev-C++] skip in program

[Noorez K. <coo...@ho...>]

The cin.getline() function in my loop skips the first time around. I marked 
it with a comment

#include <iostream>
#include <cstdlib>
#include <direct.h>
using namespace std;

int system(bool cls);
int main()
{
  cout << "Easy to use dos-prompt!" << endl;
  cout << "\nTo switch dirves use this: drvswitch\n" << endl;
  cout << "\nTo quit you can use any one of the following commands: \n"
       << "quit, bye, exit\n";

  char ask;

  do
  {
    cout << "\nWould you like to enter the system? [Y\\N]";
    cin >> ask;

    if(ask == 'y' || ask == 'Y')
    {//main if

     cout << "\nYou can also have the program Clear Screen automaticly after 
each command.\n";
     cout << "Is this Ok [Y\\N] ";

     char cls;
     bool cLs;
     cin >> cls;
     if(cls == 'y' || cls == 'Y')
     {
       cLs = TRUE;
     }

     else if(cls == 'n' || cls == 'N')
     {
       cLs = FALSE;
     }

     else
     {
       cout << "What...";
       cout << "Default is set. No Clear Screen!\n";
       cLs = FALSE;
     }
     //return to main test
     system(cLs);
     system("pause");
     return 0;
    }

    else if(ask == 'n' || ask == 'N')
    {
      cout << "Bye!" << endl;
      system("pause");
      return 0;
    }

    else
    {
      cout << "What....\n" << endl;
    }

  }while(ask != 'y' || ask != 'Y' || ask != 'n' || ask != 'N');

  return 0;
}

//define the system function
int system(bool cls)
{

  drvswitch:

  char drv[8];
  cout << "\nEnter the name of the drive you want to go to: ";
  cin >> drv;
  strcat(drv,":");
  chdir(drv);

  cout << "Now in drive " << drv << "\\" << endl;
  cout << "You may type in commands" << endl;
  system("pause");
  strcat(drv,"\\>");

  char coms[123];

  while(1)
  {
    cout << drv;
    cin.getline(coms,124); //this is skipped the first time around

    if( strcmp(coms,"exit")==0 || strcmp(coms,"bye")==0 || 
strcmp(coms,"quit")==0 )
    {
      return 0;
    }

    if(strcmp(coms,"drvswitch")==0)
    {
       goto drvswitch;
    }

    system(coms);

    if(cls == TRUE)
    {
      system("pause");
      system("cls");
    }

    cout << endl;
  }//while
}

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Re: [Dev-C++] chdir() function

[Per W. <pw...@ia...>]

How about specifying the new path as an argument?

chdir("..");
chdir("c:\\usr\\src\\myproject\\");

etc

Note than in Windos this function is often called _chdir() just because M$
likes to be incompatible.

/Per W

On Fri, 13 Feb 2004, Noorez Kassam wrote:

> How do you use the chdir() function?
>
> _________________________________________________________________
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>
>
>
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[Dev-C++] chdir() function

[Noorez K. <coo...@ho...>]

How do you use the chdir() function?

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Re: [Dev-C++] random line from file

[Per W. <pw...@ia...>]

My second algorithm have the problem that it varies the probability of
selecting a line with the length of the line. However, it has the
advantage that it can process any size of file in constant time with
constant memory consumption. Sometimes this is an important trade-off.

/Per W

On Fri, 13 Feb 2004 wa...@wa... wrote:

> On 13 Feb 2004 at 18:10, Per Westermark wrote:
>
> > Oooh. Lots of code, and memory intensive if the file is really big.
>
> Well, everything's a tradeoff. If you get intensive with the memory,
> you get the benefit of the code being a little faster.  With the
> algorithm I wrote up, you only have to read the file once and then
> you can access the line you want immediately.  With your first
> algorithm, you've got to read the same information over and over.
>
> And I don't think my version would be bigger code-wise.
>
> Your second algorithm is making the assumption that the random number
> is generated by the program and can refer to a random place in the
> file as opposed to a random line in the file.  I was making the
> assumption that the random number would be supplied by the user.
> After re-reading the OP's question, I think you're right.
>
> > No need to fight with Windows API unless speed is
> > absolutely imperative, i.e. normal c/c++ file operations are
> > quire ok to use.
>
> I didn't know that Windows had separate file operations per se.  I
> was assuming he'd use the regular file streams.
>
> But I'm not sure if the point of the assignment is to teach them how
> to read text files or use Windows.  If you'll notice, the OP said
> specifically that the program was to use the Windows API and that
> refreshes should be done by hitting a button.  That looks like the
> point is more how to write Windows code than to read text files.
>
> Watson (the pencil neck) Davis
>
>
>
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Re: [Dev-C++] Prompt

[Per W. <pw...@ia...>]

chdir() is quite good at changing directories.

When you fork another program - as you do with system("xx") - and have
it change directory, that doesn't change the directory for your program.

/Per W

On Fri, 13 Feb 2004, Noorez Kassam wrote:

> Just for the fun of it i made this prompt thing but it doesn't switch
> directories? Can you see how i can get it to do it?
>
>
>
> #include <iostream>
> #include <cstdlib>
> using namespace std;
>
> int system();
> int main()
> {
>   cout << "Easy to use dos-prompt!" << endl;
>   cout << "To switch dirves use this: drvswitch\n" << endl;
>   char ask;
>
>   do
>   {
>     cout << "Would you like to enter the system? [Y\\N]";
>     cin >> ask;
>
>     if(ask == 'y' || ask == 'Y')
>     {
>       system();
>       system("pause");
>       return 0;
>     }
>
>     else if(ask == 'n' || ask == 'N')
>     {
>       cout << "Bye!" << endl;
>       system("pause");
>       return 0;
>     }
>
>     else
>     {
>       cout << "What....\n" << endl;
>     }
>
>   }while(ask != 'y' || ask != 'Y' || ask != 'n' || ask != 'N');
>
>   return 0;
> }
>
> //define the system function
> int system()
> {
>   drvswitch:
>
>   cout << "What drive would you like to go to?";
>   char drv[8];
>
>   cin >> drv;
>   strcat(drv,":");
>
>   system(drv);
>
>   cout << "Now in drive " << drv << endl;
>   cout << "Type in commands: " << endl;
>   strcat(drv,"\\>");
>
>   char coms[123];
>
>   while(1)
>   {
>     cout << drv;
>     cin.getline(coms,124);
>
>     if(strcmp(coms,"exit")==0)
>     {
>       return 0;
>     }
>
>     if(strcmp(coms,"drvswitch")==0)
>     {
>        goto drvswitch;
>     }
>
>     system(coms);
>     cout << endl;
>   }//while
> }
>
> _________________________________________________________________
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>
>
>
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> Build and deploy apps & Web services for Linux with
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> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>

[Dev-C++] Prompt

[Noorez K. <coo...@ho...>]

Just for the fun of it i made this prompt thing but it doesn't switch 
directories? Can you see how i can get it to do it?



#include <iostream>
#include <cstdlib>
using namespace std;

int system();
int main()
{
  cout << "Easy to use dos-prompt!" << endl;
  cout << "To switch dirves use this: drvswitch\n" << endl;
  char ask;

  do
  {
    cout << "Would you like to enter the system? [Y\\N]";
    cin >> ask;

    if(ask == 'y' || ask == 'Y')
    {
      system();
      system("pause");
      return 0;
    }

    else if(ask == 'n' || ask == 'N')
    {
      cout << "Bye!" << endl;
      system("pause");
      return 0;
    }

    else
    {
      cout << "What....\n" << endl;
    }

  }while(ask != 'y' || ask != 'Y' || ask != 'n' || ask != 'N');

  return 0;
}

//define the system function
int system()
{
  drvswitch:

  cout << "What drive would you like to go to?";
  char drv[8];

  cin >> drv;
  strcat(drv,":");

  system(drv);

  cout << "Now in drive " << drv << endl;
  cout << "Type in commands: " << endl;
  strcat(drv,"\\>");

  char coms[123];

  while(1)
  {
    cout << drv;
    cin.getline(coms,124);

    if(strcmp(coms,"exit")==0)
    {
      return 0;
    }

    if(strcmp(coms,"drvswitch")==0)
    {
       goto drvswitch;
    }

    system(coms);
    cout << endl;
  }//while
}

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Re: [Dev-C++] random line from file

[<wa...@wa...>]

On 13 Feb 2004 at 18:10, Per Westermark wrote:

> Oooh. Lots of code, and memory intensive if the file is really big.

Well, everything's a tradeoff. If you get intensive with the memory, 
you get the benefit of the code being a little faster.  With the 
algorithm I wrote up, you only have to read the file once and then 
you can access the line you want immediately.  With your first 
algorithm, you've got to read the same information over and over.

And I don't think my version would be bigger code-wise. 

Your second algorithm is making the assumption that the random number 
is generated by the program and can refer to a random place in the 
file as opposed to a random line in the file.  I was making the 
assumption that the random number would be supplied by the user.  
After re-reading the OP's question, I think you're right.  

> No need to fight with Windows API unless speed is 
> absolutely imperative, i.e. normal c/c++ file operations are 
> quire ok to use.

I didn't know that Windows had separate file operations per se.  I 
was assuming he'd use the regular file streams.

But I'm not sure if the point of the assignment is to teach them how 
to read text files or use Windows.  If you'll notice, the OP said 
specifically that the program was to use the Windows API and that 
refreshes should be done by hitting a button.  That looks like the 
point is more how to write Windows code than to read text files.

Watson (the pencil neck) Davis