dev-cpp-users Mailing List for Dev-C++

Also in the  Create() function you create a node and put it the list pointer
you create, then you overwrite that pointer with NULL, which is a memory
leak as you don't deallocate the node you created. Also the function doesn't
return anything.

Jason.

----- Original Message -----
From: "Williams, Timothy W." <TIM...@sa...>
To: "'chromatonus 712'" <chr...@ho...>;
<dev...@li...>
Sent: Friday, November 09, 2001 11:07 PM
Subject: RE: [Dev-C++] linked lists


> In your main(), when you declare your first pointer to a node you need to
> set that equal to NULL or 0.  The problem you were having is when you add
> you were taking whatever address that was in list and just plunking it
right
> in ->next which isn't so bad if it's a good address but the way it was
> written, when you were displaying it, it looped fine, but never got to
NULL
> and instead just trotted off into memory.
> node *list = NULL;
> instead of...
> node *list;
>
> --tim
>
> > -----Original Message-----
> > From: chromatonus 712 [mailto:chr...@ho...]
> > Sent: Friday, November 09, 2001 5:44 PM
> > To: dev...@li...
> > Subject: [Dev-C++] linked lists
> >
> >
> > hi, if you'd like to help, this is a menu of functions doing
> > operations on a
> > linked list, and i have a runtime error after i performed
> > add_front() and
> > displayed the list. The correct list was displayed but the
> > error message
> > came right after. Can you please find out what's wrong? Thank you!
> >
> > and, is there an equivalent expression for the Borland
> > gotoxy() in Dev?
> > thanks
> >
> > #include <iostream.h>
> > #include <conio.h>
> > #include <stdlib.h>
> > #include <math.h>
> >
> >
> > struct node
> > {
> >    int data;
> >    node *next;
> > };
> >
> >
> > //PROTOTYPES
> >
> > int menu();
> > node create();
> > node add_front(node *&list, int info);
> > //node add_back(node *&list);
> > node delete_from(node *&list);
> > void display(node *list);
> > void exit();
> >
> >
> > int menu()
> > {
> >    int choice;
> >
> >    cout<< "LINKED LIST EDITOR MENU OPTIONS" << "\n";
> >
> >    cout<< "1.  Create List" << "\n";
> >    cout<< "2.  Add to Front of List" << "\n";
> >    cout<< "3.  Add to Back of List" << "\n";
> >    cout<< "4.  Display List" << "\n";
> >    cout<< "5.  Delete from List" << "\n";
> >    cout<< "10. Exit" << "\n" << "\n";
> >    cout<< "choice? ";
> >    cin>> choice;
> >    return(choice);
> > }
> >
> > int main()
> > {
> >    node *list;
> >    int choice, info;
> >    choice = menu();
> >    while( choice != 10 )
> >    {
> >       switch( choice )
> >       {
> >          case 1:  create();
> >                   break;
> >          case 2:
> >
> >                   cout<< "input?  ";
> >                   cin>> info;
> >                   add_front(list, info);
> >                   cout<< "choice? ";
> >                   cin>> choice;
> >                   break;
> >
> >          //case 3:  add_back(list);
> >          //         break;
> >          case 4:  display(list);
> >                   cout<< "choice? ";
> >                   cin>> choice;
> >                   break;
> >          case 5:  delete_from(list);
> >                   cout<< "choice? ";
> >                   cin>> choice;
> >                   break;
> >          case 10: exit();
> >                   break;
> >          choice = menu();
> >       }
> >    }
> >
> > }
> >
> >
> > node create()
> > {
> >    node *list = new node;
> >    list = NULL;
> > }
> >
> > node add_front(node *&list, int info)
> > {
> >
> >    node *head = new node;
> >    head -> data = info;
> >    head -> next = list;
> >    list = head;
> >
> >
> > }
> >
> > //node add_back(node *&list)
> > //{
> > //   int info;
> > //   cout<< "input? ";
> > //   cin>> info;
> > //   if (list == NULL)
> > //   {
> > //      node *tail = new node;
> > //      tail -> next = NULL;
> > //      list -> next = tail;
> > //   }
> > //   else
> > //   {
> > //      node *tail = new node;
> > //      tail -> next = NULL;
> > //      tail -> next = tail;
> > //   }
> > //}
> >
> > node delete_from(node *&list)
> > {
> >    int info;
> >    node *hold, *jump;
> >    cout<< "number to delete? ";
> >    cin>> info;
> >    hold = list;
> >    jump = hold -> next;
> >    while(hold != NULL)
> >    {
> >       if(hold -> data == info)
> >       {
> >          hold = jump;
> >          list -> next = jump;
> >          jump = hold -> next;
> >       }
> >       else
> >       {
> >          hold = jump;
> >          jump = hold -> next;
> >       }
> >    }
> > }
> >
> > void display(node *list)
> > {
> >    while(list != NULL)
> >    {
> >       cout<< list -> data << "   ";
> >       list = list -> next;
> >    }
> >    system("PAUSE");
> > }
> >
> > void exit()
> > {
> >    system("PAUSE");
> > }
> >
> >
> > _________________________________________________________________
> > Get your FREE download of MSN Explorer at
> http://explorer.msn.com/intl.asp
>
>
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

In your main(), when you declare your first pointer to a node you need to
set that equal to NULL or 0.  The problem you were having is when you add
you were taking whatever address that was in list and just plunking it right
in ->next which isn't so bad if it's a good address but the way it was
written, when you were displaying it, it looped fine, but never got to NULL
and instead just trotted off into memory.
node *list = NULL;
instead of...
node *list;

--tim

> -----Original Message-----
> From: chromatonus 712 [mailto:chr...@ho...]
> Sent: Friday, November 09, 2001 5:44 PM
> To: dev...@li...
> Subject: [Dev-C++] linked lists
> 
> 
> hi, if you'd like to help, this is a menu of functions doing 
> operations on a 
> linked list, and i have a runtime error after i performed 
> add_front() and 
> displayed the list. The correct list was displayed but the 
> error message 
> came right after. Can you please find out what's wrong? Thank you!
> 
> and, is there an equivalent expression for the Borland 
> gotoxy() in Dev? 
> thanks
> 
> #include <iostream.h>
> #include <conio.h>
> #include <stdlib.h>
> #include <math.h>
> 
> 
> struct node
> {
>    int data;
>    node *next;
> };
> 
> 
> //PROTOTYPES
> 
> int menu();
> node create();
> node add_front(node *&list, int info);
> //node add_back(node *&list);
> node delete_from(node *&list);
> void display(node *list);
> void exit();
> 
> 
> int menu()
> {
>    int choice;
> 
>    cout<< "LINKED LIST EDITOR MENU OPTIONS" << "\n";
> 
>    cout<< "1.  Create List" << "\n";
>    cout<< "2.  Add to Front of List" << "\n";
>    cout<< "3.  Add to Back of List" << "\n";
>    cout<< "4.  Display List" << "\n";
>    cout<< "5.  Delete from List" << "\n";
>    cout<< "10. Exit" << "\n" << "\n";
>    cout<< "choice? ";
>    cin>> choice;
>    return(choice);
> }
> 
> int main()
> {
>    node *list;
>    int choice, info;
>    choice = menu();
>    while( choice != 10 )
>    {
>       switch( choice )
>       {
>          case 1:  create();
>                   break;
>          case 2:
> 
>                   cout<< "input?  ";
>                   cin>> info;
>                   add_front(list, info);
>                   cout<< "choice? ";
>                   cin>> choice;
>                   break;
> 
>          //case 3:  add_back(list);
>          //         break;
>          case 4:  display(list);
>                   cout<< "choice? ";
>                   cin>> choice;
>                   break;
>          case 5:  delete_from(list);
>                   cout<< "choice? ";
>                   cin>> choice;
>                   break;
>          case 10: exit();
>                   break;
>          choice = menu();
>       }
>    }
> 
> }
> 
> 
> node create()
> {
>    node *list = new node;
>    list = NULL;
> }
> 
> node add_front(node *&list, int info)
> {
> 
>    node *head = new node;
>    head -> data = info;
>    head -> next = list;
>    list = head;
> 
> 
> }
> 
> //node add_back(node *&list)
> //{
> //   int info;
> //   cout<< "input? ";
> //   cin>> info;
> //   if (list == NULL)
> //   {
> //      node *tail = new node;
> //      tail -> next = NULL;
> //      list -> next = tail;
> //   }
> //   else
> //   {
> //      node *tail = new node;
> //      tail -> next = NULL;
> //      tail -> next = tail;
> //   }
> //}
> 
> node delete_from(node *&list)
> {
>    int info;
>    node *hold, *jump;
>    cout<< "number to delete? ";
>    cin>> info;
>    hold = list;
>    jump = hold -> next;
>    while(hold != NULL)
>    {
>       if(hold -> data == info)
>       {
>          hold = jump;
>          list -> next = jump;
>          jump = hold -> next;
>       }
>       else
>       {
>          hold = jump;
>          jump = hold -> next;
>       }
>    }
> }
> 
> void display(node *list)
> {
>    while(list != NULL)
>    {
>       cout<< list -> data << "   ";
>       list = list -> next;
>    }
>    system("PAUSE");
> }
> 
> void exit()
> {
>    system("PAUSE");
> }
> 
> 
> _________________________________________________________________
> Get your FREE download of MSN Explorer at 
http://explorer.msn.com/intl.asp


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hi, if you'd like to help, this is a menu of functions doing operations on a 
linked list, and i have a runtime error after i performed add_front() and 
displayed the list. The correct list was displayed but the error message 
came right after. Can you please find out what's wrong? Thank you!

and, is there an equivalent expression for the Borland gotoxy() in Dev? 
thanks

#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
#include <math.h>


struct node
{
   int data;
   node *next;
};


//PROTOTYPES

int menu();
node create();
node add_front(node *&list, int info);
//node add_back(node *&list);
node delete_from(node *&list);
void display(node *list);
void exit();


int menu()
{
   int choice;

   cout<< "LINKED LIST EDITOR MENU OPTIONS" << "\n";

   cout<< "1.  Create List" << "\n";
   cout<< "2.  Add to Front of List" << "\n";
   cout<< "3.  Add to Back of List" << "\n";
   cout<< "4.  Display List" << "\n";
   cout<< "5.  Delete from List" << "\n";
   cout<< "10. Exit" << "\n" << "\n";
   cout<< "choice? ";
   cin>> choice;
   return(choice);
}

int main()
{
   node *list;
   int choice, info;
   choice = menu();
   while( choice != 10 )
   {
      switch( choice )
      {
         case 1:  create();
                  break;
         case 2:

                  cout<< "input?  ";
                  cin>> info;
                  add_front(list, info);
                  cout<< "choice? ";
                  cin>> choice;
                  break;

         //case 3:  add_back(list);
         //         break;
         case 4:  display(list);
                  cout<< "choice? ";
                  cin>> choice;
                  break;
         case 5:  delete_from(list);
                  cout<< "choice? ";
                  cin>> choice;
                  break;
         case 10: exit();
                  break;
         choice = menu();
      }
   }

}


node create()
{
   node *list = new node;
   list = NULL;
}

node add_front(node *&list, int info)
{

   node *head = new node;
   head -> data = info;
   head -> next = list;
   list = head;


}

//node add_back(node *&list)
//{
//   int info;
//   cout<< "input? ";
//   cin>> info;
//   if (list == NULL)
//   {
//      node *tail = new node;
//      tail -> next = NULL;
//      list -> next = tail;
//   }
//   else
//   {
//      node *tail = new node;
//      tail -> next = NULL;
//      tail -> next = tail;
//   }
//}

node delete_from(node *&list)
{
   int info;
   node *hold, *jump;
   cout<< "number to delete? ";
   cin>> info;
   hold = list;
   jump = hold -> next;
   while(hold != NULL)
   {
      if(hold -> data == info)
      {
         hold = jump;
         list -> next = jump;
         jump = hold -> next;
      }
      else
      {
         hold = jump;
         jump = hold -> next;
      }
   }
}

void display(node *list)
{
   while(list != NULL)
   {
      cout<< list -> data << "   ";
      list = list -> next;
   }
   system("PAUSE");
}

void exit()
{
   system("PAUSE");
}


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try the source found here for an opengl screensaver skeleton...  I ha=
vent
gotten it to work right yet
http://www.ite.mh.se/~danli97/opengl/minimal.zip

-----Original Message-----
=46rom: Gregor Peter <pe...@in...>
To: Stein Nyg=E5rd <ste...@ge...>
Cc: DevCpp <dev...@li...>
Date: Wednesday, November 07, 2001 7:27 AM
Subject: Re: [Dev-C++] Screensaver!


Some time ago you asked this but I couldn't see if you got an answer =
already

PlaySound is a little tricky I had the same problem once

include <mmsystem.h>

and tell your compiler/linker to use libwinmm.a from DevC++
Lib-Directory ( ...\DevC++\Lib\libwinmm.a )

The linkeroption    -lwinmm    should do it

Good luck :-)

Gregor
(pe...@in...)

----- snip -----

Stein Nyg=E5rd wrote:

> Please... can someone tell me how to make my opengl-apps work as a
> screensaver. Like, I would like them to be named stuff like somethi=
n.scr
> and so that one could choose them in the windows screensaver settin=
gs. I
> really would aprreciate some help on this.
>
> Oh, and I also have another problem... where is PlaySound(); define=
d?
>
>
>
> Thanks alot, Stein
>




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Dev...@li...
https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

#include <iostream.h>
#include <stdlib.h>
int fib(int z);
int fib_iter(int a, int b, int count);

void main(void)
{
 int n; 
 cout << "Enter n:\n";
 cin >> n;
 cout << "My Way...\n";
 cout << fib_iter(1, 0, n);
 cout << "\n and now your way...\n";
 cout << fib(n);

}


int fib_iter(int a, int b, int count)
{
    if (count == 0)
       return 1;
    else
      return a+fib_iter(a+b, a, count-1);
              
}

int fib(int z)
{
if (z==-1)
return 1;
if (z==-2)
return 0;
else
return (fib(z-1)+fib(z-2));
}


> -----Original Message-----
> From: Mansoor Nathani [mailto:man...@sy...]
> Sent: Friday, November 09, 2001 3:46 PM
> To: Dev users
> Subject: [Dev-C++] Efficiency
> 
> 
> Can any one please show me how to increase the efficiency of this
> recursive program?
> 
> THe program is supposed to output the fibonacci sequence up to a given
> value.
> 
> I need it to output in the middle of the recursive function, but
> a lot of garbage gets acumulated.
> 
> Any help would be appreciated.
> 
> Thanks
> 
> Mansoor
> 
> 
> #include <iostream.h>
> int fib(int z);
> 
> void main(void)
> {
> int c;
> for (int abc=0;abc<10;abc++)
> cout<<fib(abc)<<endl;
> cin>>c;
> }
> 
> int fib(int z)
> {
> if (z==-1)
> return 1;
> if (z==-2)
> return 0;
> else
> return (fib(z-1)+fib(z-2));
> }
> 
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
> 

Can any one please show me how to increase the efficiency of this
recursive program?

THe program is supposed to output the fibonacci sequence up to a given
value.

I need it to output in the middle of the recursive function, but
a lot of garbage gets acumulated.

Any help would be appreciated.

Thanks

Mansoor


#include <iostream.h>
int fib(int z);

void main(void)
{
int c;
for (int abc=0;abc<10;abc++)
cout<<fib(abc)<<endl;
cin>>c;
}

int fib(int z)
{
if (z==-1)
return 1;
if (z==-2)
return 0;
else
return (fib(z-1)+fib(z-2));
}

I've never really used Visual C++, but I've found that most editors function
as I describe, including jEdit, KDevelop, and Emacs among others.  It just
doesn't seem very intuitive for the page to be filled with whitespace when
you've never hit the space bar or tab key.
--tim

>not sure how to do that. But when I got started with Visual C++ I found
that part of the 
>interface (clicking on a line goes to the last available space) to be a
pain lol.


>>From: "Williams, Timothy W." 
>>To: "'dev...@li...'" 
>>Subject: [Dev-C++] Editor question 
>>Date: Thu, 8 Nov 2001 17:35:30 -0500 
>> 
>>I'm new to dev-c++. is there a way to make the editor recognize line
breaks 
>>and white space differently. actually, i'm not sure if that's the right 
>>question, so i'll describe it. right now i can click my mouse anywhere in 
>>the editor pane and the cursor will go there but i'm used to (and would 
>>prefer) to have the cursor go to the last available space. in other words 
>>properly follow the white space/ control characters. it seems like it just

>>inserts false whitespace in the entire editor. thanks, 
>>--tim https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

<html><div style='background-color:'><DIV>
<P>not sure how to do that. But when I got started with Visual C++ I found that part of the&nbsp;interface (clicking on a line goes to the last available space) to be a pain lol.<BR><BR></P></DIV>
<DIV></DIV>
<DIV></DIV>&gt;From: "Williams, Timothy W." <TIM...@SA...>
<DIV></DIV>&gt;To: "'dev...@li...'" <DEV...@LI...>
<DIV></DIV>&gt;Subject: [Dev-C++] Editor question 
<DIV></DIV>&gt;Date: Thu, 8 Nov 2001 17:35:30 -0500 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;I'm new to dev-c++. is there a way to make the editor recognize line breaks 
<DIV></DIV>&gt;and white space differently. actually, i'm not sure if that's the right 
<DIV></DIV>&gt;question, so i'll describe it. right now i can click my mouse anywhere in 
<DIV></DIV>&gt;the editor pane and the cursor will go there but i'm used to (and would 
<DIV></DIV>&gt;prefer) to have the cursor go to the last available space. in other words 
<DIV></DIV>&gt;properly follow the white space/ control characters. it seems like it just 
<DIV></DIV>&gt;inserts false whitespace in the entire editor. thanks, 
<DIV></DIV>&gt;--tim 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;_______________________________________________ 
<DIV></DIV>&gt;Dev-cpp-users mailing list 
<DIV></DIV>&gt;Dev...@li... 
<DIV></DIV>&gt;https://lists.sourceforge.net/lists/listinfo/dev-cpp-users 
<DIV></DIV></div><br clear=all><hr>Get your FREE download of MSN Explorer at <a href='http://go.msn.com/bql/hmtag_itl_EN.asp'>http://explorer.msn.com</a><br></html>

How do I make windows consoles with dev-cpp?

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