How to use graphcis.h

[louis_mine]

Hi, I am trying to use graphics.h library on a program, I copied the example of a program that comes in help, however, it does compile but at the time I try to run it, it shows a lot of linker Errors, I really don't know what do they mean and why are there appearing, so, if anyone knows something, I would really appreciate help on this, Thanx

The program I am trying to use is the example to draw a line, here it is:

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>

int main(void)
{
   /* request auto detection */
   int gdriver = DETECT, gmode, errorcode;
   int xmax, ymax;

   /* initialize graphics and local variables */
   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */
   errorcode = graphresult();
   /* an error occurred */
   if (errorcode != grOk)
   {
      printf("Graphics error: %s\n", grapherrormsg(errorcode));
      printf("Press any key to halt:");
      getch();
      exit(1);
   }

   setcolor(getmaxcolor());
   xmax = getmaxx();
   ymax = getmaxy();

   /* draw a diagonal line */
   line(0, 0, xmax, ymax);

   /* clean up */
   getch();
   closegraph();
   return 0;
}

The linker errors it shows are:

Linking NONAME00.EXE:
Linker Error: Undefined symbol _closegraph in module NONAME00.CPP
Linker Error: Undefined symbol _line in module NONAME00.CPP
Linker Error: Undefined symbol _getmaxy in module NONAME00.CPP
Linker Error: Undefined symbol _getmaxx in module NONAME00.CPP
Linker Error: Undefined symbol _setcolor in module NONAME00.CPP
Linker Error: Undefined symbol _getmaxcolor in module NONAME00.CPP
Linker Error: Undefined symbol _grapherrormsg in module NONAME00.CPP
Linker Error: Undefined symbol _graphresult in module NONAME00.CPP
Linker Error: Undefined symbol _initgraph in module NONAME00.CPP


Thanx again

[Kennedy]

You'll have to link to the graphics lib. . . I think you are using an old compiler though. . . which one are you using?

[louis_mine]

Yep, I am using a quite old compiler, but using a newer is not allowed, because it is going to be run on this one.
I am using Turbo C++ Version 3.0

Ok, on options->linker->libraries I activated Graphic libraries, I can run the program now, however it throws at me another error, now while it is running:
Graphics error: Device Driver File not found (EGAVGA.BGI)

Could anyone explait to me what does this Mean? Do I have to download or configure anything extra?
And if th's the case, could someone tell me where or how can I do it?

Thanx again

[manutd]

Yeah, a newer compiler

[louis_mine]

Yeah, a newer compiler

Oh, so fun, specially because I said I couldn't use a newer one.
Anyway, I've already solved this problem, I was missing the BGI library and now it works just fine

Thanks for the help

[manutd]

hehe...whoops What class/application are you taking/programming that requires you to use TC 3.0?

[louis_mine]

I am working on a Compiler, it is supposed to use the least resources it can and it must be done from nothing, so, we are not allowed to use newer versions of TC (I believe is a lot of Teacher's desire to make it harder)

[manutd]

Nice, tough assignment, tough requirements, ugly compiler...I've had one of those teachers

[Kennedy]

I have some code that I have to use TC 3.0 on. . . it is very buggy. Just FYI.