Comments on: Graphics.h in Linux for C and C++

By: vj1207

vj1207 — Fri, 18 May 2012 10:21:33 +0000

please help how to execute kbhit() ??

By: srichakradhar

srichakradhar — Mon, 30 Apr 2012 15:16:20 +0000

# gcc rectangle.c
/tmp/ccRtglXb.o: In function `main’:
rectangle.c:(.text+0x2a): undefined reference to `initgraph’
rectangle.c:(.text+0×39): undefined reference to `moveto’
rectangle.c:(.text+0×52): undefined reference to `rectangle’
rectangle.c:(.text+0x5c): undefined reference to `kbhit’
rectangle.c:(.text+0×65): undefined reference to `closegraph’
collect2: ld returned 1 exit status

I’ve followed every instruction. What is the problem?
‘make install’ gave me the same thing as “Juggernaut” post!

By: abodnya

abodnya — Thu, 19 Apr 2012 13:12:50 +0000

Hey, people! If u want to use simple graphic for studing, better use svgalib and vgaga. They’re better than this “pornography” with graphics.h and SDL.

http://linux.die.net/man/7/svgalib
http://linux.die.net/man/7/vgagl

ALSO (THAT’S INTERESTING)
If you’re also studing Pascal and u are using Free Pascal, when u can use simple graphic in pascal, u use svgalib. I mean, graphics in Free Pascal (FPC) also consist of svgalib and vgagl. That means, you should better use SVGAlib and VGAGL than this graphics.h

By: Siddarth

Siddarth — Sat, 14 Apr 2012 18:00:36 +0000

I am using UBUNTU 10.10

The libgraph got installed successfully, the program also compiles successfully but when try to execute the program, the graphical window just flickers and goes away, not giving me the time to analyze the output, where i am going wrong please help.:(

By: saurabh

saurabh — Thu, 29 Mar 2012 04:15:01 +0000

make
make: *** No targets specified and no makefile found. Stop.

By: Bharanidharan

Bharanidharan — Wed, 14 Mar 2012 13:02:46 +0000

The thing is the following error is occuring,
In file included from /usr/local/include/graphics.h:31:0,
from test1.c:2,
from main.c:3:
/usr/include/unistd.h:441:21: error: conflicting types for ‘sleep’
test0.c:9:3: note: previous implicit declaration of ‘sleep’ was here

By: Bharanidharan

Bharanidharan — Wed, 14 Mar 2012 12:59:05 +0000

Thank You working well
And I’d the solution to execute kbhit() too,
Thanks a lot:)

By: pratik

pratik — Sat, 03 Mar 2012 05:39:48 +0000

I installed all the packages successfully. I’m using ubuntu 11.04
But when I ran and compiled a sample program, it gave the following message:

Unable to init SDL: Unable to open a console terminal

Please advise!

This is my code:
#include
#include
int main()
{
int gd= DETECT,gm;
initgraph(&gd,&gm,NULL);
line(50,50,200,200);
getch();
closegraph();
return 0;
}

By: rohan

rohan — Wed, 22 Feb 2012 06:09:18 +0000

well sir its not working properly from the first command..

By: hit9

hit9 — Thu, 16 Feb 2012 20:34:44 +0000

1.stdio stdlib needn’t