how to run C Graphics Program in UBUNTU

                 how to Include gcc <graphics.h>?
ans
  This post is about how you can run graphics program in Ubuntu platform.

Steps:

Step:1
Make sure that you have basic compilers installed. For this run the command:

     sudo apt-get install build-essential

Step:2
Install few packages that required. Run the command:

     sudo apt-get install libsdl-image1.2 libsdl-image1.2-dev guile-1.8 guile-1.8-dev libsdl1.2debian libart-2.0-dev libaudiofile-dev libesd0-dev libdirectfb-dev libdirectfb-extra libfreetype6-dev libxext-dev x11proto-xext-dev libfreetype6 libaa1 libaa1-dev libslang2-dev libasound2 libasound2-dev

Step:3
Now download libgraph.
Copy libgraph-1.0.2.tar.gz to your home folder. Right click on it and select "Extract Here".
Then run following commands one by one.

     cd libgraph-1.0.2

     ./configure

     sudo make

     sudo make install

     sudo cp /usr/local/lib/libgraph.* /usr/lib

Step:4
Now Ubuntu is ready to run graphics program. To do that add #include<graphics.h> in your C program.

>>In Turbo C we use following lines

     int gd=DETECT,gm; 
     initgraph(&gd,&gm,"c:\\tc\\bgi");

>>In Ubuntu instead of "c:\\tc\\bgi" write NULL

     int gd=DETECT,gm; 
     initgraph(&gd,&gm,NULL);

Example
      copy following code


///--------------------------------------------------------------------
#include<graphics.h>
int main()
{
int gd=DETECT,gm;
initgraph(&gd,&gm,NULL);   //<-use NULL
setcolor(BLUE);
line(100,100,200,200);
delay(5000);     //wait for output            
closegraph();    
return(0);
}
//------------------------------------------------------------------------

>save code any location
>open terminal (Ctrl+Alt+t)
>go to program saved DIR  $cd mydir
type following commands:
Run it with following command:

     gcc sample.c -o sample -lgraph

     ./sample

oputput:-