c graphics on ubuntu

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

sudo apt-get install build-essential

#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

#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

#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);

#5 : Run it with following command:

gcc sample.c -o sample -lgraph

./sample

sample.c

#include <stdio.h>

#include <graphics.h>

int main() {

        int gd = DETECT, gm;

        initgraph(&gd, &gm, NULL);

        line(0,getmaxy()/2,getmaxx(),getmaxy()/2);

        line(getmaxx()/2,0,getmaxx()/2,getmaxy());

        setcolor(BLUE);

        circle(getmaxx()/2,getmaxy()/2,150);

        setcolor(GREEN);

        circle(getmaxx()/2,getmaxy()/2,75);

        setcolor(RED);

        circle(getmaxx()/2,getmaxy()/2,25);

        delay(5000);

        getch();

        closegraph();

   return 0;

}

sources: computer solutions