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Make sure that you have basic compilers installed. For this run the command:
sudo apt-get install build-essential
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
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.
sudo make install
sudo cp /usr/local/lib/libgraph.* /usr/lib
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
>>In Ubuntu instead of "c:\\tc\\bgi" write NULL
int gd=DETECT,gm; initgraph(&gd,&gm,"c:\\tc\\bgi");
Here is a sample program to test it's working or not. sample.c
int gd=DETECT,gm; initgraph(&gd,&gm,NULL);
Run it with following command:
gcc sample.c -o sample -lgraph
If you get following screen then my job is done.