This is the C++ code of DDA line drawing algorithm. I would recommend you to use Dev-Cpp to run project files. If you have problems running graphics programs, I would suggest you to download following rar file It also contains the youtube link to configure graphics.h in Dev-cpp. https://drive.google.com/open?id=0B125hv9nf1fNTURyTkZXcTB6b1U