BGI error, How to Resolve it?

Question

I want to run a C program that draws a circle. The program is compiling with no error and it is running. After getting the values like radius from the user, I get the error

Answer 1

Could be multiple reasons:

• wrong path to the bgi file (I see the colon is missing)
• unsupported graphics mode (don't expect DOS graphics apps to work under Vista and up)