Question

how can i convert a c program and run it as an .exe file 

Answer 1

When you create program/application in C or C++, an exe file is created in the bin directory( actually it depends on the path which you give in the options/directories in the turbo C editor). 
One should keep in mind that an exe file is created only after successful compilation. 
Once the .exe file is created of the C or C++ program, you can place the file anywhere, in any directory or drive, i.e., it is portable. 
Then .exe file will behave as an application.

Answer 2

Download TurboC and Copy and paste the program.
Then ctrl+F9 and then F9.
Check in the folder you installed C program.
You would get .exe