Answer 1

dos.h header file has useful functions like delay(), kbhit() etc. delay() delays the execution of code for specific time. You can use this function to make animations like moving car, bouncing ball n so others. kbhit() function let you to get key press from user. You can use this function to make text fields from which you can take inputs graphically. There is so many functions in this header file you can get help from turbo c Help page or from internet.