"Borlands TurboC" is considered "Antique" software by Borland themselves. You can download "TurboC" from its' developers for Free here:
http://community.borland.com/article...,20841,00.html
Note that this is very old programming, 1989 infact. With this software, one can still write code ofcourse, but the included compilers might have issues with todays modern CPU's. The above software, TurboC, may not even be Year2000 compliant.
You may wish to use something more up to date.
http://www.mingw.org/
http://cygwin.com/
Helpful site on C and C++ programming
http://www.cprogramming.com/