This depends on which compiler you are using.
If you use Visual Studio (presumably on a 32bit Windows), then you can install a 64bit cross-compiler (and the necessary auxiliary tools and libraries), as it says [here](https://msdn.microsoft.com/en-us/library/ms246588(v=vs.90).aspx). Of course, if you use a version of Visual Studio that is older than … Read More
Aaaaannnddd there's your problem. Everyone give a warm round of applause and +1's to Mike for an excellent response.
However, once again, we ...
I don't even know how to put this gently to the OP:
Don't frakking use Turbo C.
OK, let's qualify that statement with: Don't use Turbo … Read More
The executables created by Turbo C are totally incompatible with 64 bit operating systems.
On 64 bit Windows you should be able to run both 32 and 64 bit executables, you just need a non-prehistoric compiler to produce the executable.
Look into MinGW (GCC) and Visual Studio as already mentioned … Read More
I see people using Turbo C++ sometimes, but this might be my first spot of plain Turbo C in the wild :p
For the history buffs, the last version of Turbo C was released in 1989, and made 16 bit executables for DOS.
For those to whom that means nothing, … Read More
Asking how to generate 64bit executables using TurboC is like asking how to send Instagrams with a [rotary phone](http://en.wikipedia.org/wiki/Rotary_dial).
Just download [CodeBlocks](http://www.codeblocks.org/downloads/26) or [Visual Studio Express](http://www.visualstudio.com/en-us/products/visual-studio-express-vs.aspx), both are free. Read More