Size of int in C on different architectures

Question

I am aware that the specification of the C language does not dictate the exact size of each integer type (e.g., int).

What I am wondering is: Is there a

Answer 1

You could always write an arithmetic library that used vectors of unsigned char for the numbers. That way you could use numbers of whatever bit length you want, and even allow the bit length to vary.

Actually, you don't need to implement such a library because GNU MP handles this already.

http://gmplib.org/