When should I just use “int” versus more sign-specific or size-specific types?

Question

I have a little VM for a programming language implemented in C. It supports being compiled under both 32-bit and 64-bit architectures as well as both C and C++.

I\'m try

Answer 1

Keep large numbers that are used to access members of arrays, or control buffers as size_t.

For an example of a project that makes use of size_t, refer to GNU's dd.c, line 155.