error: unknown type name 'intptr_t'

Question

I am receiving this error while compiling a C program in MinGW. As far as I know, I thought 'intptr_t' was a type in the C99 standard. Am I not including a file?

Answer 1

You need to include stdint.h.

Note that intptr_t and uintptr_t are indeed C99 types but they are optional.