In C, you only have char, short, int, long and long long (signed and unsigned). Other integer types like uint32_t and size_t are typedefs to those. If int is 64

In C, you only have char, short, int, long and long long (signed and unsigned). Other integer types like uint32_t and size_t are typedefs to those. If int is 64 bits and char is 8 bits, you have to choose if short is 16 or 32 bits, and other one won't exist at all. long really should be 64 bits of 64-bit systems, and it is on Linux. Windows kept it at 32 bits to make porting existing code easier.