Question

I’m trying to use long for 12 digit number but it’s saying “integer constant is too large for “long” type”, and I tried it with C++ and Processing (similar to Java). What’s happening and what should I use for it?

Answer 1

I don’t know in C++, but in C, there is a header file called <stdint.h> that will portably have the integer types with the number of bits you desire.

int8_t 
int16_t
int32_t
int64_t

and their unsigned counterpart (uint8_t and etc).

Update: the header is called <cstdint> in C++