Mac Forum / Programming / Mac Programming / October 2005

Hello,

I have a little question. I want to use 64 bit integer math (both G4/G5). I
thought the C++ defined 'long long' for 64-bit math, but if I print
sizeof(long long), returned value is 4. How to get this working?

My related questions are:

* Why is the sizeof(long long) 4?
* Do I need to add a GCC compiler switch to get this working?
* Do I need to use an another type (e.g. int64) and in which header file do
I need to include?

Thanks! Jos