Paulo Matos wrote: > I'd like to have access to 64 bits. I think unsigned long long is 64 > bits in g++ although I'm not sure. Is there a way to know which type is > 64 bits long or not?
#include <stdint.h> and use uint64_t. On systems that lack that header, <inttypes.h> might provide some replacement. In any case work with a typedef that shows that you want 64 bits. > Still, even if I know that unsigned long long is 64 bits long, how can > I know that it will occupy only two registers in a 32bit PC, or 1 > register in a 64bit PC? Is there a way to make sure a 64 bit value, be > it an unsigned long long or a unsigned char v[8] to be kept on 2 > registers or 1 in 32 bit or 64 bit PC respectively? Generally, you can't know that portably in C++. Why do you think you need to? Uli -- http://gcc.gnu.org/faq.html http://parashift.com/c++-faq-lite/ _______________________________________________ help-gplusplus mailing list help-gplusplus@gnu.org http://lists.gnu.org/mailman/listinfo/help-gplusplus
