#include <stdio.h> #include <stdlib.h> #define bitstr_size(nbits) \ ((((nbits) - 1) >> 3) + 1) #define FIRST_MINUTE 0 #define LAST_MINUTE 59 #define MINUTE_COUNT (LAST_MINUTE - FIRST_MINUTE + 1) #define bit_decl(name, nbits) \ (name)[bitstr_size(nbits)] typedef unsigned char bitstr_t; int main(void) { bitstr_t bit_decl(minute, MINUTE_COUNT); printf("s:%d",sizeof(minute)); printf("d:%d", ((60 - 1)>>3)); printf("f:%d", (((8)&0x7))); return 0; }