typedef struct real_time { int year; int month; int day; int hours; int minutes; int seconds; } real_time; extern unsigned long get4(); extern unsigned long get4i(); extern unsigned long get2(); extern unsigned long get2i(); extern unsigned char getb(); extern void copy(); extern int do_query(); extern void put4(); extern void put2(); extern void do_indent(); extern real_time set_time(); extern unsigned long tomactime(); extern real_time frommactime();