int __cdecl tolower(int);
int __cdecl toupper(int);
+clock_t __cdecl clock (void);
+time_t __cdecl time (time_t*);
+double __cdecl difftime (time_t, time_t);
+time_t __cdecl mktime (struct tm*);
char* __cdecl asctime (const struct tm*);
char* __cdecl ctime (const time_t*);
struct tm* __cdecl gmtime (const time_t*);