public link bit  = driver.second;
public link bit  = driver.minute;
public link bit ʱ = driver.hour;
public link bit  = driver.day;
public link bit  = driver.month;
public link bit  = driver.year;
public link void OS_init(){} = driver.OS_init;
public link void ʱΪ_(bit n1){} = driver.set_time;
public link void ǰʱ(){} = driver.get_time;
