ds3231_simple:12: Error: 'ds3231 clock' redeclared as different kind of symbol

ds3231 clock;

^

in file included from c:\users\lenovo\appdata\local\arduino15\packages\a rduino\tools\arm-none-eabi-gcc\4.8.3-2014q1\arm-none-eabi\include\stdlib.h:11:0,

from c:\users\lenovo\appdata\local\arduino15\packages\a rduino\hardware\sam\1.6.7\cores\arduino/arduino.h:24,

from sketch\ds3231_simple.ino.cpp:1:

C:\users\lenovo\appdata\local\arduino15\packages\a rduino\tools\arm-none-eabi-gcc\4.8.3-2014q1\arm-none-eabi\include\time.h:44:12: Error: Previous declaration of 'clock_t clock()'

clock_t _exfun(clock, (void));

^

c:\users\lenovo\desktop\arduino ide\libraries\arduino-ds3231-master\ds3231_simple\ds3231_simple.ino: In function 'void setup()':

Ds3231_simple:21: Error: Request for member 'begin' in 'clock', which is of non-class type 'clock_t() {aka long unsigned int()}'

clock.begin();

^

ds3231_simple:24: Error: Request for member 'setdatetime' in 'clock', which is of non-class type 'clock_t() {aka long unsigned int()}'

clock.setdatetime(__date__, __time__);

^

c:\users\lenovo\desktop\arduino ide\libraries\arduino-ds3231-master\ds3231_simple\ds3231_simple.ino: In function 'void loop()':

Ds3231_simple:29: Error: Request for member 'getdatetime' in 'clock', which is of non-class type 'clock_t() {aka long unsigned int()}'

dt = clock.getdatetime();

^

exit status 1
'ds3231 clock' redeclared as different kind of symbol
پیام خطای بالا نمایش داده می شه وقتی می خوام بریزم روی برد due ولی خوب روی uno مشکلی نداره