Using DS3231 Real-time Clock Modules with Arduino UNO

Hello guys! I am new Arduino user. I want to use DS3231 real-time clock. When I run the code, error appears in screen:

I will appreciate if you can help me to solve this problem! The code that I used is attached
Arduino: 1.6.12 (Windows 10), Board: “Arduino/Genuino Uno”

Sketch uses 4,110 bytes (12%) of program storage space. Maximum is 32,256 bytes.
Global variables use 472 bytes (23%) of dynamic memory, leaving 1,576 bytes for local variables. Maximum is 2,048 bytes.
avrdude: ser_open(): can’t open device “\.\COM5”: The system cannot find the file specified.

Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
Invalid library found in C:\Users\Salamat B\Documents\Arduino\libraries_RTCtime: C:\Users\Salamat B\Documents\Arduino\libraries_RTCtime
Invalid library found in C:\Users\Salamat B\Documents\Arduino\libraries_RTCtime: C:\Users\Salamat B\Documents\Arduino\libraries_RTCtime

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

_RTCtime.ino (2.93 KB)

To what COM port you connected the Arduino? Did you choose the right board?

I just realize that I did not choose COM port. Now, it works! Thank you Sarouje!