The digital clock project in C is a programming exercise that creates a simple digital clock that displays the current time in hours, minutes, and seconds. This project utilizes the C programming language, which allows for managing time and clock functions. The digital clock project typically involves the creation of functions to fetch the current time from the system, which includes obtaining hours, minutes, and seconds. These values are then stored in variables for manipulation and display on the screen. The project typically requires system libraries or header files to interact with the computer's clock functions. These libraries provide functions to fetch the current time and update the clock display in real time. Additionally, the project may involve using loops or timers to update the clock display continuously. Once the clock functionality is implemented, it is displayed on the computer screen. The display can be as simple as printing the time in a command-line interface or creating a graphical user interface (GUI) with a visual clock representation. The digital clock project allows programmers to exercise their knowledge of C programming concepts and gain familiarity with time and clock functions. It also provides practical experience in handling real-time updates and user interface design. Additionally, this project can serve as a building block for more complex applications involving time management or scheduling. Code Explanation: 1. The time() function retrieves the current time in seconds since the epoch (January 1, 1970). It returns the value of type time_t. 2. The localtime() function converts the time_t value to a structure containing the local time information, such as hours, minutes, and seconds. The returned pointer is assigned to currentTime. 3. The printf() function is used to print the current time in the format HH:MM:SS. 4. The sleep() function suspends the execution for 1 second, ensuring that the clock is updated every second. 5. system("clear") is used to clear the screen after each second, creating the effect of a real-time clock. Note: This code uses the sleep() function, which is available on UNIX-like systems. If you are using Windows, you can replace it with the Sleep() function from the windows.h header file.

1. DIGITAL CLOCK
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Submitted by:
MD Shakil Hossain
Yeasmin Akter Mitu
Md Asaduzzaman
Submitted To:
Dr M Shamim Kaiser
Associate Professor
Institute of Information Technology
Jahangirnagar University
Project Presentation

3. Contents
Introduction
- About Digital Clock.
- History of Digital Clock.
We Used.
Project Output Screenshots.
Uses of Digital Clock.
Conclusion
- Advantage of Digital Clock.
- Future Plan. 3

4. Introduction Of Digital Clock
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5. About Digital Clock
What is Digital Clock?
- A digital clock is a type of clock
that displays time digitally.
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6. History of Digital Clock
The first digital pocket watch was the invention of
Austrian engineer Josef Pallweber who created his
“jump-hour” mechanism in 1883.
The earliest patent for a digital alarm clock was
registered by D.E. Protmann and other on October
23,1956,in the United States.
The Hamilton Watch Company introduced the first digital
wristwatch that included an LED display in 1970.
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7. We Used
 C Programming Language.
 Text Editor.
 Computer.
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8. Project Output Screenshots
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Project Output Screenshots

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Project Output Screenshots

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Project Output Screenshots

12. Uses of Digital Clock
 Digital Clocks are used in
different kinds of devices
such as homes, cars, radios,
televisions, microwave
ovens, computers and cell
phones.
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13. Conclusion of Digital Clock
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14. Advantage of Digital Clock
 Less expensive.
 Easy to understand time concept.
 Give time more accurately than
analog clock.
 Easier to read time.
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15. Future Plan
Set Time setting, off and
on system.
Set Date system.
Set Alarm system.
Set Days name system.
Set Temperature system.
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16. References
 www.google.com
 www.Wikipedia.org
 www.includehelp.com
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17. Thank you!
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