C Program Using time_struct to Display Time in HH:MM:SS Format

Structure Definition: time_struct

Here’s how you define the structure to hold time-related information:

struct time_struct {
    int hour;
    int minute;
    int second;
};

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Objective

• Define a structure named time_struct
• Members: hour, minute, second (all integers)
• Assign values manually
• Print time in format HH:MM:SS

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Full C Program Example

#include <stdio.h>

// Define the time structure
struct time_struct {
    int hour;
    int minute;
    int second;
};

int main() {
    // Declare and assign values
    struct time_struct currentTime;

    currentTime.hour = 16;
    currentTime.minute = 40;
    currentTime.second = 51;

    // Display the time in HH:MM:SS format
    printf("Current Time: %02d:%02d:%02d\n", currentTime.hour, currentTime.minute, currentTime.second);

    return 0;
}

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Sample Output

Current Time: 16:40:51

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Explanation

• The structure groups time components under a single variable.
• Values are manually assigned to each member.
• The format specifier %02d ensures that single-digit numbers are displayed with a leading zero for proper formatting.

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Real-Life Use Case

Using a time_struct like this is ideal when:

• Building clock or timer programs.
• Working with logging systems that record time.
• Structuring time data in scheduling or alarms.

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Tip

You can also create an array of time_struct to store multiple timestamps or use functions to manipulate time values in a modular program.

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Conclusion

This program clearly demonstrates how to define a structure and use it to format time in C. The time_struct structure makes your code more readable, modular, and scalable—perfect for real-world time-based logic.

Mastering C structures like this one is essential for building real-world applications that manage related data types.