Introduction

     Time is a fundamental aspect of our lives, and in programming, we often encounter scenarios where we need to manipulate and represent time in different formats. In this blog post, we'll explore a C program that converts time from the 24-hour format to the more common 12-hour format. We'll analyze the code step by step and understand how it accomplishes this conversion.  


Code

    
     
        // Program to convert 24 hour time into 12 hour time
        #include<stdio.h>
        #include<conio.h>
        struct time
        {
        int h;
        int m;
        int s;
        };
        void main()
        {
        struct time tt;
        clrscr();
        printf("enter the hour,min,sec:");
        scanf("%d%d%d",&tt.h,&tt.m,&tt.s);
        if(tt.h>12)
        {
        tt.h=tt.h-12;
        }
        printf("the 12hr time for given time is:\n");
        printf("%d:%d:%d",tt.h,tt.m,tt.s);
        getch();
        }


Output

    
        // Output
        // Output
        enter the hour,min,sec:16 30 12
        the 12hr time for given time is:
        4:30:12


Explanation

 1. Header Files: The program includes standard input/output and console functions using and . 
 2. Structure Definition: A structure named time is defined to represent the hour (h), minute (m), and second (s) components of time. 
3. Main Function: The main function initializes a variable tt of type struct time to store the user-input time. 
4. User Input: The program prompts the user to enter the hour, minute, and second using scanf().
5. Time Conversion: If the entered hour (tt.h) is greater than 12, it subtracts 12 from the hour to convert the time to the 12-hour format. 
6. Output: The converted time is then displayed in the 12-hour format using printf().
7. User Interaction: The program waits for a key press before closing the console window using getch().


Conclusion

     This C program demonstrates a simple yet practical application of structures and conditional statements to convert time from the 24-hour format to the 12-hour format. Understanding such programs not only enhances programming skills but also provides insights into real-world applications where time representations vary based on conventions. The ability to manipulate time formats is essential in various programming scenarios, making this example valuable for learners and developers alike.