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C program to store time in an integer variable

mahmoud2506
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2022-05-03
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C program to store time in an integer variable

This program will read time in HH,MM,SS format and store it into an integer variable. After that we will extract time from that variable and print the date and HH, MM, SS format.

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mahmoud2506
2022-05-03
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Store Time in an Integer Variable using C program

/*C program to store time in an integer variable.*/

#include <stdio.h>

int main()
{
    int hh, mm, ss;
    int time;

    printf("Enter date (hh/mm/ss) format: ");
    scanf("%d:%d:%d", &hh, &mm, &ss);

    printf("\nEntered time is: %02d:%02d:%02d\n", hh, mm, ss);

    /*adding hh,mm,ss into time*/
    /*Range of hh,mm,ss are 0 to 59 and it can be stored
     *in 1+1+1 = 3 bytes*/

    time = 0;
    time |= (hh & 0xff); /*hh storing in byte 0*/
    time |= (mm & 0xff) << 8; /*mm storing in byte 1*/
    time |= (ss & 0xff) << 16; /*ss storing in byte 2*/

    printf("Time in single variable: %d [Hex: %08X] \n", time, time);

    /*Extracting hh,mm,ss from time (an integer value)*/

    hh = (time & 0xff); /*hh from byte 0*/
    mm = ((time >> 8) & 0xff); /*mm from byte 1*/
    ss = ((time >> 16) & 0xff); /*ss from byte 2*/

    printf("Time after extracting: %02d:%02d:%02d\n", hh, mm, ss);

    return 0;
}

Output:

    Enter date (hh/mm/ss) format: 11:11:11

    Entered time is: 11:11:11
    Time in single variable: 723723 [Hex: 000B0B0B] 
    Time after extracting: 11:11:11

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