Question

How to get the current hour of the current date in C

Answer 1

#include <stdio.h>
#include <time.h>

// size_t strftime(char *str, size_t maxsize, const char *format, const struct tm *timeptr)

int main() {
    time_t t = time(NULL);

    struct tm dt = *localtime(&t);

    printf("%d-%02d-%02d %02d:%02d:%02d\n", dt.tm_year + 1900, dt.tm_mon + 1, dt.tm_mday, dt.tm_hour, dt.tm_min, dt.tm_sec);

    char buffer[32];

    strftime(buffer, sizeof(buffer), "%I", &dt);
    puts(buffer);

    return 0;
}




/*
run:

2023-05-14 16:10:51
04

*/

 

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Answer 2

#include <stdio.h>
#include <time.h>

// size_t strftime(char *str, size_t maxsize, const char *format, const struct tm *timeptr)

int main() {
    time_t t = time(NULL);

    struct tm dt = *localtime(&t);

    printf("%d-%02d-%02d %02d:%02d:%02d\n", dt.tm_year + 1900, dt.tm_mon + 1, dt.tm_mday, dt.tm_hour, dt.tm_min, dt.tm_sec);

    char buffer[32];

    strftime(buffer, sizeof(buffer), "%H", &dt);
    puts(buffer);

    return 0;
}




/*
run:

2023-05-14 16:13:00
16

*/

 

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