Question

How to get the full and short name of the day of week of a given date in C

Answer 1

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

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

int main() {
    struct tm info;

    info.tm_year = 2023 - 1900; // from 1900
    info.tm_mon = 5 - 1; // 0..11
    info.tm_mday = 14; // 1..31
    info.tm_hour = 10; // 0..23
    info.tm_min = 02; // 0..59
    info.tm_sec = 15; // 0..59

    time_t t = mktime(&info);

    char buffer[32];

    if (t == -1) {
        printf("mktime error");
    }
    else {
        strftime(buffer, sizeof(buffer), "%A %a", &info);
        puts(buffer);
    }

    return 0;
}




/*
run:

Sunday Sun

*/

 

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