C语言如何用一个函数返回一个日期的月日

Question

C语言如何用一个函数getweek，传入两个参数，表示2023一个日期的月日，返回日期的星期

Answer 1

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

char *getweek(int month, int day)
{
    struct tm timeinfo = {0};
    timeinfo.tm_year = 2023 - 1900;
    timeinfo.tm_mon = month - 1;
    timeinfo.tm_mday = day;
    time_t time_stamp = mktime(&timeinfo);
    struct tm *local_time = localtime(&time_stamp);
    static char week_name[10];
    strftime(week_name, sizeof(week_name), "%A", local_time);
    return week_name;
}

int main()
{
    int month = 4, day = 25;
    char *week = getweek(month, day);
    printf("%d/%d/2023 is %s\n", month, day, week);
    return 0;
}