c语言函数输入xxxxxxxx日期date,计算当天是星期几？

Question

如题所述

Answer 1

#include <stdio.h>

#include <time.h>

int main() {

int year, month, day;

printf("Enter a date (yyyy-mm-dd): ");

scanf("%d-%d-%d", &year, &month, &day);

struct tm tm = {0};

tm.tm_year = year - 1900;

tm.tm_mon = month - 1;

tm.tm_mday = day;

tm.tm_isdst = -1;

time_t t = mktime(&tm);

char* weekday[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

printf("%s\n", weekday[localtime(&t)->tm_wday]);

return 0;

}

在这段代码中，使用了 time 库中的 mktime 函数和 localtime 函数来将日期转换为时间戳，并使用 tm_wday 字段来计算日期是星期几。