c - 从 yyyymmdd 转换为日、月、日、年

Question

可能重复：
C程序查找给定日期的星期几

我有一个日历文件，日期为“20121027T190000”，我需要将其转换为“1900 年 10 月 27 日，星期三”。是否有计算星期几的 C 函数？

Answer 1

Yes, the standard localtime() function converts from a time_t to a struct tm that includes the day of the week. To create a time_t value, you can use the mktime() function to convert from a struct tm to a time_t (you do not have to fill in the day of the week when using mktime()).

This might seem like a roundabout way to do this, but it's reasonably straightforward and uses standard library functions.