c语言case用法return,C语言实现的一个万年历小程序

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我是靠谱客的博主落寞海燕，这篇文章主要介绍c语言case用法return,C语言实现的一个万年历小程序，现在分享给大家，希望可以做个参考。

#include

#define Mon 1

#define Tues 2

#define Wed 3

#define Thur 4

#define Fri 5

#define Sat 6

#define Sun 0

#define January_days 31

#define February_days 28

#define March_days 31

#define April_days 30

#define May_days 31

#define June_days 30

#define July_days 31

#define August_days 31

#define September_days 30

#define October_days 31

#define November_days 30

#define December_days 31

#define first1month January_days

#define first2month January_days+February_days

#define first3month January_days+February_days+March_days

#define first4month January_days+February_days+March_days+April_days

#define first5month January_days+February_days+March_days+April_days+May_days

#define first6month January_

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