該程式簡單地輸入乙個年份(2023年之後的年份)，隨後程式輸出該年份十二個月的日曆。
#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_days+february_days+march_days+april_days+may_days+june_days
#define first7month january_days+february_days+march_days+april_days+may_days+june_days \
+july_days
#define first8month january_days+february_days+march_days+april_days+may_days+june_days \
+july_days+august_days
#define first9month january_days+february_days+march_days+april_days+may_days+june_days \
+july_days+august_days+september_days
#define first10month january_days+february_days+march_days+april_days+may_days+june_days \
+july_days+august_days+september_days+october_days
#define first11month january_days+february_days+march_days+april_days+may_days+june_days \
+july_days+august_days+september_days+october_days+november_days
int known_weekday = tues;
int known_year = 1901;
int konwn_month = 1;
int known_day = 1;
int day_count(int month)
}/*char * month_name(int month)
}*/char * month_name(int month)
}/*按格式列印某年某月名稱*/
void first_line_print(int month, int year)
/*按格式列印星期名稱*/
void week_print()
/*計算該年該月份與已知日子之間的距離天數*/
int date_distance_count(int month, int year)
}if (month > 2)}}
else
if (year == known_year)
}distance = (year - known_year)*365 + leap_year_count + day_count(month);
return distance;
}/*確定該月份第一天是星期幾*/
int makesure_firstday_weekday(int month, int year)
/*依次列印出該月份的日子*/
void print_in_turn(int month, int firstday, int year)
switch(month)
}break;
}case 2:
}break;
}else /*平年*/
}break;}}
case 4:
case 6:
case 9:
case 11:
}break;}}
}void date_print(int month, int year)
void main_month(int month, int year)
void main_calendar(int year)
}int main()
main_calendar(year);
scanf(" ");
return 0;
}執行效果圖：
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