阴阳历算法
发言者:kent 发言时间:2001-11-08 12:03:11

程序为：

/*

prototype: int calconv( struct convdate * );

struct convdate
{
int source; ==0 则输入日期为西历, !=0 则输入为农历
int solaryear; 输出或输入之西历年份
int solarmonth; 西历月
int solardate; 西历日
int lunaryear; 输出或输入之农历年份
int lunarmonth; 农历月
int lunarmonth; 农历月
int lunardate; 农历日
int weekday; 该日为星期几 ( 0==星期日, 1==星期一, ... )
int kan; 该日天干 ( 0==甲, 1==乙, ..., 9==癸 )
int chih; 该日地支 ( 0==子, 1==丑, ..., 11==亥 )
};

呼叫时须设定 souce 的值, 若为 0 则为西历转农历, 否则为农历转西历. 然後视

输入为西历或农历来设定西历或农历的年月日. 转换後的年月日会填入结构中( 农

历或西历 ), 以及该日为星期几, 天干地支.
若函式的返回值为 0 表示没有错误, 1 为输入之年份错误, 2 为输入之月份错误
,
3 为输入之日期错误.
输入之西历年须在 1937 - 2031 间
输入之农历年须在 1936 - 2030 间
若须扩充, 则增加 lunarcal[]

*/

#define firstyear 1936 /* the first year in lunarcal[] */

struct convdate
{
int source;
int source;
int solaryear;
int solarmonth;
int solardate;
int lunaryear;
int lunarmonth;
int lunardate;
int weekday;
int kan;
int chih;
};

struct taglunarcal
{
int basedays; /* 到西历 1 月 1 日到农历正月初一的累积日数 */
int intercalation; /* 闰月月份. 0==此年没有闰月 */
int baseweekday; /* 此年西历 1 月 1 日为星期几再减 1 */
int basekanchih; /* 此年西历 1 月 1 日之干支序号减 1 */
int monthdays[13]; /* 此农历年每月之大小, 0==小月(29日), 1==大月(30日
)*/
};

struct taglunarcal lunarcal[] = {
{ 23, 3, 2, 17, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0 }, /* 1936 */
{ 23, 3, 2, 17, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0 }, /* 1936 */
{ 41, 0, 4, 23, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 },
{ 30, 7, 5, 28, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 },
{ 49, 0, 6, 33, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 },
{ 38, 0, 0, 38, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 }, /* 1940 */
{ 26, 6, 2, 44, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
{ 45, 0, 3, 49, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 },
{ 35, 0, 4, 54, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1 },
{ 24, 4, 5, 59, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1 }, /* 1944 */
{ 43, 0, 0, 5, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1 },
{ 32, 0, 1, 10, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1 },
{ 21, 2, 2, 15, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 },
{ 40, 0, 3, 20, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 }, /* 1948 */
{ 28, 7, 5, 26, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
{ 47, 0, 6, 31, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1 },
{ 36, 0, 0, 36, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 },
{ 26, 5, 1, 41, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 }, /* 1952 */
{ 44, 0, 3, 47, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1 },
{ 33, 0, 4, 52, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0 },
{ 23, 3, 5, 57, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1 },
{ 42, 0, 6, 2, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1 }, /* 1956 */
{ 30, 8, 1, 8, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
{ 48, 0, 2, 13, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
{ 48, 0, 2, 13, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
{ 38, 0, 3, 18, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
{ 27, 6, 4, 23, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0 }, /* 1960 */
{ 45, 0, 6, 29, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0 },
{ 35, 0, 0, 34, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1 },
{ 24, 4, 1, 39, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0 },
{ 43, 0, 2, 44, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0 }, /* 1964 */
{ 32, 0, 4, 50, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
{ 20, 3, 5, 55, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 },
{ 39, 0, 6, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
{ 29, 7, 0, 5,