单片机公历农历转换程序
我相信，只要有一定的阳历知识。写一点万年阳历没问题的，但是阴历是我们中国人自己编立的，其时间更能反映节气，气候，季节，日复一日，年复一年有规律的变化。
农历按照全年的自然日划分为四季、二十四节气和年节。农历的二十四节气包括：春季的立春、雨水、惊蛮、春分、清明、谷雨；夏季的立夏、小满、芒种、夏至、小暑、大暑；秋季的立秋、处暑、白露、秋分、寒露、霜降；冬季的立冬、小雪、大雪、冬至、小寒、大寒。此外，全年中的月份按照月相变化周期而设置。即大月30天，小月29天。农历每月的初一称为“朔”，每月的十五称为“望”。在“朔”日，月球运行到太阳与地球之间，暗影对着地球，而与太阳同时出没，于是人们看不到月亮。在“望”日，地球运行到了太阳与月球中间，太阳从西方落下，月亮从东方升起，因而能看到满月。由于农历一年约为355日，与地球年相差约11日左右，所以每3年要置一闰月，每19年要置7个闰月。有闰月的年份也叫闰年。
农历一年按12个朔望月计算，只有354.4天，比阳历回归年少10.9天。如果去年不安插闰二月，那么，去年春节就会出现在2005年1月10日。再过几年，农历就会出现“六月飞雪”的现象。为了协调阴历与阳历的季节关系，我国在春秋时代就采用“十九年七闰月”，即在19个回归年（6939.6天）中，农历要安插七个闰月。19个农历年有228个朔望月，再加上七个闰月，就有235个朔望月（6939.7天）。因此，农历19年安插七个闰月，就能使农历的寒暑变化与公历基本一致。我们希望m个回归年的天数与n个朔望月的天数相等，也即m×365.2422=n×29.5306
这么看来，阴历的算法其实即使一个天文数据的处理过过程。为了使程序简明，我们可以把阴历的具体数据用数组保存起来，这样我们有了准确的阴历数据了。我们只需要查表，进过换算就可以得到阴历，
经过本人对函数的优化修改，编译后代码比原来少了近300?字节。
/****************************************************/
/*?获取当前日期的农历及星期*/
/****************************************************/
/*==================================================*/
/*公历年对应的农历数据,每年三字节,?格式: */
/*第一字节BIT7-4?位表示闰月月份,值为0?为无闰月, */
/*BIT3-0?对应农历第1-4?月的大小*/
/*第二字节BIT7-0?对应农历第5-12月大小, */
/*第三字节BIT7?表示农历第13?个月大小月份对应的位*/
/*为1?表示本农历月大(30?天),为0?表示小(29?天) */
/*第三字节BIT6-5?表示春节的公历月份,BIT4-0?表示春节的公历日期*/
/*类型:Byte:unsigned char Word:unsigned int */
/*
本代码中Tim[0]/Tim[1]/Tim[2]分别为当前年月日数据*/
/*其中Tim[0]Bit7?表示世纪,1为20?世纪19xx,0?为21?世纪20xx*/
/*Tim[10]为周数据/Tim[7]/Tim[8]/Tim[9]为农历数据,根据需要自行更换*/
/*==================================================*/
#include
Byte code year_code[597]={
0x04,0xAe,0x53,0x0A,0x57,0x48,0x55,0x26,0xBd,// 1901-1903
0x0d,0x26,0x50,0x0d,0x95,0x44,0x46,0xAA,0xB9,// 1904-1906
0x05,0x6A,0x4d,0x09,0xAd,0x42,0x24,0xAe,0xB6,// 1907-1909
0x04,0xAe,0x4A,0x6A,0x4d,0xBe,0x0A,0x4d,0x52,// 1910-1912
0x0d,0x25,0x46,0x5d,0x52,0xBA,0x0B,0x54,0x4e,// 1913-1915
0x0d,0x6A,0x43,0x29,0x6d,0x37,0x09,0x5B,0x4B,// 1916-1918
0x74,0x9B,0xC1,0x04,0x97,0x54,0x0A,0x4B,0x48,// 1919-1921
0x5B,0x25,0xBC,0x06,0xA5,0x50,0x06,0xd4,0x45,// 1922-1924
0x4A,0xdA,0xB8,0x02,0xB6,0x4d,0x09,0x57,0x42,// 1925-1927
0x24,0x97,0xB7,0x04,0x97,0x4A,0x66,0x4B,0x3e,// 1928-1930
0x0d,0x4A,0x51,0x0e,0xA5,0x46,0x56,0xd4,0xBA,// 1931-1933
0x05,0xAd,0x4e,0x02,0xB6,0x44,0x39,0x37,0x38,// 1934-1936
0x09,0x2e,0x4B,0x7C,0x96,0xBf,0x0C,0x95,0x53,// 1937-1939
0x0d,0x4A,0x48,0x6d,0xA5,0x3B,0x0B,0x55,0x4f,// 1940-1942
0x05,0x6A,0x45,0x4A,0xAd,0xB9,0x02,0x5d,0x4d,// 1943-1945
0x09,0x2d,0x42,0x2C,0x95,0xB6,0x0A,0x95,0x4A,// 1946-1948
0x7B,0x4A,0xBd,0x06,0xCA,0x51,0x0B,0x55,0x46,// 1949-1951
0x55,0x5A,0xBB,0x04,0xdA,0x4e,0x0A,0x5B,0x43,// 1952-1954
0x35,0x2B,0xB8,0x05,0x2B,0x4C,0x8A,0x95,0x3f,// 1955-1957
0x0e,0x95,0x52,0x06,0xAA,0x48,0x7A,0xd5,0x3C,// 1958-1960
0x0A,0xB5,0x4f,0x04,0xB6,0x45,0x4A,0x57,0x39,// 1961-1963
0x0A,0x57,0x4d,0x05,0x26,0x42,0x3e,0x93,0x35,// 1964-1966
0x0d,0x95,0x49,0x75,0xAA,0xBe,0x05,0x6A,0x51,// 1967-1969
0x09,0x6d,0x46,0x54,0xAe,0xBB,0x04,0xAd,0x4f,// 1970-1972
0x0A,0x4d,0x43,0x4d,0x26,0xB7,0x0d,0x25,0x4B,// 1973-1975
0x8d,0x52,0xBf,0x0B,0x54,0x52,0x0B,0x6A,0x47,// 1976-1978
0x69,0x6d,0x3C,0x09,0x5B,0x50,0x04,0x9B,0x45,// 1979-1981
0x4A,0x4B,0xB9,0x0A,0x4B,0x4d,0xAB,0x25,0xC2,// 1982-1984
0x06,0xA5,0x54,0x06,0xd4,0x49,0x6A,0xdA,0x3d,// 1985-1987
0x0A,0xB6,0x51,0x09,0x37,0x46,0x54,0x97,0xBB,// 1988-1990
0x04,0x97,0x4f,0x06,0x4B,0x44,0x36,0xA5,0x37,// 1991-1993
0x0e,0xA5,0x4A,0x86,0xB2,0xBf,0x05,0xAC,0x53,// 1994-1996
0x0A,0xB6,0x47,0x59,0x36,0xBC,0x09,0x2e,0x50,// 1997-1999
0x0C,0x96,0x45,0x4d,0x4A,0xB8,0x0d,0x4A,0x4C,// 2000-2002
0x0d,0xA5,0x41,0x25,0xAA,0xB6,0x05,0x6A,0x49,// 2003-2005
0x7A,0xAd,0xBd,0x02,0x5d,0x52,0x09,0x2d,0x47,// 2006-2008
0x5C,0x95,0xBA,0x0A,0x95,0x4e,0x0B,0x4A,0x43,// 2009-2011
0x4B,0x55,0x37,0x0A,0xd5,0x4A,0x95,0x5A,0xBf,// 2012-2014
0x04,0xBA,0x53,0x0A,0x5B,0x48,0x65,0x2B,0xBC,// 2015-2017
0x05,0x2B,0x50,0x0A,0x93,0x45,0x47,0x4A,0xB9,// 2018-2020
0x06,0xAA,0x4C,0x0A,0xd5,0x41,0x24,0xdA,0xB6,// 2021-2023
0x04,0xB6,0x4A,0x69,0x57,0x3d,0x0A,0x4e,0x51,// 2024-2026
0x0d,0x26,0x46,0x5e,0x93,0x3A,0x0d,0x53,0x4d,// 2027-2029
0x05,0xAA,0x43,0x36,0xB5,0x37,0
x09,0x6d,0x4B,// 2030-2032
0xB4,0xAe,0xBf,0x04,0xAd,0x53,0x0A,0x4d,0x48,// 2033-2035
0x6d,0x25,0xBC,0x0d,0x25,0x4f,0x0d,0x52,0x44,// 2036-2038
0x5d,0xAA,0x38,0x0B,0x5A,0x4C,0x05,0x6d,0x41,// 2039-2041
0x24,0xAd,0xB6,0x04,0x9B,0x4A,0x7A,0x4B,0xBe,// 2042-2044
0x0A,0x4B,0x51,0x0A,0xA5,0x46,0x5B,0x52,0xBA,// 2045-2047
0x06,0xd2,0x4e,0x0A,0xdA,0x42,0x35,0x5B,0x37,// 2048-2050
0x09,0x37,0x4B,0x84,0x97,0xC1,0x04,0x97,0x53,// 2051-2053
0x06,0x4B,0x48,0x66,0xA5,0x3C,0x0e,0xA5,0x4f,// 2054-2056
0x06,0xB2,0x44,0x4A,0xB6,0x38,0x0A,0xAe,0x4C,// 2057-2059
0x09,0x2e,0x42,0x3C,0x97,0x35,0x0C,0x96,0x49,// 2060-2062
0x7d,0x4A,0xBd,0x0d,0x4A,0x51,0x0d,0xA5,0x45,// 2063-2065
0x55,0xAA,0xBA,0x05,0x6A,0x4e,0x0A,0x6d,0x43,// 2066-2068
0x45,0x2e,0xB7,0x05,0x2d,0x4B,0x8A,0x95,0xBf,// 2069-2071
0x0A,0x95,0x53,0x0B,0x4A,0x47,0x6B,0x55,0x3B,// 2072-2074
0x0A,0xd5,0x4f,0x05,0x5A,0x45,0x4A,0x5d,0x38,// 2075-2077
0x0A,0x5B,0x4C,0x05,0x2B,0x42,0x3A,0x93,0xB6,// 2078-2080
0x06,0x93,0x49,0x77,0x29,0xBd,0x06,0xAA,0x51,// 2081-2083
0x0A,0xd5,0x46,0x54,0xdA,0xBA,0x04,0xB6,0x4e,// 2084-2086
0x0A,0x57,0x43,0x45,0x27,0x38,0x0d,0x26,0x4A,// 2087-2089
0x8e,0x93,0x3e,0x0d,0x52,0x52,0x0d,0xAA,0x47,// 2090-2092
0x66,0xB5,0x3B,0x05,0x6d,0x4f,0x04,0xAe,0x45,// 2093-2095
0x4A,0x4e,0xB9,0x0A,0x4d,0x4C,0x0d,0x15,0x41,// 2096-2098
0x2d,0x92,0xB5, // 2099
};
//月份天数数据表
Byte codeday_code1[9]={0x0,0x1f,0x3b,0x5a,0x78,0x97,0xb5,0xd4,0xf3};
Word codeday_code2[3]={0x111,0x130,0x14e};
//月修正数据表
Byte codeweek_code[12]={0,3,3,6,1,4,6,2,5,0,3,5};
void Conver_week(void)
/*=======获取当前日期的星期====================================*/
{
Byte temp1,temp2,year,month,day;
year =Tim[0]&0x7f; //加载年月日数据,如为BCD?则需转为十进制
month=Tim[1];
day =Tim[2];
if(Tim[0]>>7==0){year+=0x64;} //如果为21?世纪,年份数加100
temp1=year/0x4; //所过闰年数只算1900?年之后的
temp2=(year+temp1)%0x7; //为节省资源,先进行一次取余,避免数
大于0xff
temp2=temp2+day+week_code[month-1];
if(year%0x4==0&&month<3)temp2-=1;//如果是闰年但不到3?月则减一天
Tim[10]=temp2%0x7; //将星期数据写到指定星期变量Tim[9]
}
bit get_moon_day(Byte month_p,Wordcode_addr)
/*读取数据表中农历月的大月或小月,如果该月大返回1,小返回0*/
{
Byte temp,temp1;
temp1=(month_p+3)/8;
temp=0x80>>((month_p+3)%8);
temp=year_code[code_addr+temp1]&temp;
if(temp==0){return(0);}else{return(1);}
}
void Conversion(void)
/*==转换当前农历信息====================================*/
{
Byte year,month,day;
Byte temp1,temp2,temp3,month_p;
Word temp4,code_addr;
bit flag2,flag_y;
year =Tim[0]&0x7f; //加载年月日数据,如为BCD?则需转为十进制
month=Tim[1];
day =Tim[2];
code_addr=year-1; //定位数据表地址
if(Tim[0]>>7==0)code_addr+=0x64;
code_addr*=3;
temp1=year_code[code_addr+2]&0x60;//取当年春节所在的公历月
份
temp1=_cror_(temp1,5);
temp2=year_code[code_addr+2]&0x1f;//取当年春节所在的公历日
temp3=temp2-1; //计算当年春节离当年元旦的天数,春节只会在公
历1?月或2?月
if(temp1!=1)temp3+=0x1f;
if(month<10){temp4=day_code1[month-1]+day;}
else{temp4=day_code2[month-10]+day;}
if((month<2)||(year%0x04!=0))temp4-=1;//如果公历月小于2?月或者该
年的2?月非闰月,天数减1
if (temp4>=temp3) //判断公历日在春节前还是春节后
{
//公历日在春节后或就是春节当日使用下面代码进行运算
temp4 -=temp3;
month = 1;
flag_y = 0;
month_p= 1; //month_p?为月份指向,公历日在春节前或就是春节当
日month_p?指向首月
flag2=get_moon_day(month_p,code_addr);//检查该农历月为大
小还是小月,大月返回1,小月返回0
if(flag2==0){temp1=29;}else{temp1=30;}//小月29天、大月30?天
temp2=year_code[code_addr]&0xf0;
temp2=_cror_(temp2,4); //从数据表中取该年的闰月月份,如为0?则
该年无闰月
while(temp4>=temp1)
{
temp4-=temp1;
month_p+=1;
if(month==temp2)
{
flag_y=~flag_y;
if(flag_y==0)month+=1;
}
else month+=1;
flag2=get_moon_day(month_p,code_addr);
if(flag2==0)temp1=0x1d;
else temp1=0x1e;
}
day=temp4+1;
}
else
{
//公历日在春节前使用下面代码进行运算
temp3-=temp4;
if(year==0){year=0xe3;}else{year-=1;}
code_addr-=3;
month = 0xc;
temp2 = year_code[code_addr]&0xf0;
temp2 = _cror_(temp2,4);
flag_y = 0;
if(temp2==0){month_p=12;}else{month_p=13;}//如果当年有闰月,
一年有十三个月,月指向13,无闰月指向12
flag2=get_moon_day(month_p,code_addr);
if(flag2==0){temp1=29;}else{temp1=30;}
while(temp3>temp1)
{
temp3-=temp1;
month_p-=1;
if(flag_y==0)month-=1;
if(month==temp2)flag_y=~flag_y;
flag2=get_moon_day(month_p,code_addr);
if(flag2==0){temp1=0x1d;}else{temp1=0x1e;}
}
day=temp1-temp3+1;
}
Tim[7] = year|(Tim[0]&0x80);; //将农历信息写进指定变量
Tim[8] = month;
Tim[9] = day;
Conver_week(); //最后进行星期转换(根据需要自行选用)
}