由于C++語言誕生的比較早,所以不像.NET那樣官方自帶公歷轉(zhuǎn)農(nóng)歷的代碼庫,因此只能通過自己來實(shí)現(xiàn)
今天是農(nóng)歷幾月幾日星期幾的查詢.
以下文件在linux g++ (GCC) 4.1.2 環(huán)境編譯通過
//file: lunarday.h
//author: cuichaox@gmail.com
//2007-02-13 11:22:04
#ifndef LUANR_CALENDAR_H
#define LUANR_CALENDAR_H
namespace lunar
{
//保存一個(gè)農(nóng)歷日期
typedef struct T_Date
{
//年
int year;
//月
int month;
//日
int day;
//是否閏月
bool leap;
} Date;
//公歷轉(zhuǎn)農(nóng)歷
Date LuanrDate(int solar_year,int solar_month,int solar_day);
}
//file: lunarday.cpp
//author: cuichao@gmail.com
//2007-02-13 11:22:48
#include "lunarday.h"
#include <ctime>
#include <cassert>
#include <cstring>
#include <iostream>
using namespace std;
using lunar::Date;
//使用比特位記錄每年的情況
//0~4 共5bit 春節(jié)日份
//5~6 共2bit 春節(jié)月份
//7~19 共13bit 13個(gè)月的大小月情況(如果無閏月，最后位無效)，大月為1,小月為0
//20~23 共4bit 記錄閏月的月份，如果沒有閏月為0
static const int BEGIN_YEAR = 1901;
static const int NUMBER_YEAR = 199;
static const unsigned int LUNAR_YEARS[199] = {
0x04AE53,0x0A5748,0x5526BD,0x0D2650,0x0D9544,
0x46AAB9,0x056A4D,0x09AD42,0x24AEB6,0x04AE4A, //1901-1910
0x6A4DBE,0x0A4D52,0x0D2546,0x5D52BA,0x0B544E,
0x0D6A43,0x296D37,0x095B4B,0x749BC1,0x049754, //1911-1920
0x0A4B48,0x5B25BC,0x06A550,0x06D445,0x4ADAB8,
0x02B64D,0x095742,0x2497B7,0x04974A,0x664B3E, //1921-1930
0x0D4A51,0x0EA546,0x56D4BA,0x05AD4E,0x02B644,
0x393738,0x092E4B,0x7C96BF,0x0C9553,0x0D4A48, //1931-1940
0x6DA53B,0x0B554F,0x056A45,0x4AADB9,0x025D4D,
0x092D42,0x2C95B6,0x0A954A,0x7B4ABD,0x06CA51, //1941-1950
0x0B5546,0x555ABB,0x04DA4E,0x0A5B43,0x352BB8,
0x052B4C,0x8A953F,0x0E9552,0x06AA48,0x7AD53C, //1951-1960
0x0AB54F,0x04B645,0x4A5739,0x0A574D,0x052642,
0x3E9335,0x0D9549,0x75AABE,0x056A51,0x096D46, //1961-1970
0x54AEBB,0x04AD4F,0x0A4D43,0x4D26B7,0x0D254B,
0x8D52BF,0x0B5452,0x0B6A47,0x696D3C,0x095B50, //1971-1980
0x049B45,0x4A4BB9,0x0A4B4D,0xAB25C2,0x06A554,
0x06D449,0x6ADA3D,0x0AB651,0x093746,0x5497BB, //1981-1990
0x04974F,0x064B44,0x36A537,0x0EA54A,0x86B2BF,
0x05AC53,0x0AB647,0x5936BC,0x092E50,0x0C9645, //1991-2000
0x4D4AB8,0x0D4A4C,0x0DA541,0x25AAB6,0x056A49,
0x7AADBD,0x025D52,0x092D47,0x5C95BA,0x0A954E, //2001-2010
0x0B4A43,0x4B5537,0x0AD54A,0x955ABF,0x04BA53,
0x0A5B48,0x652BBC,0x052B50,0x0A9345,0x474AB9, //2011-2020
0x06AA4C,0x0AD541,0x24DAB6,0x04B64A,0x69573D,
0x0A4E51,0x0D2646,0x5E933A,0x0D534D,0x05AA43, //2021-2030
0x36B537,0x096D4B,0xB4AEBF,0x04AD53,0x0A4D48,
0x6D25BC,0x0D254F,0x0D5244,0x5DAA38,0x0B5A4C, //2031-2040
0x056D41,0x24ADB6,0x049B4A,0x7A4BBE,0x0A4B51,
0x0AA546,0x5B52BA,0x06D24E,0x0ADA42,0x355B37, //2041-2050
0x09374B,0x8497C1,0x049753,0x064B48,0x66A53C,
0x0EA54F,0x06B244,0x4AB638,0x0AAE4C,0x092E42, //2051-2060
0x3C9735,0x0C9649,0x7D4ABD,0x0D4A51,0x0DA545,
0x55AABA,0x056A4E,0x0A6D43,0x452EB7,0x052D4B, //2061-2070
0x8A95BF,0x0A9553,0x0B4A47,0x6B553B,0x0AD54F,
0x055A45,0x4A5D38,0x0A5B4C,0x052B42,0x3A93B6, //2071-2080
0x069349,0x7729BD,0x06AA51,0x0AD546,0x54DABA,
0x04B64E,0x0A5743,0x452738,0x0D264A,0x8E933E, //2081-2090
0x0D5252,0x0DAA47,0x66B53B,0x056D4F,0x04AE45,
0x4A4EB9,0x0A4D4C,0x0D1541,0x2D92B5 //2091-2099
};
//計(jì)算這個(gè)公歷日期是一年中的第幾天
static int DayOfSolarYear(int year, int month, int day )
{
//為了提高效率，記錄每月一日是一年中的第幾天
static const int NORMAL_YDAY[12] = {1,32,60,91,121,152,
182,213,244,274,305,335};
//閏年的情況
static const int LEAP_YDAY[12] = {1,32,61,92,122,153,
183,214,245,275,306,336};
const int *t_year_yday_ = NORMAL_YDAY;
//判斷是否是公歷閏年
if( year % 4 ==0 )
{
if(year%100 != 0)
t_year_yday_ = LEAP_YDAY;
if(year%400 == 0)
t_year_yday_ = LEAP_YDAY;
}
return t_year_yday_[month -1] + (day -1);
}
Date lunar::LuanrDate(int solar_year,int solar_month,int solar_day)
{
Date luanr_date ;
luanr_date.year = solar_year;
luanr_date.month = 0;
luanr_date.day = 0;
luanr_date.leap = false;
//越界檢查，如果越界，返回?zé)o效日期
if(solar_year <= BEGIN_YEAR || solar_year > BEGIN_YEAR + NUMBER_YEAR - 1 )
return luanr_date;
int year_index = solar_year - BEGIN_YEAR;
//計(jì)算春節(jié)的公歷日期
int spring_ny_month = ( LUNAR_YEARS[year_index] & 0x60 ) >> 5;
int spring_ny_day = ( LUNAR_YEARS[year_index] & 0x1f);
//計(jì)算今天是公歷年的第幾天
int today_solar_yd = DayOfSolarYear(solar_year,solar_month,solar_day);
//計(jì)算春節(jié)是公歷年的第幾天
int spring_ny_yd = DayOfSolarYear(solar_year,spring_ny_month,spring_ny_day);
//計(jì)算今天是農(nóng)歷年的第幾天
int today_luanr_yd = today_solar_yd - spring_ny_yd + 1;
//如果今天在春節(jié)的前面，重新計(jì)算today_luanr_yd
if ( today_luanr_yd < 0)
{
//農(nóng)歷年比當(dāng)前公歷年小1
year_index --;
luanr_date.year --;
//越界，返回?zé)o效日期
if(year_index <0)
return luanr_date;
spring_ny_month = ( LUNAR_YEARS[year_index] & 0x60 ) >> 5;
spring_ny_day = ( LUNAR_YEARS[year_index] & 0x1f);
spring_ny_yd = DayOfSolarYear(solar_year,spring_ny_month,spring_ny_day);
int year_total_day = DayOfSolarYear(luanr_date.year,12,31);
today_luanr_yd = today_solar_yd + year_total_day - spring_ny_yd + 1;
}
int luanr_month = 1;
//計(jì)算月份和日期
for(;luanr_month<=13;luanr_month++)
{
int month_day = 29;
if( (LUNAR_YEARS[year_index] >> (6 + luanr_month)) & 0x1 )
month_day = 30;
if( today_luanr_yd <= month_day )
break;
else
today_luanr_yd -= month_day;
}
luanr_date.day = today_luanr_yd;
//處理閏月
int leap_month = (LUNAR_YEARS[year_index] >>20) & 0xf;
if(leap_month > 0 && leap_month < luanr_month )
{
luanr_month --;
//如果當(dāng)前月為閏月，設(shè)置閏月標(biāo)志
if( luanr_month == leap_month )
luanr_date.leap = true;
}
assert(leap_month <= 12);
luanr_date.month = luanr_month;
return luanr_date;
}
測(cè)試主函數(shù)，打印當(dāng)前農(nóng)歷日期
//file: chdate.cpp
//author: cuichaox@gmail.com
//2007-02-13 11:21:45
#include <iostream>
#include <ctime>
#include "lunarday.h"
int main(int argc, char *argv[])
{
using namespace std;
using namespace lunar;
time_t current_time;
time(¤t_time);
tm *current_tm = localtime(¤t_time);
int year = current_tm->tm_year + 1900;
int month = current_tm->tm_mon +1;
int day = current_tm->tm_mday;
Date lunar_date = LuanrDate(year,month,day);
cout<<lunar_date.year<<"年";
if(lunar_date.leap)
cout<<"閏";
cout<<lunar_date.month<<"月";
cout<<lunar_date.day<<"日";
cout<<endl;
return 0;
}
Makefile文件，如下
#makefile for chdate
CPP = g++
LD = g++
CC_FLAG =
LD_FLAG =
FILE_LIST = lunarday.cpp chdate.cpp
OBJ_LIST = $(FILE_LIST:%.cpp=%.o)
BIN = chdate
default: $(BIN)
$(BIN): $(OBJ_LIST)
$(LD) $(LD_FLAG) -o $(BIN) $(OBJ_LIST)
%.o : %.cpp
@$(CPP) $(CC_FLAG) -c $< -o $@
clean:
rm $(OBJ_LIST) $(BIN)
執(zhí)行效果如下
sideleft@doom:~/workspace/luanrday$ ./chdate
2006年12月26日