主题：请教:谁能给一个公历和农历的对照算法.举个例子: -- 步战将军

var bsYear;

var bsDate;

var bsWeek;

var arrLen=8; //数组长度

var svalue=0; //当年的秒数

var dayiy=0; //当年第几天

var miy=0; //月份的下标

var iyear=0; //年份标记

var dayim=0; //当月第几天

var spd=86400; //每天的秒数

var year1999="30;29;29;30;29;29;30;29;30;30;30;29"; //354

var year2000="30;30;29;29;30;29;29;30;29;30;30;29"; //354

var year2001="30;30;29;30;29;30;29;29;30;29;30;29;30"; //384

var year2002="30;30;29;30;29;30;29;29;30;29;30;29"; //354

var year2003="30;30;29;30;30;29;30;29;29;30;29;30"; //355

var year2004="29;30;29;30;30;29;30;29;30;29;30;29;30"; //384

var year2005="29;30;29;30;29;30;30;29;30;29;30;29"; //354

var year2006="30;29;30;29;30;30;29;29;30;30;29;29;30";

var month1999="正月;二月;三月;四月;五月;六月;七月;八月;九月;十月;十一月;十二月"

var month2001="正月;二月;三月;四月;闰四月;五月;六月;七月;八月;九月;十月;十一月;十二月"

var month2004="正月;二月;闰二月;三月;四月;五月;六月;七月;八月;九月;十月;十一月;十二月"

var month2006="正月;二月;三月;四月;五月;六月;七月;闰七月;八月;九月;十月;十一月;十二月"

var Dn="初一;初二;初三;初四;初五;初六;初七;初八;初九;初十;十一;十二;十三;十四;十五;十六;十七;十八;十九;二十;廿一;廿二;廿三;廿四;廿五;廿六;廿七;廿八;廿九;三十";

var Ys=new Array(arrLen);

Ys[0]=919094400;Ys[1]=949680000;Ys[2]=980265600;

Ys[3]=1013443200;Ys[4]=1044028800;Ys[5]=1074700800;

Ys[6]=1107878400;Ys[7]=1138464000;

var Yn=new Array(arrLen); //农历年的名称

Yn[0]="己卯年";Yn[1]="庚辰年";Yn[2]="辛巳年";

Yn[3]="壬午年";Yn[4]="癸未年";Yn[5]="甲申年";

Yn[6]="乙酉年";Yn[7]="丙戌年";

var D=new Date();

var yy=D.getYear();

var mm=D.getMonth()+1;

var dd=D.getDate();

var ww=D.getDay();

if (ww==0) ww="<font color=RED>星期日";

if (ww==1) ww="星期一";

if (ww==2) ww="星期二";

if (ww==3) ww="星期三";

if (ww==4) ww="星期四";

if (ww==5) ww="星期五";

if (ww==6) ww="<font color=RED>星期六";

ww=ww;

var ss=parseInt(D.getTime() / 1000);

if (yy<100) yy="19"+yy;

for (i=0;i<arrLen;i++)

if (ss>=Ys[i]){

iyear=i;

svalue=ss-Ys[i]; //当年的秒数

}

dayiy=parseInt(svalue/spd)+1; //当年的天数

var dpm=year1999;

if (iyear==1) dpm=year2000;

if (iyear==2) dpm=year2001;

if (iyear==3) dpm=year2002;

if (iyear==4) dpm=year2003;

if (iyear==5) dpm=year2004;

if (iyear==6) dpm=year2005;

if (iyear==7) dpm=year2006;

dpm=dpm.split(";");

var Mn=month1999;

if (iyear==2) Mn=month2001;

if (iyear==5) Mn=month2004;

if (iyear==7) Mn=month2006;

Mn=Mn.split(";");

var Dn="初一;初二;初三;初四;初五;初六;初七;初八;初九;初十;十一;十二;十三;十四;十五;十六;十七;十八;十九;二十;廿一;廿二;廿三;廿四;廿五;廿六;廿七;廿八;廿九;三十";

Dn=Dn.split(";");

dayim=dayiy;

var total=new Array(13);

total[0]=parseInt(dpm[0]);

for (i=1;i<dpm.length-1;i++) total[i]=parseInt(dpm[i])+total[i-1];

for (i=dpm.length-1;i>0;i--)

if (dayim>total[i-1]){

dayim=dayim-total[i-1];

miy=i;

}

bsWeek=ww;

bsDate=yy+"年"+mm+"月";

bsDate2=dd;

bsYear="农历"+Yn[iyear];

bsYear2=Mn[miy]+Dn[dayim-1];

if (ss>=Ys[7]||ss<Ys[0]) bsYear=Yn[7];

function CAL(){

document.write("<table border='1' cellspacing='3' width='90' bordercolor='#009B00' bgcolor='#FFFFFF' height='110' cellpadding='2'");

document.write("<tr><td align='center'><b><font color=#008040>"+bsDate+"</font><br><font face='Arial' size='6' color=#FF8040>"+bsDate2+"</font><br><font color=#008040><span style='FONT-SIZE: 10.5pt'>");

document.write(bsWeek+"</span><br>"+"<br></b><font color=#9B4E00>");

document.write(bsYear+"<br>"+bsYear2+"</td></tr></table>");

}

//-->

interface

uses sysutils;

type TCNDate = Cardinal;

function DecodeGregToCNDate(dtGreg:TDateTime):TCNDate;

function GetGregDateFromCN(cnYear,cnMonth,cnDay:word;bLeap:Boolean=False):

TDateTime;

function GregDateToCNStr(dtGreg:TDateTime):String;

function isCNLeap(cnDate:TCNDate):boolean;

implementation

const cstDateOrg:Integer=32900; //公历1990-01-27的TDateTime表示 对应农历19

90-01-01

const cstCNYearOrg=1990;

const cstCNTable:array[cstCNYearOrg..cstCNYearOrg + 60] of WORD=( //

unsigned 16-bit

24402, 3730, 3366, 13614, 2647, 35542, 858, 1749, //1997

23401, 1865, 1683, 19099, 1323, 2651, 10926, 1386, //2005

32213, 2980, 2889, 23891, 2709, 1325, 17757, 2741, //2013

39850, 1490, 3493, 61098, 3402, 3221, 19102, 1366, //2021

2773, 10970, 1746, 26469, 1829, 1611, 22103, 3243, //2029

1370, 13678, 2902, 48978, 2898, 2853, 60715, 2635, //2037

1195, 21179, 1453, 2922, 11690, 3474, 32421, 3365, //2045

2645, 55901, 1206, 1461, 14038);

//2050

//建表方法：

// 0101 111101010010 高四位是闰月位置,后12位表示大小月,大月30天,小月29

天,

//闰月一般算小月,但是有三个特例2017/06,2036/06,2047/05

//对于特例则高四位的闰月位置表示法中的最高为设置为1 特殊处理用wLeapNormal变

量

// //2017/06 28330->61098 2036/06 27947->60715 2047/05 23133->55901

//如果希望用汇编,这里有一条信息:农历不会滞后公历2个月.

//将公历转换为农历

//返回:12位年份+4位月份+5位日期

function DecodeGregToCNDate(dtGreg:TDateTime):TCNDate;

var

iDayLeave:Integer;

wYear,wMonth,wDay:WORD;

i,j:integer;

wBigSmallDist,wLeap,wCount,wLeapShift:WORD;

label OK;

begin

result := 0;

iDayLeave := Trunc(dtGreg) - cstDateOrg;

DecodeDate(IncMonth(dtGreg,-1),wYear,wMonth,wDay);

if (iDayLeave < 0) or (iDayLeave > 22295 )then Exit;

//Raise Exception.Create('目前只能算1990-01-27以后的');

//Raise Exception.Create('目前只能算2051-02-11以前的');

for i:=Low(cstCNTable) to High(cstCNTable) do begin

wBigSmallDist := cstCNTable[i];

wLeap := wBigSmallDist shr 12;

if wLeap > 12 then begin

wLeap := wLeap and 7;

wLeapShift := 1;

end else

wLeapShift := 0;

for j:=1 to 12 do begin

wCount:=(wBigSmallDist and 1) + 29;

if j=wLeap then wCount := wCount - wLeapShift;

if iDayLeave < wCount then begin

Result := (i shl 9) + (j shl 5) + iDayLeave + 1;

Exit;

end;

iDayLeave := iDayLeave - wCount;

if j=wLeap then begin

wCount:=29 + wLeapShift;

if iDayLeave < wCount then begin

Result := (i shl 9) + (j shl 5) + iDayLeave + 1 + (1 shl

21);

Exit;

end;

iDayLeave := iDayLeave - wCount;

end;

wBigSmallDist := wBigSmallDist shr 1;

end;

end;

//返回值:

// 1位闰月标志 + 12位年份+4位月份+5位日期 (共22位)

end;

function isCNLeap(cnDate:TCNDate):boolean;

begin

result := (cnDate and $200000) <> 0;

end;

function GetGregDateFromCN(cnYear,cnMonth,cnDay:word;bLeap:Boolean=False):

TDateTime;

var

i,j:integer;

DayCount:integer;

wBigSmallDist,wLeap,wLeapShift:WORD;

begin

// 0101 010010101111 高四位是闰月位置,后12位表示大小月,大月30天,小月

29天,

DayCount := 0;

if (cnYear < 1990) or (cnYear >2050) then begin

Result := 0;

Exit;

end;

for i:= cstCNYearOrg to cnYear-1 do begin

wBigSmallDist := cstCNTable[i];

if (wBIgSmallDist and $F000) <> 0 then DayCount := DayCount + 29;

DayCount := DayCount + 12 * 29;

for j:= 1 to 12 do begin

DayCount := DayCount + wBigSmallDist and 1;

wBigSmallDist := wBigSmallDist shr 1;

end;

end;

wBigSmallDist := cstCNTable[cnYear];

wLeap := wBigSmallDist shr 12;

if wLeap > 12 then begin

wLeap := wLeap and 7;

wLeapShift := 1; //大月在闰月.

end else

wLeapShift := 0;

for j:= 1 to cnMonth-1 do begin

DayCount:=DayCount + (wBigSmallDist and 1) + 29;

if j=wLeap then DayCount := DayCount + 29;

wBigSmallDist := wBigSmallDist shr 1;

end;

if bLeap and (cnMonth = wLeap) then //是要闰月的吗?

DayCount := DayCount + 30 - wLeapShift;

result := cstDateOrg + DayCount + cnDay - 1;

end;

//将日期显示成农历字符串.

function GregDateToCNStr(dtGreg:TDateTime):String;

const hzNumber:array[0..10] of string=('零','一','二','三','四','五','六',

'七','八','九','十');

function ConvertYMD(Number:Word;YMD:Word):string;

var

wTmp:word;

begin

result := '';

if YMD = 1 then begin //年份

while Number > 0 do begin

result := hzNumber[Number Mod 10] + result;

Number := Number DIV 10;

end;

Exit;

end;

if Number<=10 then begin //可只用1位

if YMD = 2 then //月份

result := hzNumber[Number]

else //天

result := '初' + hzNumber[Number];

Exit;

end;

wTmp := Number Mod 10; //个位

if wTmp <> 0 then result := hzNumber[wTmp];

wTmp := Number Div 10; //十位

result:='十'+result;

if wTmp > 1 then result := hzNumber[wTmp] + result;

end;

var

cnYear,cnMonth,cnDay:word;

cnDate:TCNDate;

strLeap:string;

begin

cnDate:= DecodeGregToCNDate(dtGreg);

if cnDate = 0 then begin

result := '输入越界';

Exit;

end;

cnDay := cnDate and $1F;

cnMonth := (cnDate shr 5) and $F;

cnYear := (cnDate shr 9) and $FFF;

//测试第22位,为1表示闰月

if isCNLeap(cnDate) then strLeap:='(闰)' else strLeap := '';

result := '农历' + ConvertYMD(cnYear,1) + '年' + ConvertYMD(cnMonth,2) +

'月'

+ strLeap + ConvertYMD(cnDay,3) ;

end;

end.