Formalized this program.

- Make src dir, put all code into it.
- Devide old source code into several parts of files with makefile.
- Delete some useless files.

1 files changed, 89 insertions, 0 deletions

diff --git a/src/Julian.cpp b/src/Julian.cpp
new file mode 100644
index 0000000..1d3c4b7
--- /dev/null
+++ b/src/Julian.cpp
@@ -0,0 +1,89 @@
+#include "calendar.h"
+
+double Julian::d[23][5]={
+    {-4000,  108371.700000,  -13036.800000,  392.000000,   0.000000},
+    { -500,   17201.000000,    -627.820000,   16.170000,  -0.341300},
+    { -150,   12200.600000,    -346.410000,    5.403000,  -0.159300},
+    {  150,    9113.800000,    -328.130000,   -1.647000,   0.037700},
+    {  500,    5707.500000,    -391.410000,    0.915000,   0.314500},
+    {  900,    2203.400000,    -283.450000,   13.034000,  -0.177800},
+    { 1300,     490.100000,     -57.350000,    2.085000,  -0.007200},
+    { 1600,     120.000000,      -9.810000,   -1.532000,   0.140300},
+    { 1700,      10.200000,      -0.910000,    0.510000,  -0.037000},
+    { 1800,      13.400000,      -0.720000,    0.202000,  -0.019300},
+    { 1830,       7.800000,      -1.810000,    0.416000,  -0.024700},
+    { 1860,       8.300000,      -0.130000,   -0.406000,   0.029200},
+    { 1880,      -5.400000,       0.320000,   -0.183000,   0.017300},
+    { 1900,      -2.300000,       2.060000,    0.169000,  -0.013500},
+    { 1920,      21.200000,       1.690000,   -0.304000,   0.016700},
+    { 1940,      24.200000,       1.220000,   -0.064000,   0.003100},
+    { 1960,      33.200000,       0.510000,    0.231000,  -0.010900},
+    { 1980,      51.000000,       1.290000,   -0.026000,   0.003200},
+    { 2000,      63.870000,       0.100000,    0.000000,   0.000000},
+    { 2005,      64.700000,       0.210000,    0.000000,   0.000000},
+    { 2012,      66.800000,       0.220000,    0.000000,   0.000000},
+    { 2018,      69.000000,       0.360000,    0.000000,   0.000000},
+    { 2028,      72.600000,       0.000000,    0.000000,   0.000000}
+};
+
+double Julian::dt_ext(int y,double jsd)
+{
+    double dy=(double)(y-1820)/100.0;
+    return -20+jsd*dy*dy;
+}
+
+//计算力学时与世界时之差,传入年份
+double Julian::delta_t(int y)
+{
+    int y0=d[22][0];//表中最后一行的年份
+    double t0=d[22][1];//表中最后一行的delta_t
+    double jsd;
+
+    if(y>y0)
+    {
+        jsd=31;
+        if(y-y0>100)
+        {
+            return dt_ext(y,jsd);
+        }
+
+        double v=dt_ext(y,jsd);
+        double dv=dt_ext(y0,jsd)-t0;
+        return v-dv*(y0+100-y)/100;
+    }
+
+    double res;
+    for(int i=0;i<22;i++)
+    {
+        if(y<d[i+1][0])
+        {
+            break;
+        }
+        double t1=(y-d[i][0])/(d[i+1][0]-d[i][0])*10;
+        double t2=t1*t1;
+        double t3=t2*t1;
+        res=d[i][1]+d[i][2]*t1+d[i][3]*t2+d[i][4]*t3;
+    }
+    return res;
+}
+// 计算儒略日
+double Julian::getJulianDay(time_t time)
+{
+    double t=(double)time;
+    return (double)t/86400.0+2440587.5;
+}
+
+// 计算儒略千年数
+double Julian::getJulianKiloYear(time_t time)
+{
+    double jd = getJulianDay(time);
+    return (double)(jd-2451545.0)/365250.0;
+}
+
+//儒略千年数转时间戳
+time_t Julian::kiloYearToTime(double t,int year)
+{
+    double jd=t*365250.0+2451545.0;
+    time_t time=(time_t)((jd-2440587.5)*86400.0-delta_t(year));
+    return time;
+}