1 files changed, 8 insertions, 1 deletions

diff --git a/src/calendar.h b/src/calendar.h
index ef785c0..810fa0c 100644
--- a/src/calendar.h
+++ b/src/calendar.h
@@ -9,6 +9,10 @@
 #include <vector>
 using namespace std;
 
+// 哈尔滨南岗地方经纬度
+#define LONGITUDE 126.68 * M_PI / 180
+#define LATITUDE 45.75 * M_PI / 180
+
 extern double delta;
 extern char jieqi[25][10];
 
@@ -90,6 +94,9 @@ class parameter {
     pair<double, double> sun_longitude(double t);
 
     double moon_longitude(double t);
+
+    double getHourAngle(double julianKiloTime, double longitude,
+                        double latitude, double alpha);
 };
 
-#endif
+#endif
\ No newline at end of file