Print out string value for Julian

Julian.cpp

@@ -5,6 +5,8 @@
 #include <ctime>
 #include <cassert>
 #include <cstring>
+#include <sstream>
+#include <iomanip>
 
 #ifdef WIN32
 #include <windows.h>
@@ -139,6 +141,21 @@ Julian Julian::operator-(const Timespan& b) const {
     return result;
 }
 
+std::ostream& operator<< (std::ostream& stream, const Julian& julian) {
+    std::stringstream out;
+    struct Julian::DateTimeComponents datetime;
+    julian.GetDateTime(&datetime);
+    out << std::right << std::fixed << std::setprecision(3) << std::setfill('0');
+    out << std::setw(4) << datetime.years << "-";
+    out << std::setw(2) << datetime.months << "-";
+    out << std::setw(2) << datetime.days << " ";
+    out << std::setw(2) << datetime.hours << ":";
+    out << std::setw(2) << datetime.minutes << ":";
+    out << std::setw(6) << datetime.seconds;
+    stream << out.str();
+    return stream;
+}
+
 /*
  * create julian date from year and day of year
  */

Julian.h

@@ -5,6 +5,7 @@
 #include "Timespan.h"
 
 #include <ctime>
+#include <iostream>
 
 class Julian {
 public:
@@ -14,6 +15,9 @@ public:
     Julian(int year, double day);
     Julian(int year, int mon, int day, int hour, int min, double sec);
 
+    ~Julian() {
+    };
+
     /*
      * comparison operators
      */
@@ -29,8 +33,7 @@ public:
     Julian operator+(const Timespan& b) const;
     Julian operator-(const Timespan& b) const;
 
-    ~Julian() {
-    };
+    friend std::ostream & operator<<(std::ostream& stream, const Julian& julian);
 
     struct DateTimeComponents {
         int years;

SatTrack.cpp

@@ -17,6 +17,7 @@ int main() {
     sgp4.FindPosition(&eci, now);
     CoordTopographic topo = obs.GetLookAngle(eci);
     CoordGeodetic geo = eci.ToGeodetic();
+    std::cout << now << " ";
     std::cout << topo << " ";
     std::cout << geo << std::endl;
   };