Subtracting Julians returns a Timespan. Added GetTotalSeconds to Timespan

Julian.cpp

@@ -154,6 +154,12 @@ Julian Julian::operator-(const Timespan& b) const {
     return result;
 }
 
+Timespan Julian::operator-(const Julian& b) const {
+
+    Timespan result(date_ - b.date_);
+    return result;
+}
+
 std::ostream & operator<<(std::ostream& stream, const Julian& julian) {
 
     std::stringstream out;

Julian.h

@@ -33,6 +33,8 @@ public:
     Julian operator+(const Timespan& b) const;
     Julian operator-(const Timespan& b) const;
 
+    Timespan operator-(const Julian& b) const;
+
     friend std::ostream & operator<<(std::ostream& stream, const Julian& julian);
 
     struct DateTimeComponents {

Timespan.cpp

@@ -32,6 +32,10 @@ double Timespan::GetTotalMinutes() const {
     return time_span_ * kMINUTES_PER_DAY;
 }
 
+double Timespan::GetTotalSeconds() const {
+    return time_span_ * kSECONDS_PER_DAY;
+}
+
 Timespan& Timespan::operator =(const Timespan& b) {
 
     if (this != &b) {

Timespan.h

@@ -11,6 +11,7 @@ public:
     double GetTotalDays() const;
     double GetTotalHours() const;
     double GetTotalMinutes() const;
+    double GetTotalSeconds() const;
 
     /*
      * overloaded operators