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libs/date_time/example/posix_time/time_math.cpp

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+/* Some simple examples of constructing and calculating with times
+ * Output:
+ * 2002-Feb-01 00:00:00 - 2002-Feb-01 05:04:02.001000000 = -5:04:02.001000000
+ */
+
+#include "boost/date_time/posix_time/posix_time.hpp"
+#include <iostream>
+
+int
+main() 
+{
+  using namespace boost::posix_time;
+  using namespace boost::gregorian;
+
+  date d(2002,Feb,1); //an arbitrary date
+  //construct a time by adding up some durations
+  ptime t1(d, hours(5)+minutes(4)+seconds(2)+milliseconds(1));
+  //construct a new time by subtracting some times
+  ptime t2 = t1 - hours(5)- minutes(4)- seconds(2)- milliseconds(1);
+  //construct a duration by taking the difference between times
+  time_duration td = t2 - t1;
+    
+  std::cout << to_simple_string(t2) << " - " 
+            << to_simple_string(t1) << " = "
+            << to_simple_string(td) << std::endl;
+  
+  return 0;
+}
+
+/*  Copyright 2001-2004: CrystalClear Software, Inc
+ *  http://www.crystalclearsoftware.com
+ *
+ *  Subject to the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ */
+