Merge branch 'merge_upstream'

CMakeLists.txt

@@ -58,6 +58,7 @@ add_subdirectory(others)
 add_subdirectory(search)
 add_subdirectory(strings)
 add_subdirectory(sorting)
+add_subdirectory(geometry)
 add_subdirectory(probability)
 add_subdirectory(machine_learning)
 add_subdirectory(computer_oriented_statistical_methods)

geometry/CMakeLists.txt

@@ -0,0 +1,18 @@
+# If necessary, use the RELATIVE flag, otherwise each source file may be listed
+# with full pathname. RELATIVE may makes it easier to extract an executable name
+# automatically.
+file( GLOB APP_SOURCES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp )
+# file( GLOB APP_SOURCES ${CMAKE_SOURCE_DIR}/*.c )
+# AUX_SOURCE_DIRECTORY(${CMAKE_CURRENT_SOURCE_DIR} APP_SOURCES)
+foreach( testsourcefile ${APP_SOURCES} )
+    # I used a simple string replace, to cut off .cpp.
+    string( REPLACE ".cpp" "" testname ${testsourcefile} )
+    add_executable( ${testname} ${testsourcefile} )
+
+    set_target_properties(${testname} PROPERTIES LINKER_LANGUAGE CXX)
+    if(OpenMP_CXX_FOUND)
+        target_link_libraries(${testname} OpenMP::OpenMP_CXX)
+    endif()
+    install(TARGETS ${testname} DESTINATION "bin/geometry")
+
+endforeach( testsourcefile ${APP_SOURCES} )

geometry/line_segment_intersection.cpp

@@ -3,6 +3,7 @@
  * @brief check whether two line segments intersect each other
  * or not.
  */
+#include <algorithm>
 #include <iostream>
 
 /**