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--- wiki2:cpp:notes [2015/07/29 14:59]
alfred creado
+++ wiki2:cpp:notes [2020/05/09 09:25] (actual)
@@ Línea 1: / Línea 1: @@
 ====== C++ Notes ======
+===== Notes about the language =====
+  * **C++11** is the ISO C++ standard ratified in 2011. The previous standard is often referred to as C++98 or C++03; the differences between C++98 and C++03 are so few and so technical that they ought not concern users. C++14 is the informal name for a recent revision of the C++ standard. It is intended to be a small extension over C++11, featuring mainly bug fixes and small improvements.
+  * **Differences between a class and a struct** in C++ are that structs have default public members and bases and classes have default private members and bases. Both classes and structs can have a mixture of public and private members, can use inheritance, and can have member functions. Classes create a namespace that also encapsulate the functions for manipulating its data elements. Classes may not be used when interfacing with C, because C does not have a concept of classes.
+==== Maps ====
+  * {{:wiki2:cpp:maps.pdf|Maps}}
 ===== Libraries =====
 ==== Use ====
-Lets consider your /usr/local/lib/libYARP_OS.a. What you can do is, have
+Lets consider your ''/usr/local/lib/libYARP_OS.a''. What you can do is, have ''-L/usr/local/lib/'' in your makefile as one of the variables. And then you can have ''-lYARP_SO'' appended to the LDLIBS.
+-L is for path to the lib and -l is the lib name here ''libYARP_OS''.a will be passed as ''-lYARP_OS''. On command line you would do something like: ''gcc -o main main.c -L/usr/local/lib/ -lYARP_SO''. This should give you an idea.
+===== C++11 =====
+==== Auto ====
+<code cpp>
+ofRectangle rectangle = ofGetCurrentViewport();
+//is the same as
+auto rectangle = ofGetCurrentViewport();
+//and
+const ofRectangle rectangle = ofGetCurrentViewport();
+//is the same as
+const auto rectangle = ofGetCurrentViewport();
+float x = rectangle.x;
+//is the same as
+auto x = rectangle.x;
+//and
+float & x = rectangle.x;
+//is the same as
+auto & x = rectangle.x;
+</code>
+==== Foreach ====
+<code cpp>
+for (auto mySelfie : mySelfies) { ... }
+// To use a reference rather than a copy
+for(auto & mySelfie : mySelfies) { ... }
+</code>
--L/usr/local/lib/ in your makefile as one of the variables. And then you can have -lYARP_SO appended to the LDLIBS.
+==== Override ====
+This does not produces an error:
+<code cpp>
+class BuildingProjectionMapper {
+public:
+//...
+    virtual void mapTheGreekColumns();
+//...
+};
--L is for path to the lib and -l is the lib name here libYARP_OS.a will be passed as -lYARP_OS
+class AutoBuildingProjectionMapper : public BuildingProjectionMapper {
+public:
+	void mapTheGreekColums(); // woops, I spelt column incorrectly
+};
+</code>
+To solve this:
+<code cpp>
+class AutoBuildingProjectionMapper : public BuildingProjectionMapper {
+public:
+	void mapTheGreekColums() override;
+};
+</code>
-On command line you would do something like: gcc -o main main.c -L/usr/local/lib/ -lYARP_SO. This should give you an idea.
+===== Tips =====
+  * Do not use ''this'' inside of a constructor.

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