some changes ; mostly new examples

OOP/methodes/class_methode_outside.cpp

@@ -0,0 +1,23 @@
+#include <iostream>
+
+/*
+    Here we have a Class which has a Function that is declared outside of the Class itself ; 
+    We just reference the Function inside the class and later outside create a Function with this structure:
+        class::function()
+*/
+
+using namespace std;
+
+class outside {
+    public:
+        void coolFunc();
+};
+
+void outside::coolFunc() {
+    cout << "I am a cool Outside Function\n";
+};
+
+int main() {
+    outside classobj;
+    classobj.coolFunc(); // No cout needed here for some reason ; idk why
+}