add collections

add pointers

CPlusPlus/Pointers/functions.cpp

@@ -0,0 +1,26 @@
+#include "functions.h"
+
+void changeInteger(int n)
+{
+	n *= 2;
+}
+
+int changeIntegerPerReturn(int n)
+{
+	return  n * 2;
+}
+
+bool changeIntegerPerPointer(int* pN)
+{
+	if (pN == nullptr) return false;
+
+	*pN *= 2;
+
+	return true;
+}
+
+bool changeIntegerPerReference(int& n)
+{
+	n *= 2;
+	return true;
+}