// SoloLearn Practice - 02-How to create classes // Edited and Created by Robin Rademaker - 23/03/2019 #include using namespace std; /* When using classes inside same file it is written like this // No header or source file are used here // creation of the class // function declarations (prototypes) and variable declarations /***********************classes*******************************/ class MyClass{ public: MyClass(); // define the constructor void myPrint(); // define function void myPrintC() const; // define function for constant ~MyClass(); // define the destructor (not mandatory) // don't need one? No need to define one) }; // implementation of the class and its methods // To define member function of a class at outside the class we use :: // Syntax: return-typeOfFunction nameOfClass::nameOfFunction MyClass::MyClass(){ // >> constructor is called cout<<"[1] Constructor is called"<1){ cout <<" again"<> object is deleted after this MyClass::~MyClass(){ // >> destructor is called cout<<"[4] Destructor is called"< ptr->myPrint(); // Interesting to see is that ONLY MyClass::myPrint() is called // When you remove comment before const MyClass objC the CONSTRUCTOR and DESTRUCTOR // will be called again! // When can make class objects CONSTANT, but then it needs it's own // All const variables must be initialized when they're created. // In the case of classes, this initialization is done in the constructor // const MyClass objC; objC.myPrintC(); } /******************end**main**********************************/

Cpp - 02-How to use classes