C++ Tutorial/Class/public

Initialize the public data members in a class

<source lang="cpp">#include <iostream> using std::cout; using std::endl; class Box {

 public:
   double length;
   double width;
   double height;
   double volume() {
     return length * width * height;
   }

}; int main() {

 Box firstBox = { 80.0, 50.0, 40.0 };
 double firstBoxVolume = firstBox.volume();
 cout << firstBox.length
      << firstBox.width
      << firstBox.height
      << endl;
      
 cout << "Volume of first Box object is " << firstBoxVolume << endl;
 return 0;

}</source>

805040
Volume of first Box object is 160000

public fields and member functions

<source lang="cpp">#include <iostream> using namespace std; class MyClass { public:

 int number;
 void display(); 

}; void MyClass::display() {

 for(int i = 0; i<= number;i++)
 {
    cout<< "Hello World \n";
 }
 

} int main () {

      MyClass myfirstobject;
      myfirstobject.number =3; 
   myfirstobject.display();

      return 0;

}</source>

Hello World
Hello World
Hello World
Hello World