Cplusplussyntax.txt

Creating a class syntax:
class class_name {
  access_specifier_1:
    member1;
  access_specifier_2:
    member2;
  ...
} object_names;

// classes example
#include <iostream>
using namespace std;

class Rectangle {
    int width, height; //declare variable
  public:
    void set_values (int,int); //declare method
    int area() {return width*height;}
};

void Rectangle::set_values (int x, int y) {
  width = x;
  height = y;
} //define method outside of class

int main () {
  Rectangle rect; //create an object of a class
  rect.set_values (3,4); //call the method of the class.
  cout << "area: " << rect.area();
  return 0;
}

Pointer: point to a location in the memory not the value 
type * name; //declaring pointer

templated class
template <class A_Type> class calc
{
  public:
    A_Type multiply(A_Type x, A_Type y);
    A_Type add(A_Type x, A_Type y);
};
template <class A_Type> A_Type calc<A_Type>::multiply(A_Type x,A_Type y)
{
  return x*y;
}
template <class A_Type> A_Type calc<A_Type>::add(A_Type x, A_Type y)
{
  return x+y;
}

templated function:
template <class type> type func_name(type arg1, ...);

templated class with templated function:
template <class type> class TClass
{
    // constructors, etc
    
    template <class type2> type2 myFunc(type2 arg);
};
The function myFunc is a templated function inside of a templated class, and when you actually define the function, you must respect this by using the template keyword twice: 
template <class type>  // For the class
    template <class type2>  // For the function
    type2 TClass<type>::myFunc(type2 arg)
    {
        // code
    }