Re: 2Questions:The double semicolon and right way to store classes

1) I know that when I create a class I can access its instance methods
(functions) through the sintax
classname.method(parameters);
so I'm asking you: what does the std::cout means.. what is this sintax
telling about the relation between the "std" and the "cout" ? I hope I
explained my self..

2) I'd like to create a class with its methods and private data.. I
see that most of the time the methods are specified in a cpp file
while the "class interface" (I'm probably thinking in a java way) that
specifies which methods are included and if they're private or public,
is included in a header file: for istance:

// FILE MyClass.h
class MyClass{
  private:
      method1();
      int [] ...;
  public:
      MyClass();
      MyClass(....);
      method2()
};

// FILE MyClass.cpp
MyClass::MyClass(){
  ...
}
.....

then I can make a main in a third file and tells the compiler to
include the two file MyClass.cpp and MyClass.h ?? Is this the right
way to work out things?