Thread: C++ Classes

Hi everyone, I am studing on classes and I found an example that I cannot figure out how it works

Code:

class Distance{
private:
        int feet;
        int inch;
public:
             Distance (); //Constructor
        void getDist  ();
        void showDist ();
        Distance addDist( Distance d2 );
        Distance subDist( Distance d2 );
 };

and this is the definition

Code:

Distance Distance:: addDist( Distance d2 )
{
    Distance temp;
 
    temp.feet = feet + d2.feet;
    temp.inch = inch + d2.inch;
 
    if( temp.inch >= 12)
    {
        temp.feet++;
        temp.inch -= 12;        
    }
    return temp;    
}

I cannot understand this line inside the class: Distance addDist( Distance d2 );

It creates an object "addDist" passing as parameter an other object "d2"?

Also I don't understand the syntax of this line: Distance Distance:: addDist( Distance d2 )

Thanks in advance