Classes and variables scope in C++

Question

class car {
    int speed; 
    double position;

    public:
       car(int v,double d);
       int getspeed();
};

int car::getspeed() {
return speed;
}

car::car(         


        

Answer 1

This constructor doesn't work

car::car(int speed, double position){
   speed=speed;
   position=position;
}

because it assigns the parameters to themselves.

This version does work because of the slightly odd scoping rules of a class

car::car(int speed, double position) : speed(speed), position(position)
{  }