Can't identify initialization type

I came across this code, and realized that I can not recall the type of initialization used, nor its supposed behavior.
Point p=(3,2);only seems to pass the latter value (2 in this case) as an argument to the constructor, so that the PrintOut shows something like x=2 y=5 as opposed to the expected x=3 y=2

class Point{
public:
    Point(int x=5,int y=5):a(x),b(y){};
    void printOut()const{
        cout<<"x= "<<a<<"y= "<<b<<endl;}
private:
     int a,b;
};

void main(){
    Point p=(3,2);
}