Recall a struct with a function:

struct Point {
    int x; // member variables
    int y;
    void adjust( int x_, int y_ ) // member function
    {
        x += x_;
        y += y_;
    }
};

void main()
{
    Point p;          // instantiate object
    p.x = p.y = 4;    // access member variables
    p.adjust( 1, 1 ); // call member function
}