Jimmy_King

Edward is a worker for Aluminum Cyclic Machinery. His work is operating mechanical arms to cut out designed models. Here is a brief introduction of his work. Assume the operating plane as a two-dimen...

struct Vector { double x, y; Vector() {} Vector(double a, double b) { x = a; y = b; } Vector operator-(Vector a) { return Vector(x - a.x, y - a.y); } Vector(Vector b, Vector a) { x...