用Visual C++编写的模拟多台电梯智能运行的程序-imitate how an elevator works using Visual C++ language

有A，B，C三部电梯，某人在M层，按哪部电梯来接她，电梯所走层数最少？电梯算法-There are A, B, C three elevators, someone the M layer, according to which lifts to pick her up, take the elevator floors least? Elevator algorithm