初始化指向数组的指针

Question

我试图在我的类构造函数中初始化指向struct数组的指针,但它根本不起作用...

class Particles {

private:

    struct Particle {
        double x, y, z, vx, vy, vz;
    };

    Particle * parts[];

public:

    Particles (int count)
    {
        parts = new Particle [count]; // < here is problem
    }

};

Answer 1

[]从声明中删除它们.它应该是

Particle *parts;

使用C++,您可以使用以下优点std::vector:

class Particles {
  // ...

 std::vector<Particle> parts;

 public:

    Particles (int count) : parts(count)
    {

    }
};