无法分配指向结构的指针数组 [英] Failed to allocate an array of pointers to a struct

问题描述

这是我的结构：

  struct Brick {
 GameObject2D * handle_; 
}; 
 
 Brick ** bricks_; 
  

这是我试图为它分配内存：

  int bricks_amount_ = 10; 
 
 bricks_ =（Brick **）malloc（sizeof（Brick *）* bricks_amount_）; 
  

程序崩溃。我对它做了一个devenv来调试这里的问题，它崩溃：

  for（unsigned short int i = 0; i  bricks_ [i]  - > handle_ = new GameObject2D（）; < ---------- CRASH！ 
} 
  

有任何建议吗？

PS：对不起我的英语：P

================== ==================================================== =====

[解决方案]

最后，我决定使用std :: vector原始指针：

  bricks_.resize（bricks_amount_）; 
  

但我试图使malloc不同的方式，它的工作原理：

  bricks_ =（struct Brick *）malloc（sizeof（struct Brick）* bricks_amount_）; 
  

或：

  bricks_ = new Brick [bricks_amount_]; 
  

感谢希望帮助的人们！

解决方案

这是C ++：

• 不要使用 malloc ，使用 new


• 不使用平面数组，使用 std： ：vector 或 std :: array


• 不使用原始指针，使用 std :: unique_ptr

I'm trying to allocate an array of pointers to a struct but there's something wrong with my code.

This is my struct:

struct Brick {
  GameObject2D* handle_;
};

Brick** bricks_;

And this is how i'm trying to allocate memory for it:

int bricks_amount_ = 10;    

bricks_ = (Brick**)malloc(sizeof(Brick*) * bricks_amount_);

The program crash. I've make a devenv on it to debug where's the problem and it crash on this line:

for (unsigned short int i = 0; i < bricks_amount_; i++){
  bricks_[i]->handle_ = new GameObject2D(); <---------- CRASH!
}

Any suggestions?

PS: Sorry for my english :P

=========================================================================

[SOLUTION]

Finally i've decided to use std::vector instead raw pointers:

bricks_.resize(bricks_amount_);

but i've tried to make the malloc different way and it works too:

bricks_ = (struct Brick*)malloc(sizeof(struct Brick) * bricks_amount_);

or this:

bricks_ = new Brick[bricks_amount_];

Thank you to the people who wants to help!

解决方案

It's C++:

• don't use malloc, use new
• don't use plain arrays, use std::vector or std::array
• don't use raw pointers, use std::unique_ptr

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