结构数组动态分配 [英] array of structures dynamic allocation

问题描述

大家好，

有人请向我解释如何动态分配和结构数组

例如这个结构

  typedef   struct  
 {
  float  angle;  //  当前伺服角度 
  unsigned  int16 width_count; 
 
  float  min_angle;  //   min achieve vable angle  
  float  max_angle;  //  最大可实现角度 
 
 int16 min_uswidth; 
 int16 max_uswidth; 
} servo_motor; 
 
 servo_motor servo [ 4 ]; 

提前谢谢，

z3ngew

解决方案

这是 malloc ，请参阅：

http://www.cplusplus.com/forum/articles/416/ [ ^ ]。



请不要忘记免费。



为什么你的东西是你的分配应该是动态的吗？你没有可变数量的结构;在你的代码中，它是立即常量 4，顺便说一下，它总是很糟糕。你应该有明确的 const 。在这种情况下，您可以简单地声明数组，并且它将在堆栈上分配，直到您离开上层堆栈帧时才会被删除。

-SA

这里： 7.2将数组传递给函数 [ ^ ]你会找到一个例子

我在这里找到了一个很好的答案

http://cboard.cprogramming.com/cplusplus-programming/80630-passing-struct- function-reference.html [ ^ ]

Hello everyone,
will someone please explain to me how to dynamically allocate and array of structures
for example this structure

typedef struct
{
   float angle;   //current servo angle
   unsigned int16 width_count;

   float min_angle;  //min achievable angle
   float max_angle;  //max achievable angle

   int16 min_uswidth;
   int16 max_uswidth;
}servo_motor;

servo_motor servo[4];

thanks in advance,
z3ngew

解决方案

It's malloc, please see:
http://www.cplusplus.com/forum/articles/416/[^].

Please don't forget free.

Why do you thing your allocation should be dynamic? You don't have variable number of structures; in your code, it's the immediate constant 4, which is, by the way, always bad. You should have explicit const. In this case, you can simply declare the array, and it will be allocated on stack and not removed until you leave for a upper-level stack frame.

—SA

Here: 7.2 Passing Arrays to Functions[^] you'll find an example

i found a good answer here
http://cboard.cprogramming.com/cplusplus-programming/80630-passing-struct-function-reference.html[^]

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