在typedef结构中定义struct [英] Defining struct within typedef struct

问题描述

typedef struct leaf{
  int value;
  struct leaf* lchild;
  struct leaf* rchild;
} LEAF;

例如上面的一个定义结构 leaf 并使该类型的2个成员：lchild，rchild。这是一个递归？

For example the one above defines structure leaf and makes 2 members of that type: lchild, rchild. So is this like a recursion?

推荐答案

你的假设是错误的。 leaf 有2个类型 leaf * 的成员，而不是 leaf 。所以它不是（数据）递归。

Your assumption is wrong. leaf has 2 members of type leaf*, not leaf. So it's not (data) recursion.

和以下

struct leaf
{
    leaf x;
};

在C ++中是非法的。注意，在C ++中，当你声明该类型的变量的成员时，你不需要 struct leaf ，你也不需要 typedef 。

would be illegal in C++. Note that in C++ you don't need struct leaf when you declare a member of variable of that type, nor do you need the typedef.

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