C 中的交叉引用结构 [英] Cross referencing structs in C

问题描述

有没有办法创建两个相互引用的结构?示例:

Is there a way to create two structs that make a reference to each other? Example:

struct str1
{
  struct str1* ptr1;
  struct str2* ptr2;
}

struct str2
{
  struct str1* ptr1;
  struct str2* ptr2;
}

推荐答案

struct str2; // put a forward reference to str2 here

struct str1
{
  struct str1* s1;
  struct str2* s2;
};

struct str2
{
  struct str1* s1;
  struct str2* s2;
};

int main()
{
  struct str1 s1;
  struct str2 s2;

  s1.s1 = &s1;
  s1.s2 = &s2;
  s2.s1 = &s1;
  s2.s2 = &s2;

  return 0;
}

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