用C循环定义 [英] Circular definition in C

问题描述

我已经写的是：

typedef enum _MyStatus
{
    MY_STATUS_OK = 0,
    MY_STATUS_GENERAL_ERROR = -1,

} MyStatus;

typedef MyStatus (*MyCallback)(MySettings *settings);

typedef struct _MySettings
{
    MyCallback callback;
} MySettings

不过，它不会编译定义myCallBack函数，它不知道MySettings的时。如果我换MySettings和myCallBack函数，这将是倒过来：MySettings不知道myCallBack函数的

However, it wouldn't compile as when defining MyCallback it doesn't know of MySettings. If I swapped MySettings and MyCallback, it would be the other way round: MySettings wouldn't know of MyCallback.

如何一般这类问题用C处理的？

How generally is this sort of problem handled in C?

谢谢！

推荐答案

怎么样把这个线在顶部：

How about putting this line at the top:

typedef struct _MySettings MySettings;

这Ç常见问题：我如何定义一对相互引用的结构的可能？可以使用。

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