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c 经常声明
原标题:recurrent declare in c

类型无效(回顾)(第1页,第2页);

typedef struct _sStruct
{
callback *funct;
}sStruct;

我在C.中发表了以下声明:我如何能够在不出现任何错误的情况下汇编这一经常性声明?

此时此刻,我收到:syntax差错,后一行:

问题回答

您可以提前宣布结构:

/* Tell the compiler that there will be a struct called _sStruct */
struct _sStruct;

/* Use the full name "struct _sStruct" instead of the typedef ed name
   "sStruct", since the typedef hasn t occurred yet */
typedef void (callback)(int *p1, struct _sStruct *p2);

/* Now actually define and typedef the structure */
typedef struct _sStruct
{
  callback *funct;
} sStruct;

<><>Edit>: 为与问题相对应而更新的类型名称变更。

此外,我强烈建议,你不要给识别符号<>_sStruct上打脚。 始于_的全球名称为保留名称,而使用这些名称作为您自己的识别特征,可能会造成不明确的行为。





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