C编程：取消引用指针不完全类型错误 [英] C programming: Dereferencing pointer to incomplete type error

问题描述

我有一个结构定义为：

struct {
 char name[32];
 int  size;
 int  start;
 int  popularity;
} stasher_file;

和指针数组这些结构：

struct stasher_file *files[TOTAL_STORAGE_SIZE];

在我的code，我正在做一个指向结构并设置其成员，并将其添加到数组：

In my code, I'm making a pointer to the struct and setting its members, and adding it to the array:

 ...
 struct stasher_file *newFile;
 strncpy(newFile->name, name, 32);
 newFile->size = size;
 newFile->start = first_free;
 newFile->popularity = 0;
 files[num_files] = newFile;
 ...

我收到一个错误：提领指向不完全类型每当我尝试访问内部 NEWFILE 成员。我在做什么错了？

I'm getting an "error: dereferencing pointer to incomplete type" whenever I try to access the members inside newFile. What am I doing wrong?

推荐答案

您还没有通过你的第一个定义来定义结构stasher_file 。你所定义的是一个的无名的结构类型和类型的变量 stasher_file 。既然在你的code为这种类型定义为结构stasher_file ，编译器会抱怨不完全型。

You haven't defined struct stasher_file by your first definition. What you have defined is an nameless struct type and a variable stasher_file of that type. Since there's no definition for such type as struct stasher_file in your code, the compiler complains about incomplete type.

为了定义结构stasher_file ，你应该做如下它

In order to define struct stasher_file, you should have done it as follows

struct stasher_file {
 char name[32];
 int  size;
 int  start;
 int  popularity;
};

请注意其中 stasher_file 的名字被放置在定义。

Note where the stasher_file name is placed in the definition.

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