ERROR取消引用指针在C型不完全 | ERROR取消引用指针在C型不完全

本文介绍了ERROR取消引用指针在C型不完全的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有这样的错误：提领指向不完全类型main_dict - >大小= 0;

意味着什么这个错误？我怎样才能解决这个问题？

dictionary.c

 结构_Dictionary_t {
  焦炭**字典;
  INT大小;
};字典dict_new（无效）{  字典dict_new = NULL;
  dict_new =释放calloc（1，sizeof的（结构_Dictionary_t））;
  断言（dict_new！= NULL）;
  dict_new  - ＆GT;字典= NULL;
  回报（dict_new）;
}

dictionary.h

  typedef结构_Dictionary_t *字典;字典dict_new（无效）;

的main.c

  INT主要（无效）{  int类型的;
  main_dict = dict_new（）;
  A = main_dict-＆GT;大小;
  如果（A == 0）{
      的printf（我会在这里，如果我修正错误。\\ n）
  }
  返回0;
}

解决方案

The forward declaration

typedef struct _Dictionary_t *Dictionary;

doesn't give a clue as to what members struct _Dictionary_t might have.

You cannot use main_dict->size unless the definition of struct is visible at that point in the code. Since the definition of the struct is in dictionary.c, its definition is not visible to anything in main.c.

Solution 1

Move the definition of the struct to the .h file.

Solution 2

Provide functions that allow you to get and set the members of the struct.

In dictionary.h:

void setDictionarySize(Dictionary dict, int size);
int getDictionarySize((Dictionary dict);

Implement them in dictioary.c.

Use the function in main.c. Replace

a = main_dict->size;

a = getDictionarySize(main_dict);

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