将主体中的定义类型传递给C中的标题 [英] Passing defined type in main to header in C

问题描述

所以，正如标题所说，我应该在主文件中定义一个类型，并以某种方式将它传递给标题。我试图以任何方式做到这一点，但我没有想法。

我这样定义它：typedef int DATA;并在header中用作数据类型。

我试图在包含头文件之前插入typedef，但仍未识别。

任何想法？或者甚至不可能这样做？

  #include< stdio.h> 
 #include< stdlib.h> 
 
 typedef int DATA; 
 
 #includePriorityQueue.h
 
 int main（）{
 int priority; 
 DATA值; 
  

这是我的主要开始

  #ifndef PRIORITY_QUEUE_H_ 
 #define PRIORITY_QUEUE_H_ 
 
 struct priorityQueue {
 int priority; 
 DATA值; 
 struct priorityQueue * next; 
}; 
 typedef struct priorityQueue LINK; 
 
 void createEmpty（LINK ** head）; 
 void add（LINK ** head，int p，DATA v）; 
 void deleteElement（LINK ** head，int * p，DATA * v）; 
 // void print（LINK * head）; 
 void checkIfEmpty（LINK * head）; 
 void destroy（LINK * head）; 
 #endif 
  

标题

<$编译：在PriorityQueue中发布（编译器：GNU GCC编译器）=== |
〜\PriorityQueue\PriorityQueue.h | 6 |错误：未知类型名称'DATA'|
〜\PriorityQueue\PriorityQueue.h | 11 |错误：未知类型名称'DATA'|
〜\PriorityQueue\PriorityQueue.h | 12 |错误：未知类型名称'DATA'|
〜\PriorityQueue\PriorityQueue.c | 10 |错误：未知类型名称'DATA'|
〜\PriorityQueue\PriorityQueue.c | 44 |错误：未知类型名称'DATA'|
|| ===构建失败：5个错误，0个警告（0分钟，0秒）=== |
用来代替我的目的地

解决方案

Put typedef int DATA; 在PriorityQueue.h中 struct priorityQueue 之前，并确保PriorityQueue.h包含在PriorityQueue.c中。

So, as the title says, I am supposed to define a type in main file and, somehow, pass it to header. I tried to do that in any way, but I am out of ideas.

I define it like this: "typedef int DATA;" and use it in header as a data type.

I tried inserting typedef before including header but still it isnt recognised.

Any ideas? Or it is not even possible to do it in this way?

#include <stdio.h>
#include <stdlib.h>

typedef int DATA;

#include "PriorityQueue.h"

int main(){
    int priority;
    DATA value;

That's beginning of my main

#ifndef PRIORITY_QUEUE_H_
#define PRIORITY_QUEUE_H_

struct priorityQueue{
    int priority;
    DATA value;
    struct priorityQueue *next;
};
typedef struct priorityQueue LINK;

void createEmpty(LINK **head);
void add(LINK **head, int p, DATA v);
void deleteElement(LINK **head, int *p, DATA *v);
//void print(LINK *head);
void checkIfEmpty(LINK *head);
void destroy(LINK *head);
#endif

Header

||=== Build: Release in PriorityQueue (compiler: GNU GCC Compiler) ===|
~\PriorityQueue\PriorityQueue.h|6|error: unknown type name 'DATA'|
~\PriorityQueue\PriorityQueue.h|11|error: unknown type name 'DATA'| 
~\PriorityQueue\PriorityQueue.h|12|error: unknown type name 'DATA'| 
~\PriorityQueue\PriorityQueue.c|10|error: unknown type name 'DATA'| 
~\PriorityQueue\PriorityQueue.c|44|error: unknown type name 'DATA'| 
||=== Build failed: 5 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
 Used ~ instead of my destination

解决方案

Put typedef int DATA; in PriorityQueue.h before struct priorityQueue, and make sure PriorityQueue.h is included in PriorityQueue.c.

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