Question

我正在编写一个小型C程序，用于加载带有文件名的链接列表（仅限）。我将遍历此列表并解析每个文件名的内容。

编译时收到以下错误：

main.c: In function 'main':
main.c:25: error: dereferencing pointer to incomplete type
main.c:26: error: dereferencing pointer to incomplete type
make: *** [main.o] Error 1

main.c中：

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

#include "list.h"

int main(int argc, char *argv[])
{
    FNODEPTR node = NULL;

    node = create_filename_list();

    add_filename_node(&node, "file1.txt");
    add_filename_node(&node, "file2.txt");

    //Start Logger
    //Watchdog
    //Warehouse 

    //print_filename_list((struct sFilename *)node);

    while(node!=NULL)
    {
        printf("%s\n",node->chaFilename); //Line 25
        node=node->next; //Line 26
    }

    destroy_filename_list(node);

    exit(0); //0 SUCCESS - 1 FAIL
}

list.c：

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


#include "list.h"

struct sFilename
{
    char chaFilename[25];
    struct sFilename *next;
};

FNODEPTR create_filename_list()
{
    FNODEPTR node = NULL;

    node = (FNODEPTR) malloc(sizeof (struct sFilename)); // Alocando um nó do tipo sFilename

    return node;
}

void add_filename_node(FNODEPTR *fnFilename, char *chaFilename)
{
    FNODEPTR head = *fnFilename; // head recebe o conteúdo de anAction. head aponta para o mesmo endereço que fnFilename
    FNODEPTR newNode;

    newNode = (FNODEPTR) malloc(sizeof (struct sFilename)); // Alocando um nó do tipo sFilename

    strcpy(newNode->chaFilename, chaFilename); // Copiando o conteúdo de chaFilename para newNode->chaFilename.

    newNode->next = head; // next do novo nó aponta para o início da lista (fnFilename)

    head = newNode; //head é igual a newNode. head recebe o endereço de memória de newNode. head está na mesma posição que newNode
    *fnFilename = head; //o conteúdo de anAction é igual a posição de head
}

void print_filename_list(struct sFilename *fnFilename)
{
   if (fnFilename == NULL)
          printf("Nao ha arquivos ftp a serem carregados\n");
   else {
          printf("Os arquivos que serao carregados no T020 sao:\n");
          while (fnFilename != NULL) {
                 printf("\t- %s\n", fnFilename->chaFilename);//fnFilename->chaFilename);
                 fnFilename = (*fnFilename).next;//fnFilename->next;
          }
   }
}

void destroy_filename_list(FNODEPTR fnFilename)
{
    if(fnFilename != NULL)
    {
        free(fnFilename);
    }
}

list.h：

#ifndef LIST_H
#define LIST_H

typedef struct sFilename FNODE;
typedef FNODE *FNODEPTR;

FNODEPTR create_filename_list();
void add_filename_node(FNODEPTR *fnFilename, char *chaFilename);
void remove_filename_node(FNODEPTR *fnFilename);
void print_filename_list(struct sFilename *);
void destroy_filename_list(FNODEPTR fnFilename);

#endif

此列表将作为对将解析内容并将其加载到数据库的其他函数（模块）的引用传递。虽然我不能使用node-＆gt; chaFilename来打开我需要加载到数据库中的文件。

我遇到了一个新问题，当我调用解析器函数传递* node作为参考编译器时，抱怨与上面相同。例如：

parser.c：

//Built-in libs
#include <stdio.h>
#include <stdlib.h>

//Homemade libs
#include "parser.h"
#include "list.h"

int start_parse(FNODEPTR *node)
{
    if(node!=NULL)
    {
        printf("Node is not null\n");
        while(node!=NULL)
        {
            printf("\tNode address %x\n", (unsigned int)node);
            node=node->next;
        };
    }

    return 1;
}

parser.h：

#include "list.h"

#ifndef PARSER_H
#define PARSER_H
int start_parse(FNODEPTR *node);
#endif

GCC输出：

gcc -Wall   -c -o parser.o parser.c
parser.c: In function 'start_parse':
parser.c:16: warning: cast from pointer to integer of different size
parser.c:17: error: request for member 'next' in something not a structure or union
make: *** [parser.o] Error 1

有什么想法吗？

提前致谢，对任何英语错误感到抱歉。

Answer 1

struct sFilename
{
    char chaFilename[25];
    struct sFilename *next;
};

这应该在list.h文件中定义，在语句之前：

typedef struct sFilename FNODE;
typedef FNODE *FNODEPTR;

EDIT ::

int start_parse(FNODEPTR *node)应该是int start_parse(FNODEPTR node)

取消引用指向不完整类型的指针 - 列表

1 个答案: