c - 如何在c程序中编译expat xml解析？以及在哪里安装 expat。 cygwin编译器中文件放置的位置

Question

这是我第一次使用外部 header ，我对外籍人士一无所知。Expat 官方网站对于初学者来说没什么用。我需要使用 expat.h 用 C 语言编译 XML 解析器代码。我已经下载了 expat 文件并将路径包含在头文件中。但在编译时出现错误。在windows平台上

    #include "C:\Program Files (x86)\Expat 2.2.7\Source\lib\expat.h"
    #include <stdlib.h>
    #include <stdio.h>
    #include <string.h>

     int parse_xml(char *buff)
     {
    FILE *fp;
    fp = fopen("config.xml", "r");
    if(fp == NULL)
    {
        printf("Failed to open file\n");
        return 1;
    }

   /* Obtain the file size. */
    fseek (fp, 0, SEEK_END);
    size_t file_size = ftell(fp);
    rewind(fp);

    XML_Parser parser = XML_ParserCreate(NULL);
    int done;
    memset(buff, 0, sizeof(buff));

    do
    {
        size_t len = fread(buff, 1, file_size, fp);
        done = len < sizeof(buff);

        if(XML_Parse(parser, buff, len, done) == XML_STATUS_ERROR)
        {
            printf("%s at line %d\n", XML_ErrorString(XML_GetErrorCode(parser)),
                                      XML_GetCurrentLineNumber(parser));
            return 1;
        }
    }
    while(!done);

    fclose(fp);
    XML_ParserFree(parser);

    return 0;
}

这是代码，路径是安装后expat.h所在的位置。

xml代码

`<catalog>
   <book id="bk101">
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <genre>Computer</genre>
      <price>44.95</price>
      <publish_date>2000-10-01</publish_date>
      <description>An in-depth look at creating applications
      with XML.</description>
   </book>
   <book id="bk102">
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-12-16</publish_date>
      <description>A former architect battles corporate zombies,
      an evil sorceress, and her own childhood to become queen
      of the world.</description>
   </book>
   <book id="bk103">
      <author>Corets, Eva</author>
      <title>Maeve Ascendant</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-11-17</publish_date>
      <description>After the collapse of a nanotechnology
      society in England, the young survivors lay the
      foundation for a new society.</description>
   </book>
</catalog>`

请帮忙!

Answer 1

您似乎知道必须执行 -lexpat 以便头文件实际上链接到某些内容，但您忘记将 Expat 添加到链接路径。添加此命令行选项:-L/path/to/your/expat/lib/directory。对于 WinMain 错误，请尝试添加 -Wl,-subsystem,console。希望对您有帮助!