我确信过去已经解决了这个问题。道歉。
我想了解为什么我收到错误LNK2019
以及解决问题的方向。
Errors are LNK2019:
unresolved external symbol __imp__ReportError referenced in function _wmain
unresolved external symbol __imp__Options referenced in function _wmain
当我在Visual Studio 2010及更高版本中构建解决方案时会发生这种情况 上述方法的头文件内容如下所述：
LIBSPEC DWORD Options (int, LPCTSTR *, LPCTSTR, ...);
LIBSPEC DWORD Options (int, LPCTSTR *, LPCTSTR, ...);
主要代码：
#include "Everything.h"
BOOL TraverseDirectory(LPTSTR, LPTSTR, DWORD, LPBOOL);
DWORD FileType(LPWIN32_FIND_DATA);
BOOL ProcessItem(LPWIN32_FIND_DATA, DWORD, LPBOOL);
int _tmain(int argc, LPTSTR argv[])
{
BOOL flags[MAX_OPTIONS], ok = TRUE;
TCHAR searchPattern[MAX_PATH + 1], currPath[MAX_PATH_LONG+1], parentPath[MAX_PATH_LONG+1];
LPTSTR pSlash, pSearchPattern;
int i, fileIndex;
DWORD pathLength;
fileIndex = Options(argc, argv, _T("Rl"), &flags[0], &flags[1], NULL);
pathLength = GetCurrentDirectory(MAX_PATH_LONG, currPath);
if (pathLength == 0 || pathLength >= MAX_PATH_LONG) { /* pathLength >= MAX_PATH_LONG (32780) should be impossible */
ReportError(_T("GetCurrentDirectory failed"), 1, TRUE);
}
if (argc < fileIndex + 1)
ok = TraverseDirectory(currPath, _T("*"), MAX_OPTIONS, flags);
else for (i = fileIndex; i < argc; i++) {
if (_tcslen(argv[i]) >= MAX_PATH) {
ReportError(_T("The command line argument is longer than the maximum this program supports"), 2, FALSE);
}
_tcscpy(searchPattern, argv[i]);
_tcscpy(parentPath, argv[i]);
pSlash = _tstrrchr(parentPath, _T('\\'));
if (pSlash != NULL) {
*pSlash = _T('\0');
_tcscat(parentPath, _T("\\"));
SetCurrentDirectory(parentPath);
pSlash = _tstrrchr(searchPattern, _T('\\'));
pSearchPattern = pSlash + 1;
} else {
_tcscpy(parentPath, _T(".\\"));
pSearchPattern = searchPattern;
}
ok = TraverseDirectory(parentPath, pSearchPattern, MAX_OPTIONS, flags) && ok;
SetCurrentDirectory(currPath);
}
return ok ? 0 : 1;
}
static BOOL TraverseDirectory(LPTSTR parentPath, LPTSTR searchPattern, DWORD numFlags, LPBOOL flags)
{
HANDLE searchHandle;
WIN32_FIND_DATA findData;
BOOL recursive = flags[0];
DWORD fType, iPass, lenParentPath;
TCHAR subdirectoryPath[MAX_PATH + 1];
/* Open up the directory search handle and get the
first file name to satisfy the path name.
Make two passes. The first processes the files
and the second processes the directories. */
if ( _tcslen(searchPattern) == 0 ) {
_tcscat(searchPattern, _T("*"));
}
/* Add a backslash, if needed, at the end of the parent path */
if (parentPath[_tcslen(parentPath)-1] != _T('\\') ) { /* Add a \ to the end of the parent path, unless there already is one */
_tcscat (parentPath, _T("\\"));
}
/* Open up the directory search handle and get the
first file name to satisfy the path name. Make two passes.
The first processes the files and the second processes the directories. */
for (iPass = 1; iPass <= 2; iPass++) {
searchHandle = FindFirstFile(searchPattern, &findData);
if (searchHandle == INVALID_HANDLE_VALUE) {
ReportError(_T("Error opening Search Handle."), 0, TRUE);
return FALSE;
}
do {
fType = FileType(&findData);
if (iPass == 1) /* ProcessItem is "print attributes". */
ProcessItem(&findData, MAX_OPTIONS, flags);
lenParentPath = (DWORD)_tcslen(parentPath);
/* Traverse the subdirectory on the second pass. */
if (fType == TYPE_DIR && iPass == 2 && recursive) {
_tprintf(_T("\n%s%s:"), parentPath, findData.cFileName);
SetCurrentDirectory(findData.cFileName);
if (_tcslen(parentPath) + _tcslen(findData.cFileName) >= MAX_PATH_LONG-1) {
ReportError(_T("Path Name is too long"), 10, FALSE);
}
_tcscpy(subdirectoryPath, parentPath);
_tcscat (subdirectoryPath, findData.cFileName); /* The parent path terminates with \ before the _tcscat call */
TraverseDirectory(subdirectoryPath, _T("*"), numFlags, flags);
SetCurrentDirectory(_T("..")); /* Restore the current directory */
}
/* Get the next file or directory name. */
} while (FindNextFile(searchHandle, &findData));
FindClose(searchHandle);
}
return TRUE;
}
static DWORD FileType(LPWIN32_FIND_DATA pFileData)
{
BOOL isDir;
DWORD fType;
fType = TYPE_FILE;
isDir =(pFileData->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
if (isDir)
if (lstrcmp(pFileData->cFileName, _T(".")) == 0
|| lstrcmp(pFileData->cFileName, _T("..")) == 0)
fType = TYPE_DOT;
else fType = TYPE_DIR;
return fType;
}
static BOOL ProcessItem(LPWIN32_FIND_DATA pFileData, DWORD numFlags, LPBOOL flags)
{
const TCHAR fileTypeChar[] = {_T(' '), _T('d')};
DWORD fType = FileType(pFileData);
BOOL longList = flags[1];
SYSTEMTIME lastWrite;
if (fType != TYPE_FILE && fType != TYPE_DIR) return FALSE;
_tprintf(_T("\n"));
if (longList) {
_tprintf(_T("%c"), fileTypeChar[fType - 1]);
_tprintf(_T("%10d"), pFileData->nFileSizeLow);
FileTimeToSystemTime(&(pFileData->ftLastWriteTime), &lastWrite);
_tprintf(_T(" %02d/%02d/%04d %02d:%02d:%02d"),
lastWrite.wMonth, lastWrite.wDay,
lastWrite.wYear, lastWrite.wHour,
lastWrite.wMinute, lastWrite.wSecond);
}
_tprintf(_T(" %s"), pFileData->cFileName);
return TRUE;
}
答案 0 :(得分：2)
您收到的错误来自链接器，它告诉您它无法找到ReportError和{{1}的定义函数（两者都是从Options函数引用的）。
您说您已经包含了包含这些函数的头文件，但该头只包含这些函数的声明。你知道，就像他们的签名一样。它没有函数的主体（实现）。你需要定义。
您编写的函数定义通常位于main个文件中。如果您已编写这些函数，请确保已将包含其定义的代码文件添加到项目中。
对于您尚未编写的函数（即可重用的代码库的一部分），通常会为链接器提供一个*.cpp文件，其中包含调用函数所需的内容。如果这些函数来自库，请确保已将随附的*.lib文件添加到链接器将搜索的文件列表中。要在Visual Studio中执行此操作，请按照下列步骤操作：
*.lib文件的名称。答案 1 :(得分：1)
仅仅因为你在头文件中声明了一个函数，并不意味着它在任何地方都有一个正文。
链接错误表示该功能没有正文。
这可能是因为您没有链接到正确的库（.lib文件）。