这是我之前做过的非常基本的事情，但我不明白为什么我现在遇到问题。我正在创建一个对象'foo'，以便与文件之间的iostream活动轻松连接。
直到今天，我添加了几个似乎在定义文件的上下文中找到问题的方法，几乎整个项目都没有问题。
foo.h中：
#ifndef FOO_H
#define FOO_H
#include <string>
#include <fstream>
#include <vector>
using std::string;
using std::fstream;
using std::vector;
namespace FileSys
{
class foo
{
public:
foo();
/**
* Attempts to open a file from directory dir
* @param dir
* The path of the file to be opened
*/
foo( string dir );
/**
* Attempts to find a directory using the parent file's path as the root directory and extending the directory by the child string
* If child is null, the foo is replicated. Fails when parent.isDirectory() returns false.
* @param parent
* The parent file to be used as the root path
* @param child
* The child path to be used for extending the parent path
*/
foo( foo &parent, string child );
/**
* Attempts to find a directory using the parent path as the root directory and extending the directory by the child string
* If child is null, the foo is created with the parent path as the full path.
* @param parent
* The parent path to be used as the root path
* @param child
* The child path to be used for extending the parent path
*/
foo( string parent, string child );
/**
* Attempts to clone reference to a previously existing foo file
* @param file
* The file to be cloned
*/
foo( foo &file );
/**
* Returns the working directory of this file
*/
string getDir();
/**
* Writes the content supplied to the file, overwriting any existing data
*/
bool writeTrunc( string content );
/**
* Writes the content supplied to the file, appending it to the end of the file
*/
bool writeApp( string content );
/**
* Concatenates two files together. No implementation yet.
*/
bool concatFiles( foo file1, foo file2 );
/**
* Reads from file
*
* @param length
* How many bytes will be retrieved from the file
*/
string read( int length );
/**
* Reads from file
*
* @param length
* How many bytes will be retrieved from the file
*
* @param position
* Position to start reading from
*/
string read( int length, int position );
/**
* Returns everything from the file
*/
string readWholeFile();
/**
* Returns true if the file exists
*/
bool exists();
/**
* Attempts to delete the current file
* @return Returns true if successful and false otherwise
* The path of the file to be opened
*/
bool deleteFile();
/**
* Returns true if this foo is a directory, rather than a file
*/
bool isDirectory();
/**
* Returns the absolute path of the foo
*/
string getAbsolutePath();
/**
* Returns the parent directory of this foo
*/
foo getParentFile();
/**
* Creates all non-existent folders in mPath, creating the directory for this foo.
*/
bool mkdirs();
/**
* Clean the file attributes
*/
bool cleanFile();
/**
* Returns a list of all the directories and files contained within this directory
*/
vector<foo> list();
/**
* Deletes the file or directory from the file system
*/
bool destroy();
/**
* Overrides the '=' operator to perform an assignment properly
*/
foo& operator=(foo &file);
/**
* Overrides the '==' operator to perform an equality comparison on two foo
*/
bool operator==(foo &file);
/**
* Overrides the '!=' operator to perform an inequality comparison on two foo
*/
bool operator!=(foo &file);
~foo();
protected:
private:
string mPath;
fstream mFile;
bool mExists;
bool mIsFile;
/**
* Opens the file for operation
*
* @param openMode
* The mode the file should be opened in. Use ios::openmode modes to determine the open mode.
*
* @return Returns true if successfully opened and false if failed
*/
bool openFile( int openMode );
/**
* Indicates whether this foo is a file or a directory
* Returns true if a file and false if a directory.
*/
bool isFile();
/**
* Checks to see if the directory exists and attempts to create it if its parents exist
*
* @param dir
* The directory to be created
*
* @return Returns true if successful
*/
bool mkdirs( foo dir );
};
}
#endif // foo_H
Foo.cpp中：
#include "foo.h"
#include <string>
#include <fstream>
#include <vector>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <sys/stat.h>
using std::string;
using std::fstream;
using std::vector;
#ifdef _WIN32
#include <direct.h>
using namespace std;
#define mkdir(path,mode) _mkdir(path)
#define getcwd _getcwd
#endif
#define ROOT_WORKING_DIRECTORY "SomeDir"
namespace FileSys
{
////////////////////////////////////////////
// Ctors
////////////////////////////////////////////
foo::foo()
{ /*implementation*/ }
foo::foo( string dir )
{ /*implementation*/ }
foo::foo( foo &file )
{ /*implementation*/ }
foo::foo( foo &parent, string child )
{ /*implementation*/ }
foo::foo( string parent, string child )
{ /*implementation*/ }
////////////////////////////////////////////
// Public methods
////////////////////////////////////////////
string foo::getDir()
{ /*implementation*/ }
bool foo::deleteFile()
{ /*implementation*/ }
bool foo::exists()
{ /*implementation*/ }
bool foo::writeApp( string content )
{ /*implementation*/ }
bool foo::writeTrunc( string content )
{ /*implementation*/ }
string foo::read( int length )
{ /*implementation*/ }
string foo::read( int length, int position )
{ /*implementation*/ }
string foo::readWholeFile()
{ /*implementation*/ }
bool foo::isDirectory()
{ /*implementation*/ }
string foo::getAbsolutePath()
{ /*implementation*/ }
foo foo::getParentFile()
{ /*implementation*/ }
bool foo::mkdirs()
{ /*implementation*/ }
foo& foo::operator=(foo &file)
{ /*implementation*/ }
bool foo::operator==(foo &file) //err 2039: 'operator==' is not a member of foo
{ /*implementation*/ }
bool foo::operator!=(foo &file) //err 2039: 'operator!=' is not a member of foo
{ /*implementation*/ }
bool foo::cleanFile()
{ /*implementation*/ }
vector<foo> foo::list() //err 2039: 'list' is not a member of foo
{ /*implementation*/ }
bool foo::destroy() //err 2039: 'destroy' is not a member of foo
{ /*implementation*/ }
////////////////////////////////////////////
// Private methods
////////////////////////////////////////////
bool foo::openFile( int openMode )
{ /*implementation*/ }
bool foo::isFile()
{ /*implementation*/ }
bool foo::mkdirs( foo dir )
{ /*implementation*/ }
////////////////////////////////////////////
// Dtors
////////////////////////////////////////////
foo::~foo()
{ /*implementation*/ }
}
关于我为创建此问题所做的工作的任何线索？
编辑：我包含了真正的代码，只更改了类签名并删除了实现。我已经对语法进行了三次检查，以确保我没有拼错在不起作用的方法的范围分辨率中的类名。
答案 0 :(得分：6)
我们无法知道（因为你没有发布真正的C ++），但我的水晶球说：
你有两份“foo.h”。您编辑的那个不是#include指令找到的那个。
答案 1 :(得分：0)
如果我在你发布的代码中添加了适当的return语句，它就会编译。
我仍然认为最可能的原因是某个地方出现错字 - 如果您无法向我们展示您尝试编译的确切代码，请找一个可以显示代码并要求他们为您仔细检查的代码