我有一个为班级编写的哈希表模板。我有一个依赖于使用这个哈希表的项目。它接受一个无符号整数值来初始化它拥有的桶数,以及一个要指向的哈希函数。我还没有写那个散列函数,但是我有一个声明。当我尝试在我的 Game 类中为哈希表数据成员使用成员初始化程序时,它给了我一个我不明白的错误。
Error 1 error C3867: 'Game::xorHash': function call missing argument list; use '&Game::xorHash' to create a pointer to member
2 IntelliSense: no instance of constructor "HTable<Type>::HTable [with Type=std::string]" matches the argument list
argument types are: (int, unsigned int (const std::string &s))
我的哈希表类如下:
#pragma once
#include "SLList.h"
template<typename Type> class HTable
{
public:
HTable(unsigned int numOfBuckets, unsigned int (*hFunction) (const Type &v));
~HTable();
HTable<Type>& operator=(const HTable<Type>& that);
HTable(const HTable<Type>& that);
void insert(const Type& v);
bool findAndRemove(const Type& v);
void clear();
int find(const Type& v) const;
private:
SLList<Type>* ht;
unsigned int (*hFunct) (const Type &v);
unsigned int numOfBuck;
};
template<typename Type>
HTable<Type>::HTable(unsigned int numOfBuckets, unsigned int (*hFunction) (const Type &v))
{
ht = new SLList<Type>[numOfBuckets];
this->numOfBuck = numOfBuckets;
this->hFunct = hFunction;
}
template<typename Type>
HTable<Type>::~HTable()
{
delete [] ht;
ht = nullptr;
}
template<typename Type>
HTable<Type>& HTable<Type>::operator=(const HTable<Type>& that)
{
if(this != &that)
{
delete [] this->ht;
this->hFunct = that.hFunct;
this->numOfBuck = that.numOfBuck;
this->ht = new SLList<Type>[numOfBuck];
for(unsigned int i = 0; i < this->numOfBuck; i++)
this->ht[i] = that.ht[i];
}
return *this;
}
template<typename Type>
HTable<Type>::HTable(const HTable<Type>& that)
{
this = *that;
}
template<typename Type>
void HTable<Type>::insert(const Type& v)
{
ht[hFunct(v)].addHead(v);
}
template<typename Type>
bool HTable<Type>::findAndRemove(const Type& v)
{
SLLIter<Type> iter(ht[hFunct(v)]);
for(iter.begin(); !iter.end(); ++iter)
{
if(v == iter.current())
{
ht[hFunct(v)].remove(iter);
return true;
}
}
return false;
}
template<typename Type>
void HTable<Type>::clear()
{
for(unsigned int i = 0; i < this->numOfBuck; ++i)
ht[i].clear();
}
template<typename Type>
int HTable<Type>::find(const Type& v) const
{
SLLIter<Type> iter(ht[hFunct(v)]);
for(iter.begin(); !iter.end(); ++iter)
{
if(v == iter.current())
return hFunct(v);
}
return -1;
}
我的游戏.h:
#pragma once
#include "stdafx.h"
#include "HTable.h"
#include "BST.h"
#include "DTSTimer.h"
using namespace std;
class Game
{
public:
Game(void);
virtual ~Game(void);
void refresh();
void input();
unsigned int xorHash(const string &s);
private:
string userInput;
DTSTimer timer;
BST<string> answers;
HTable<string> dictionary;
};
我的 Game.cpp (这显然只是一个骨架,因为我无法让成员 init 工作)
#include "Game.h"
Game::Game(void) : dictionary(2048, xorHash)
{
}
Game::~Game(void)
{
}
void Game::refresh()
{
}
void Game::input()
{
}
unsigned int Game::xorHash(const string &s)
{
return 0;
}
我已经为此工作了很长时间,并且一直在碰壁。我非常感谢有关如何启动和运行这件事的一些帮助。让我知道是否需要查看另一个片段(在这方面我已经尝试过彻底)。