描述:
使用map中的find（）方法 VC6中
编译提示出错：
--------------------Configuration: AutoParticiple - Win32 Debug--------------------
Compiling...
Dictionary.cpp
F:\Project\Visual C++\AutoParticiple\Dictionary.cpp(30) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'class std::_Tree<int,struct std::pair<int const ,int>,struct std::map<int,int,struct std::less<int>,cla
ss std::allocator<int> >::_Kfn,struct std::less<int>,class std::allocator<int> >::const_iterator' (or there is no acceptable conversion)
F:\Project\Visual C++\AutoParticiple\Dictionary.cpp(31) : error C2679: binary '!=' : no operator defined which takes a right-hand operand of type 'class std::_Tree<int,struct std::pair<int const ,int>,struct std::map<int,int,struct std::less<int>,cl
ass std::allocator<int> >::_Kfn,struct std::less<int>,class std::allocator<int> >::const_iterator' (or there is no acceptable conversion)
Error executing cl.exe.
AutoParticiple.exe - 2 error(s), 0 warning(s)
源码如下
Dictionary.h
#ifndef _Dictionary_H_
#define _Dictionary_H_
#pragma warning(disable: 4786)
#include <iostream>
#include <fstream>
#include <string>
#include <map>
using namespace std;
const string DICTIONARYNAME("words.dictionary");
class Dictionary {
public:
Dictionary();
~Dictionary();
bool IsWord(string&) const;
int getIndex(string&) const;
int getFrequency(int) const;
private:
map<string, int> wordDictionary;
map<int, int> frequencyDictionary;
void OpenDictionary();
};
#endif
Dictioanry.cpp
#include "Dictionary.h"
Dictionary::Dictionary()
{
OpenDictionary();
}
Dictionary::~Dictionary()
{
wordDictionary.clear();
frequencyDictionary.clear();
}
/* Esitimate whether a word in word dictionary. */
bool Dictionary::IsWord(string& word) const
{
if(wordDictionary.find(word) != wordDictionary.end())
return true;
return false;
}
int Dictionary::getFrequency(int id) const
{
map<int, int>::iterator position;
position = frequencyDictionary.find(id);
if(position != frequencyDictionary.end())
return (*position).second;
else
return -1;
}
void Dictionary::OpenDictionary()
{
FILE *fpDictionary;
if((fpDictionary = fopen(DICTIONARYNAME.c_str(), "r")) == NULL) {
cout << "Cannot open the Dictionary file!";
exit(1);
}
int id, frequency;
char word[16];
while(fscanf(fpDictionary, "%d %s %d", &id, word, &frequency) != EOF) {
wordDictionary.insert(pair<string, int>(word, id));
frequencyDictionary.insert(pair<int, int>(id, frequency));
}
fclose(fpDictionary);
}
如何解决？