2015-第14周项目3-OPP版电子词典

#include <fstream>
#include<iostream>
#include<string>
#include<cstdlib>
using namespace std;

//定义词条类
class Word
{
public:
void set(string e, string c, string wc);
int compare(string);  //英语部分与给定字符串比较，等于返回，大于返回，小于返回-1
string getChinese();
string getWord_class();
private:
string english;
string chinese;
string word_class;
};

void Word::set(string e, string c, string wc)
{
english=e;
chinese=c;
word_class=wc;
}

int Word::compare(string k)
{
return english.compare(k);
}

string Word::getChinese()
{
return chinese;
}

string Word::getWord_class()
{
return word_class;
}

//定义字典类
class Dictionary
{
public:
Dictionary();
void searchWord(string k);
private:
int BinSeareh(int low, int high, string k);
int wordsNum;
Word words[8000]; //用于保存词库
};

Dictionary::Dictionary()
{
string e,c,wc;
wordsNum=0;
//将文件中的数据读入到对象数组中
ifstream infile("dictionary.txt",ios::in);  //以输入的方式打开文件
if(!infile)       //测试是否成功打开
{
cerr<<"dictionary open error!"<<endl;
exit(1);
}
while (!infile.eof())
{
infile>>e>>c>>wc;
words[wordsNum].set(e, c, wc);
++wordsNum;
}
infile.close();
}

int Dictionary::BinSeareh(int low, int high, string key)
{
int mid;
while(low<=high)
{
mid=(low + high) / 2;
if(words[mid].compare(key)==0)
{
return mid; //查找成功返回
}
if(words[mid].compare(key)>0)
high=mid-1; //继续在w[low..mid-1]中查找
else
low=mid+1; //继续在w[mid+1..high]中查找
}
return -1; //当low>high时表示查找区间为空，查找失败
}

void Dictionary::searchWord(string key)
{
int low=0,high=wordsNum-1;  //置当前查找区间上、下界的初值
int index=BinSeareh(low, high, key);
if(index>=0)
cout<<key<<"--->"<<words[index].getWord_class()+"\t"<<words[index].getChinese();
else
cout<<"查无此词";
cout<<endl<<endl;
}

int main( )
{
Dictionary dict;
string key;

do
{
cout<<"请输入待查询的关键词（英文）,0000结束："<<endl;
cin>>key;
if (key!="0000")
{
dict.searchWord(key);
}
}
while(key!="0000");
cout<<"欢迎再次使用！"<<endl<<endl;
return 0;
}

#include <fstream>
#include<iostream>
#include<string>
#include<cstdlib>
using namespace std;

//定义词条类
class Word
{
public:
void set(string e, string c, string wc);
int compare(string);  //英语部分与给定字符串比较，等于返回，大于返回，小于返回-1
string getChinese();
string getWord_class();
private:
string english;
string chinese;
string word_class;
};

void Word::set(string e, string c, string wc)
{
english=e;
chinese=c;
word_class=wc;
}

int Word::compare(string k)
{
return english.compare(k);
}

string Word::getChinese()
{
return chinese;
}

string Word::getWord_class()
{
return word_class;
}

//定义字典类
class Dictionary
{
public:
Dictionary();
string searchWord(string k);
private:
int BinSeareh(int low, int high, string k);
int wordsNum;
Word words[8000]; //用于保存词库
};

Dictionary::Dictionary()
{
string e,c,wc;
wordsNum=0;
//将文件中的数据读入到对象数组中
ifstream infile("dictionary.txt",ios::in);  //以输入的方式打开文件
if(!infile)       //测试是否成功打开
{
cerr<<"dictionary open error!"<<endl;
exit(1);
}
while (!infile.eof())
{
infile>>e>>c>>wc;
words[wordsNum].set(e, c, wc);
++wordsNum;
}
infile.close();
}

int Dictionary::BinSeareh(int low, int high, string key)
{
int mid;
while(low<=high)
{
mid=(low + high) / 2;
if(words[mid].compare(key)==0)
{
return mid; //查找成功返回
}
if(words[mid].compare(key)>0)
high=mid-1; //继续在w[low..mid-1]中查找
else
low=mid+1; //继续在w[mid+1..high]中查找
}
return -1; //当low>high时表示查找区间为空，查找失败
}

string Dictionary::searchWord(string key)
{
int low=0,high=wordsNum-1;  //置当前查找区间上、下界的初值
int index=BinSeareh(low, high, key);
if(index>=0)
return words[index].getWord_class()+words[index].getChinese();
else
return "查无此词";
}

int main( )
{
Dictionary dict;
ifstream txtfile("aboutcpp.txt",ios::in);  //以输入的方式打开文件
if(!txtfile)       //测试是否成功打开
{
cerr<<"text file open error!"<<endl;
exit(1);
}
string word; //待查的词
while (txtfile>>word)
{
cout<<word<<"<------ "<<dict.searchWord(word)<<endl;
}
txtfile.close();
return 0;
}