统计单词出现的次数

#include

#include

#include

#include

#include

using namespace std;

 

版本1

/*

void count_word(ifstream &in,ofstream &out)

{

     string word;

     int err=0;

     map dict;

     while(in>>word,!in.eof()) {

        if(in.bad())

           throw runtime_error("io data bad\n");

        if(in.fail()) {

           cout<<"io data fail"<

           err++;

           in.clear();

           in.sync();

           continue;

        }

        dict[word]++;

     }

    

     cout<<"发生读写错误:"<次"<

    

     for(map::iterator iter=dict.begin(); iter!=dict.end(); iter++)

     {

        out<<(*iter).first<<"     "<<(*iter).second<

     }

}

*/

 

 

版本2

void count_word(ifstream &in,ofstream &out)

{

     string word;

     int err=0;

     map dict;

     while(in>>word,!in.eof()) {

        if(in.bad())

           throw runtime_error("io data bad\n");

        if(in.fail()) {

           cout<<"io data fail"<

           err++;

           in.clear();

           in.sync();

           continue;

        }

        pair< map::iterator,bool > iter;

        iter=dict.insert(make_pair(word,1));

        if ( !iter.second )

           (*iter.first).second++;

     }

    

     cout<<"发生读写错误:"<次"<

    

     for(map::iterator iter=dict.begin(); iter!=dict.end(); iter++)

     {

        out<<(*iter).first<<"     "<<(*iter).second<

     }

}

 

 

int main()

{

    ifstream in("aa1.txt");

    ofstream out("bb.txt");

    count_word(in,out);

   

    getchar();

    return 0;    

}