Question

I want to make the line marked with // THIS LINE SHOULD BE PRINTING do its thing, which is print the int values between ‘synonyms’ and ‘antonyms’.

This is the text file:

dictionary.txt

1 cute 2 hello 3 ugly 4 easy 5 difficult 6 tired 7 beautiful synonyms 1 7 7 1 antonyms 1 3 3 1 7 4 5 5 4 7 3       #include <iostream> #include <fstream> #include <string>  #include <sstream> #include <vector>   using namespace std;  class WordInfo{        public:               WordInfo(){}               ~WordInfo() {                   }               int id() const {return myId;}               void readWords(istream &in)              {                in>>myId>>word;                   }                void pushSynonyms (string synline, vector <WordInfo> wordInfoVector)               {               stringstream synstream(synline);               vector<int> synsAux;               int num;               while (synstream >> num) synsAux.push_back(num);                for (int i=0; i<synsAux.size(); i++){               cout<<synsAux[i]<<endl;  //THIS LINE SHOULD BE PRINTING               }                        }               void pushAntonyms (string antline, vector <WordInfo> wordInfoVector)              {               }               //--dictionary output function               void printWords (ostream &out)              {                 out<<myId<< ' '<<word;                   }                 //--equals operator for String              bool operator == (const string &aString)const              {                            return word ==aString;                }                //--less than operator               bool operator <(const WordInfo &otherWordInfo) const              { return word<otherWordInfo.word;}               //--more than operator               bool operator > (const WordInfo &otherWordInfo)const              {return word>otherWordInfo.word;}               private:                    vector <int> mySynonyms;                    vector <int> myAntonyms;                    string word;                    int myId;         };        //--Definition of input operator for WordInfo       istream & operator >>(istream &in, WordInfo &word)       {          word.readWords(in);         }          //--Definition of output operator        ostream & operator <<(ostream &out, WordInfo &word)       {             word.printWords(out);          }        int main() {            string wordFile;           cout<<'enter name of dictionary file: ';           getline (cin,wordFile);            ifstream inStream (wordFile.data());            if(!inStream.is_open())           {           cerr<<'cannot open '<<wordFile<<endl;            exit(1);                                  }            vector <WordInfo> wordVector;             WordInfo aword;              while (inStream >>aword && (!(aword=='synonyms')))           {               wordVector.push_back(aword);                 }            int i=0;                     while (i<wordVector.size()){                 cout<<wordVector[i]<<endl;                 i++;                 }               vector <int> intVector;           string aLine; //suspect             // bad statement?           while (getline(inStream, aLine)&&(aLine!=('antonyms'))){                  aword.pushSynonyms(aLine, wordVector);                  }               system('PAUSE');            return 0;       } 

Answer 1

The problem seems to be here:

in>>myId>>word; 

On the ‘synonyms’ line the extraction of myId fails and sets failbit on the stream, which causes the following extractions to also fail. You have to reset the error control state before extracting further elements (like the word ‘synonyms’) from the stream:

in.clear();