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POC++ problem in calling a function in main that prints the map
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  1. POC++ problem in calling a function in main that prints the map
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    copied!<p>I am trying to print the contents of the map and this is where my code fails. I have tested all my methods and I have no problem to read from file, filer the word, put it into map, and even the print function is working. However, when I am calling the printer function from main it does not print the map. I am new to polymorphism and I think that my error is in how I am passing the map to the function in main. </p> <p>Here is my main class:</p> <pre><code>using namespace std; #include &lt;iostream&gt; #include "ReadWords.h" #include "ReadPunctWords.h" #include "ReadNumWords.h" #include "ReadCapWords.h" #include "MapWorks.h" #include &lt;fstream&gt; #include &lt;string&gt; #include &lt;map&gt; #include &lt;iterator&gt; /** * This main function uses all other classes. */ int main() { char* name = "RomeoJuliet.txt"; //ReadPunctWords &amp;obj = *new ReadPunctWords(name); ReadPunctWords obj(name); string startSearch="BEGIN"; string endSearch="FINIS"; ReadPunctWords rpw; ReadCapWords rcw; ReadNumWords rnw; MapWorks mw; while(rpw.isNextWord()){ string tempword = obj.getNextWord(); if(tempword == startSearch){ break; } } while(rpw.isNextWord()){ string tempword = obj.getNextWord(); if(tempword == endSearch){ break; } else{ if(rpw.filter(tempword)){ mw.addToMap(tempword, mw.mapPunct); } if(rcw.filter(tempword)){ mw.addToMap(tempword, mw.mapCap); } if(rnw.filter(tempword)){ mw.addToMap(tempword, mw.mapNum); } } } mw.printMap(mw.mapPunct); mw.printMap(mw.mapCap); mw.printMap(mw.mapNum); //clear map mw.clearMap(mw.mapPunct); mw.clearMap(mw.mapCap); mw.clearMap(mw.mapNum); //close the file //obj.close(); //delete &amp;obj; //exit(0); // normal exit return 0; } </code></pre> <p>And my MapWorks.cpp which contains the maps and the functions related to maps:</p> <pre><code>using namespace std; #include &lt;iostream&gt; #include &lt;string&gt; #include &lt;map&gt; #include &lt;iterator&gt; #include "MapWorks.h" /** * MapWorks class builds the maps and does the map processing and printing */ MapWorks::MapWorks() {} void MapWorks::addToMap(string myword, map&lt;string, int&gt; &amp; myMap){ int n = myMap[myword]; myMap[myword]= n+1; } void MapWorks::printMap (map&lt;string, int&gt; &amp;myMap){ for (map&lt;string, int&gt;::iterator it = myMap.begin(); it != myMap.end(); ++it) { cout &lt;&lt; it-&gt;first &lt;&lt; " ==&gt; " &lt;&lt; it-&gt;second &lt;&lt; '\n'&lt;&lt;endl; } } //delete entries in map void MapWorks::clearMap(map&lt;string, int&gt;myMap) { myMap.clear(); } </code></pre> <p>MapWorks.h :</p> <pre><code>#ifndef MAPWORKS_H #define MAPWORKS_H #include &lt;string&gt; #include &lt;map&gt; using namespace std; /** * MapWorks class builds the maps and does the map processing and printing */ class MapWorks { public: map&lt;string, int&gt; mapPunct; //(word, number of occurences) map&lt;string, int&gt; mapNum; //(word, number of occurences) map&lt;string, int&gt; mapCap; //(word, number of occurences) MapWorks(); void addToMap(string myword, map&lt;string, int&gt; &amp; myMap); //adds words to a map void printMap (map&lt;string, int&gt; &amp;myMap); //prints the map void clearMap(map&lt;string, int&gt;); //clear map }; #endif </code></pre> <p>My ReadWords.h :</p> <pre><code>/** * ReadWords class, the base class for ReadNumWords, ReadPunctWords, ReadCapWords */ #ifndef READWORDS_H #define READWORDS_H using namespace std; #include &lt;string&gt; #include &lt;fstream&gt; #include&lt;iostream&gt; class ReadWords { private: string nextword; ifstream wordfile; bool eoffound; public: /** * Constructor. Opens the file with the default name "text.txt". * Program exits with an error message if the file does not exist. */ ReadWords(); /** * Constructor. Opens the file with the given filename. * Program exits with an error message if the file does not exist. * @param filename - a C string naming the file to read. */ ReadWords(char *filename); /** * Closes the file. */ void close(); /** * Returns a string, being the next word in the file. * @return - string - next word. */ string getNextWord(); /** * Returns true if there is a further word in the file, false if we have reached the * end of file. * @return - bool - !eof */ bool isNextWord(); //pure virtual function for filter virtual bool filter(string word)=0; /** * Fix the word by the definition of "word" * end of file. * @return - string */ string fix(string word); }; #endif </code></pre> <p>And my ReadPunctWords (ReadNumWords and ReadCapWords are quite the same, just checking if the word has digits or capital letters instead of punctuations like in here):</p> <pre><code>#ifndef READPUNCTWORDS_H #define READPUNCTWORDS_H using namespace std; #include &lt;string&gt; #include "ReadWords.h" /** * ReadPunctWords inherits ReadWords, so MUST define the function filter. * It chooses to override the default constructor. */ class ReadPunctWords: public ReadWords { public: ReadPunctWords(); ReadPunctWords(char *filename): ReadWords(filename){}; virtual bool filter(string word); }; #endif </code></pre> <p>I would appreciate any help from you. Thanks, Adriana</p>
 

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