search in vector .. anyidea.??

This is a discussion on search in vector .. anyidea.?? within the C++ Programming forums, part of the General Programming Boards category; hi everyone ... first of all, i let you guyz know what i am doing here... and will list the ...

  1. #1
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    search in vector .. anyidea.??

    hi everyone ... first of all, i let you guyz know what i am doing here... and will list the problem tat i got....

    well i want to performs a search for the seqence of words finding files containing all of the search words...

    in my implememntation (.cpp)

    Code:
    #include "inverted_index.h"
    #include "osdir.h"
    
    // InvertedIndex::tally
    //   Pre: a word and file pair as strings
    //   Post: adds the file to the index under word
    void InvertedIndex::tally(string word, string file) 
    {
         inputType input(word, file);
         list.push_back( input );
    }
    
    // InvertedIndex::search 
    // Pre: a vector of strings as search terms
    // Post: a vector of strings being the files that all of the
    //      input words occur in in the index.
    StringSet InvertedIndex::search(vector <string> words) 
    {
         for(int i = 0; i < list.size(); i++)
         {
               if(list.word[i] == words)
                  return list.file[i];
         }        
    }
    and the main is

    Code:
    #include "inverted_index.h"
    
    int main() 
    {
      // test the InvertedIndex 
     InvertedIndex idx;
     idx.tally("cat", "cats.txt");
     idx.tally("cat", "animals.txt");
     idx.tally("cat", "everything.txt");
     idx.tally("dog", "dogs.txt");
    
       // searching idx for cat should give us three files
      vector <string> query;
      query.push_back("cat");
      StringSet si = idx.search(query);
      if (si.contains("cats.txt") && si.contains("animals.txt") && si.contains("everything.txt") )
        cout << "ok - search('cat')\n";
      else 
        cout << "fail - search('cat')\n";
    
      if (si.contains("dogs.txt"))
        cout << "fail - search('cat') -- dogs.txt found\n";
      else 
        cout << "ok - search('cat') no dogs\n";
    
    
      system("PAUSE");
      return 0;
    }
    can someone check my code for the red font.... please//

  2. #2
    Its hard... But im here swgh's Avatar
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    Code:
    system("pause")
    Please don't use this, use

    Code:
    cin.get();
    Only use a system command if you really have to, but there is always another way around using one.

  3. #3
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    Quote Originally Posted by swgh
    Code:
    system("pause")
    Please don't use this, use

    Code:
    cin.get();
    Only use a system command if you really have to, but there is always another way around using one.

    why is that ? please explain... thank you...

  4. #4
    Its hard... But im here swgh's Avatar
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    system pause is known to be a bad choice for feezing the console window. Read the FAQ on this site for a detailed explaination. I will not go into an argument about why it should / should not be used but in general program practice, system pause is frowned upon. Cin.get() is a cleaner and more efficient way to pause the console window.

    As I stated above, read the FAQ for a good reason to not use system pause. I belive it has somthing to do with program security issues.

  5. #5
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    can someone give me an idea of how to design this function please?

  6. #6
    C++ Witch laserlight's Avatar
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    What's an inputType? What is the type of the list member variable? What is a StringSet? An Inverted Index?

    Really, post the smallest and simplest compilable program that demonstrates the error/problem.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  7. #7
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    Smile

    you have PM laserlight.....

  8. #8
    Registered User Tonto's Avatar
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    Just post here, it makes me, I mean me, feel left out.

    Code:
               if(list.word[i] == words)
                  return list.file[i];
    Unless list.words[i] has an operator vector<string>() and an operator StringSet, that section of code will not work. In fact, that whole thing is not logical. Edited.
    Last edited by Tonto; 10-02-2006 at 06:22 PM.

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