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Write a program that reads the contents of a text file. The program should then create a structure that has 3 fields: a word, the frequency of the word, the list of line numbers where the word appears. Then the program will open a text file and read the content of the file. It will create another text file as output file. The output file should contain an alphabetical listing of the words, their frequency, and the list of line numbers where the word appears. - g

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  1. 19 August, 08:39
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    Explanation:

    #include

    #include

    #include

    #include

    #include

    #include

    using namespace std;

    / / structure to hold the word, frequency and list of lines in which word appears

    struct wordFrequency

    {

    string word;

    int frequency;

    vector lineNumber;

    };

    / / main method

    int main ()

    {

    / / input file name. You can change the input file name if your file name is different

    string inputFileName = "data. txt";

    / / creating a map class object to hold words uniquely

    map map_word;

    / / ifstream class object to open and read from file

    ifstream fin (inputFileName);

    / / validating if file is opened or not

    if (! fin. is_open ())

    {

    cout << "Error in opening file!";

    exit (1);

    }

    / / string to hold line from file

    string line;

    / / int variable to keep track of line number

    int lineNumber = 0;

    / / fetching lines from file

    while (getline (fin, line))

    {

    / / increasing the lineNumber count because we fetch another line

    ++lineNumber;

    / / breaking a line into words using stringstream class object

    string word;

    stringstream iss (line);

    / / iterating over all the words in a line

    while (iss >> word)

    {

    / / if the word is not in the map then we create and add a new pair

    auto it = map_word. find (word);

    if (it = = map_word. end ())

    {

    / / creating a new struct object to store new word

    wordFrequency w;

    w. word = word;

    w. frequency = 1;

    w. lineNumber. push_back (lineNumber);

    map_word. insert ({word, w});

    }

    else

    {

    / / if the word is already there then incresing frequency and push line number into list

    it->second. frequency + = 1;

    it->second. lineNumber. push_back (lineNumber);

    }

    }

    }

    / / closing the input file

    fin. close ();

    / / creating a new output file

    ofstream fout ("WordFrequency. txt");

    if (fout. is_open ())

    {

    / / iterating over a map

    for (auto word : map_word)

    {

    / / writing data to a output file

    fout << "Word is : " << word. second. word << endl;

    fout << "Frequency is : " << word. second. frequency << endl;

    fout << "Appears in line : ";

    for (auto i : word. second. lineNumber)

    {

    fout << i << " ";

    }

    fout << endl

    << endl;

    }

    / / closing output file

    fout. close ();

    }

    else

    {

    cout << "Error! Not able to create output file!";

    }

    }
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