Question

some people think cars they own is extension of their personality somehow the idea that cars define people is very materialistic for some for some people cars are just a way of transportation from point a to b I like cars some people like to collect old cars as a hobby I guess one needs to be rich to have such a hobby for some people cars are bad because gasoline pollutes environment do you like cars

Read this document and create frequency map in C++. Take the frequency map and display histogram for each word in the document.

Draw histogram in horizontal direction.

For example-

This (6) **********

my (4) ******

Truck (6) *********

##other similar answers u find on chegg not working.

Answer 1

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <map>
#include <iomanip>
using namespace std;

// Creates a map to store word and its frequency
map <string, int> wordFrequencyMap;

// Function to add a word to map
void addWord(string word)
{
// Creates an iterator for the map to search word
map<string, int> ::iterator iterate = wordFrequencyMap.find(word);

// Checks if iterator having the word
if(iterate != wordFrequencyMap.end())
// Increase the second by one
iterate->second = iterate->second + 1;
// Otherwise adds the word to map
else
wordFrequencyMap.insert(make_pair(word, 1));
}// End of function

// Function to read the file and calls the function to add the word to map
// Return true for success otherwise returns false
bool createMap()
{
// Opens the file for reading
ifstream readF("FrequencyWordUsingMap.txt");
// To sore the current line
string currentLine;

// Checks if file is opened
if(readF.is_open())
{
// Loops till end of the file
while(getline(readF, currentLine))
{

size_t previousPosition = 0, position;
// Loops till current line punctuation character and stores the position
while((position = currentLine.find_first_of("~`=!@#$%^&*)/\?-_|[,. }] (_-+{;':""></",
previousPosition)) != string::npos)
{
// Checks if current position is greater than earlier position
if(position > previousPosition)
// Calls the function to add the word subtracted from current list
addWord(currentLine.substr(previousPosition, position - previousPosition));
// Update the previous position by adding current position by one
previousPosition = position + 1;
}// End of inner while loop

// Otherwise checks if previous position is less then current line length
if(previousPosition < currentLine.length())
// Calls the function to add the word subtracted from current list
addWord(currentLine.substr(previousPosition, string::npos));
}// End of outer while loop

// Close the file
readF.close();
}// End of if condition

// Otherwise file cannot be opened display error message and return false
else
{
cout<<"\nERROR: Unable to open file for reading."<<endl;
return false;
}// End of else

// At the end return true for success
return true;
}// End of function

// Function to display each word, its frequency and bar chart
void showData()
{
// Loops till end of the map
for(map<string, int> :: iterator itrator = wordFrequencyMap.begin();
itrator != wordFrequencyMap.end(); ++itrator)
{
cout<<"\n "<< setw(30) <<itrator->first<<setw(3)<<"("<<itrator->second<<")";

// Loops till size of the second element in map to display '*'
for(int c = 0; c < itrator->second; c++)
cout<<"*";
}// End of for loop
}// End of function

int main()
{
// Checks if map is created
if(createMap())
{
// Displays map size and its elements
cout<<"\n The map has "<< wordFrequencyMap.size() << " elements";
// Calls the function to display each word, its frequency and bar chart
showData();
}// End of if condition
return 0;
}// End of main function

Sample Output:

FrequencyWordUsingMap.txt file contents

some people think cars they own is extension of their personality
somehow the idea that cars define people is very materialistic for some
for some people cars are just a way of transportation from point a to b
I like cars
some people like to collect old cars as a hobby
I guess one needs to be rich to have such a hobby
for some people cars are bad because gasoline pollutes environment
do you like cars