Question

Develop a C++ program that reads a paragraph of text from a file. Tokenizes it such that each token is a word, determines whether a token is a palindrome (that is a word that reads the same forward and backward such as ‘madam’ or ‘1991’). Prints all palindrome and the total number of palindrome.Your source code shall consists at least three function apart from main(). Shows a program structure chart,flowchart,source code & output.

Answer 1

/*

C++ program that read an input file "DataFile.txt" . Then call the functions to check if the words in the file are palindromes. The program will display the list of the palindromes and then count the of the palindromes in the file on console output.
*/
#include <iostream>
#include<string>
#include <fstream>
#include <sstream>
using namespace std;
//function prototypes
string reverse(string &s);
bool isPalindrome(string word);
void displayPalindromCount(string whole_text);
int main()
{
   /*Create an object of ifstream class*/
   ifstream inFile;
   /*Open file for reading DataFile.txt file */
   inFile.open("DataFile.txt");

   if(!inFile)
   {
       cout<<"File is not found"<<endl;
       return EXIT_FAILURE;
   }

   /*Create a stringstream object*/
   stringstream strstream;
   /*Read total file data into streamstring object*/
   strstream << inFile.rdbuf();
   /*Convert the stringstream object to string*/
   string fileData = strstream.str();
   /*Call the function, displayPalindromCount with fileData */
   displayPalindromCount(fileData);

   //pause program output on console
   system("pause");
   return 0;
}
/*The function, displayPalindromCount that takes a string
as argument and then find and display all the palindrome
strings and display the number of palindrome strings are
found on console output.*/
void displayPalindromCount(string whole_text)
{
   int numPalindromes=0;
   string word;
   //read whole_text into stringstream object
   stringstream data(whole_text);

   cout<<"List of palindrome words from the file \n"<<endl;
/*Split the data into words by space */
   while(getline(data,word,' '))
   {
       //calling the funciton, isPalindrome
       if(isPalindrome(word))
       {
          /*print the palindrome word */
           cout<<(numPalindromes+1)<<"\t"<<word<<endl;
           //increment the numPalindromes by 1
           numPalindromes++;
       }
   }
   //print the numPalindromes on console output
   cout<<"\nNumber of palindrome : "<<numPalindromes<<endl;
}
/*The function isPalindrome that
takes a string word and return true
if the word is palindrom or returns false*/
bool isPalindrome(string word)
{
   string reverse_word=reverse(word);
   if(word==reverse_word)
       return true;
   else
       return false;
}
/*The function reverse that takes a string and
reverse the string and returns the reverse string*/
string reverse(string &s)
{
   string rev(s.rbegin(), s.rend());
   return rev;
}

Sample Input file data: FileData.txt

Lorem Ipsum is simply dummy text of the printing and typesetting industry.
Lorem Ipsum has been the industry's standard dummy text ever since
the 1500s, when an jasmine unknown printer took galley of type and scrambled
it to make type specimen madam book. It has survived 1991 not oyo only five ono centuries,
but also the leap into electronic typesetting, remaining essentially unchanged.

Sample Output: