Question

I need help building a program on microsoft visual studio using c++ language.

implement a program called "charword_freq.cpp" to determine the number of words and the number of occurrences of each letter in a block of text stored in a data file called “mytext.dat”. Define a word to be any string of letters that is delimited at each end by either whitespace, a period, a comma, or the beginning or end of a line. You can assume that the input consists entirely of letters, whitespace, commas and periods. When outputting the number of words and letters that occur in a line, be sure to count upper- and lowercase versions of a letter as the same letter. Output the letters in alphabetical order and list only those letters that do occur in the input data file.

Consider the following example:

Block of text in the data file:

hello world ALL is great. HELLO WORLD ALL IS GREAT. hellO worlD alL iS great.

Output of your program to the screen:

15 words

6 a

3 d

6 e

3 g

3 h

3 i

15 l

6 o

6 r

3 s

3 t

3 w

Your program should be modular, meaning that you should break it up into smaller function(s). Your main program should be as small as possible and well documented.

Use data file: mytext.dat

hello world ALL is great. HELLO WORLD ALL IS GREAT. hellO worlD alL iS great.

Answer 1

Program:

// charword_freq.cpp.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include<iostream>
#include<fstream>

using namespace std;

int main()
{
   ifstream fin;
   fin.open("mytext.dat");

   int count[26] = {0}, i, wc = 1;
   char ch;

   while(fin)
   {
       //read a character from file with no skip whitespace
       fin>>noskipws>>ch;

//count number of words
       if(ch==' ') wc++;

       //count number of letters
       if(ch>='a' && ch <='z')
       {
           i = ch - 'a';
       }
       else if(ch>='A' && ch <='Z')
       {
           i = ch - 'A';
       }
       //skip for other characters
       else continue;

       count[i]++;
   }

//print the number of words
   cout<<wc<<" words"<<endl;
   //print number of letters
   for(i=0; i<26; i++)
   {
   if(count[i]!=0)
cout<<count[i]<<"\t"<<char(i+'a')<<endl;
   }

   getchar();

   return 0;
}

Output:

N.B. Whether you face any problem then share with me in the comment section, I'll happy to help you. I expect positive feedback from your end.