Question

Write a program in C plus plus that reads input a word at a time until a lone q is entered.The

program should then report the number of words that began with vowels, the num-
ber that began with consonants,and the number that fit neither of those categories.

One approach is to use isalpha() to discriminate between words beginning with

letters and those that don’t and then use an if or switch statement to further iden-
tify those passing the isalpha() test that begin with vowels.A sample run might

look like this:
Enter words (q to quit):
The 12 awesome oxen ambled
quietly across 15 meters of lawn. q
5 words beginning with vowels
4 words beginning with consonants
2 others

Answer 1

Program:

#include <iostream>
#include <string.h>

using namespace std;

int main()
{
   char pres, prev=' ', p_prev = ' ';
   int v_count = 0, c_count = 0, o_count = 0;
  
   cout << "\nEnter words(q to quit):" << endl;
  
   while( true )
   {
       pres = fgetc(stdin);
       if( prev == ' ' || prev == '\n' )
       {  
           if(isalpha(pres))
           {
                   if( pres=='a' || pres=='A' || pres=='e' || pres=='E' ||
                       pres=='i' || pres=='I' || pres=='o' || pres=='O' ||
                       pres=='u' || pres=='U')
                   {
                       v_count++;
                   }
                   else
                   {
                       c_count++;
                   }
           }
           else
           {
               o_count++;
           }
       }
       else
       {
           if((p_prev == ' '|| p_prev == '\n') && prev == 'q'
                 && (pres == ' '|| pres == '\n'))
           {
               c_count--;
                 break;          
           }
       }
       p_prev = prev;
       prev = pres;
   }
  
   cout<<v_count<<" words beginning with vowels\n";
   cout<<c_count<<" words beginning with consonants\n";
   cout<<o_count<<" others\n\n";
  
   return 1;
}

Execution and Output: