Objective: Write void functions, value-returning functions, Boolean functions, u

Question

Objective: Write void functions, value-returning functions, Boolean functions, using cin.get method, if statements, and loops.

Write a C++ program that counts the number of vowels in a text. The program should start by asking the user enter lines of characters terminated by a ‘!’. The program should output the number of vowels. Continue processing lines of characters until the user decides to quit (e.g. ask a y/n question).

For this assignment you must use cin.get() to read a single character. For example, cin.get(ch);

Will read a character from the keyboard and stores it in ch.

Write functions to do each of the following (Required): • A function that return true if a character is a vowel false otherwise. • A function that prints the results.

Note: programs that do not use functions will not be accepted and will get zero points.

Extra credit• Write a function that returns true if a character is a consonant. • Write a function that returns true if a character is a white space. • output the results in the same output function defined above.

Sample input/output: Enter lines of characters terminated by !. A single line of characters. ! There are 9 vowels in the text. Continue (y/n)? y

Explanation / Answer

#include<iostream>
using namespace std;

bool isVowel(char c){
   if(c=='a'||c=='A'||c=='e'||c=='E'||c=='i'||c=='I'||c=='o'||c=='O'||c=='u'||c=='U') {
return true;
}
else {
return false;
}
}

bool isConstant(char c){
   if(!isVowel(c) && ((c>='a' && c<='z')||(c>='A' && c<='Z')))
       return true;
   else
       return false;
   }
bool isSpace(char c){
   if(c == ' ')
       return true;
   else return false;
   }

void printResult(int count){
   cout<<"There are "<<count<<" vowels in the text. Continue (y/n)?"<<endl;
   }
int main(){
char c,ch='y';
int count = 0;
cout << "Enter lines of characters terminated by !" << endl;
do{
           cout<<"A single line of characters !"<<endl;
           c = cin.get();
           for(;c != '!';)
           {
               if(isVowel(c))
                   count++;
               c = cin.get();
           }
           printResult(count);
           cin>>ch;
   }while(ch == 'y');
  
return 0;
}

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