VowelCounter.cpp

/*
 * Write a C++ program that reads a word from the user into a C string and 
 * reports the number of vowels in the word.Then the program should read a
 * whole line of text from the user into a string class variable and report
 * the number of vowels in the whole line.
 *
 * For credit, give your instructor a line - by - line walkthrough of your
 * code explaining how it works.Be prepared to modify your program to alter
 * the algorithm in some way.
 * 
 * For extra credit try using a vector of characters and / or highlighting
 * the vowels with an asterisk on either side or something like that.
 *
 * Student: Brian Teachman ([email protected])
 * Date:    8/15/2016
 * Class:   CS& 131: Computer Science I C++
 */
#include "stdafx.h" // msvs specific
#include <iostream>
#include <string>
#include <vector>

using namespace std;

void runProgram(void);
// TODO: input validation needed

string getOneWord(void);

string getOneLine(void);

bool isVowel(char letter);

int countVowels(string input);

string wrapVowels(string input);

int main()
{
    runProgram();
    return 0;
}

void runProgram(void)
{
    bool done = false;
    while (!done)
    {
        string console_input;
        int menu_option;

        cout << "Enter an option:" << endl;
        cout << endl;
        cout << "  1) Enter one word" << endl;
        cout << "  2) Enter a sentence" << endl;
        cout << "  3) Exit Program" << endl;
        cout << endl;
        cin >> menu_option;
        //TODO: validate menu_option
        switch (menu_option)
        {
            case 1:
                console_input = getOneWord();
                //TODO: validate console_input
                cout << "Counted " << countVowels(console_input) << " vowels: "
                     << wrapVowels(console_input) << endl;
                break;
            case 2:
                cin.ignore(); // removes rest of line upto the newline '\n'
                console_input = getOneLine();
                //TODO: validate console_input
                cout << "Counted " << countVowels(console_input) << " vowels: "
                     << wrapVowels(console_input) << endl;
                break;
            case 3:
                done = true;
                break;
            default:
                cout << "Please enter a valid selection. ";
                system("pause"); //msvs specific
                runProgram();
                break;
        }
        cout << endl;
    }
}

bool isVowel(char letter)
{
    bool is_found = false;
    vector<char> vowelList = { 'a', 'e', 'i', 'o', 'u', 'y' };
    for (char vowel : vowelList)
    {
        if (letter == vowel || letter == toupper(vowel))
        {
            is_found = true;
        }
    }
    return is_found;
}

int countVowels(string inputString)
{
    int count = 0;
    for (char letter: inputString)
    {
        if (isVowel(letter)) count++;
    }
    return count;
}

string wrapVowels(string inputString)
{
    string wrappedString  = "";
    for (char letter: inputString)
    {
        bool found = isVowel(letter) ? true: false;
        if (found)
        {
            wrappedString.push_back('[');
            wrappedString.push_back(letter);
            wrappedString.push_back(']');
        }
        else
        {
            wrappedString.push_back(letter);
        }
    }
    return wrappedString;
}

string getOneWord()
{
    string word;
    cout << "Please enter one word: ";
    cin >> word;
    cout << endl;
    return word;
}

string getOneLine()
{
    string line;
    cout << "Please enter a line of text (press enter when your done):" << endl
         << "---------------------------------------------------------" << endl
         << endl;
    getline(cin, line);
    return line;
}