//Write a C++ program that inputs a letter and outputs the corresponding
//International Civil Aviation Organization alphabet word using functional
//decomposition.

#include <iostream>
#include <string>
using namespace std;

int main()
{
    cout<<"\t\tInternational Civil Aviation Organization Alphabet\n";
        
    //declare variables
    char letter;    //store user input
    char choice;    //store user choice to continue using program or exit the program.

    do        //start do loop for user multiple entries
    {
        //instructions for user input
        cout<<"Please enter a letter, (A thru Z), that you would like to convert"<< endl;
        cout<<"to an International Civil Aviation Organization alphabet word"<< endl;
        cout<<"and press enter\t"<<endl;
        cout<<"\n\n\t";

        cin>> letter;        //user input

        cout<<"\n\n";

            if (letter == 'A' || letter == 'a')
                cout<<"\nThe alphabet word is:  Alpha"<< endl;
            else
                if (letter == 'B' || letter == 'b')
            cout<<"\nThe alphabet word is:  Beta"<< endl;
            else
                if (letter == 'C' || letter == 'c')
                    cout<<"\nThe alphabet word is:  Charlie"<< endl;
            else
                if (letter == 'D' || letter == 'd')
                    cout<<"\nThe alphabet word is:  Delta"<< endl;
            else
                if (letter == 'E' || letter == 'e')
                    cout<<"\nThe alphabet word is:  Echo"<< endl;
            else
                if (letter == 'F' || letter == 'f')
                    cout<<"\nThe alphabet word is:  Foxtrot"<< endl;
            else
                if (letter == 'G' || letter == 'g')
                    cout<<"\nThe alphabet word is:  Golf"<< endl;
            else
                if (letter == 'H' || letter == 'h')
                    cout<<"\nThe alphabet word is:  Hotel"<< endl;
            else
                if (letter == 'I' || letter == 'i')
                    cout<<"\nThe alphabet word is:  India"<< endl;
            else
                if (letter == 'J' || letter == 'j')
                    cout<<"\nThe alphabet word is:  Juliet"<< endl;
            else
                if (letter == 'K' || letter == 'k')
                    cout<<"\nThe alphabet word is:  Kilo"<< endl;
            else
                if (letter == 'L' || letter == 'l')
                    cout<<"\nThe alphabet word is:  Lima"<< endl;
            else
                if (letter == 'M' || letter == 'm')
                    cout<<"\nThe alphabet word is:  Mike"<< endl;
            else
                if (letter == 'N' || letter == 'n')
                    cout<<"\nThe alphabet word is:  November"<< endl;
            else
                if (letter == 'O' || letter == 'o')
                    cout<<"\nThe alphabet word is:  Oscar"<< endl;
            else
                if (letter == 'P' || letter == 'p')
                    cout<<"\nThe alphabet word is:  Papa"<< endl;
            else
                if (letter == 'Q' || letter == 'q')
                    cout<<"\nThe alphabet word is:  Quebec"<< endl;
            else
                if (letter == 'R' || letter == 'r')
                cout<<"\nThe alphabet word is:  Romeo"<< endl;
            else
                if (letter == 'S' || letter == 's')
                    cout<<"\nThe alphabet word is:  Sierra"<< endl;
            else
                if (letter == 'T' || letter == 't')
                    cout<<"\nThe alphabet word is:  Tango"<< endl;
            else
                if (letter == 'U' || letter == 'u')
                    cout<<"\nThe alphabet word is:  Uniform"<< endl;
            else
                if (letter == 'V' || letter == 'v')
                    cout<<"\nThe alphabet word is:  Victor"<< endl;
            else
                if (letter == 'W' || letter == 'w')
                    cout<<"\nThe alphabet word is:  Whiskey"<< endl;
            else
                if (letter == 'X' || letter == 'x')
                    cout<<"\nThe alphabet word is:  X-Ray"<< endl;
            else
                if (letter == 'Y' || letter == 'y')
                    cout<<"\nThe alphabet word is:  Yankee"<< endl;
            else
                if (letter == 'Z' || letter == 'z')
                    cout<<"\nThe alphabet word is:  Zulu"<< endl;
            else
                cout<<"Invalid entry. Please enter one letter, A thru Z"<< endl;
            //endif;

            cout<<"\n\nWould you like to enter another letter?   (Y/N)\t";
            cin>> choice;
            cout<<"\n\n";
    }while (choice == 'Y' || choice == 'y');
    
    cout<<"\n\nThank you for trying my program\n\n";
    
    return 0;
}

        cin>> letter;        //user input

        string userInput;
        cin>> userInput;        //user input
        if (userInput.length () == 1)
            letter = userInput[0];    // user entered one character.  Assign to letter.
        else
            letter = '!';    // denotes bad input