/*******************************************************/
// R.A. Hillyard
// funDevelopProcess1.cpp
// October 2001
//
// Program to illustrate program development process using
// functions, stubs and drivers.
//
// The program will print a menu of choices (tasks) and call a
// function that will accomplish the task the user has chosen.
//
// We will need a function to print the menu, and one function for each task.
// For this example we will use three tasks - find the minimun of two integers,
// find the maximum of two doubles, or print a character to the screen "n" times.
//
// The first stage gives the function prototypes and implements the function to print the menu.
// At yhis point, the main program is written to test the printMenu function
// and is called a driver program.
//
// When we have the menu working and have tested all input combinations
// we are ready for phase 2
/*******************************************************/

#include<iostream>

using namespace std;

//function prototypes
char printMenu();      //print menu of choices
//pre condition : none
//post condition: will return an upper case char indicating the users choice

int min(int a, int b);          //returns min of a and b
//pre condition : variables a and b will contain a valid integers
//post condition: will return the smallest of a and b

double max(double x, double y);//returns max of x and y
//pre condition : variables x and y will contain a valid doubles
//post condition: will return the largest of x and y

void printLine(char ch, int count);
//pre condition : variable ch will contain a printable character
//              : variables count will contain a valid integers
//post condition: count ch's will be printed to the screen

int main()
  {
  char choice;             //for user choice

  while(true)              //run program until user chooses to quit
    {
    choice = printMenu();

    if(choice == 'Q')      //break out of program to quit
      break;
    else                   //verify printMenu function returns a value
      {
      cout << "User choice is: "<< choice << endl;
      }
    }//end while true

  return 0;
  }//end main

/*******************************************************/
// printMenu - prints the menu of choices checks for valid input and 
// returns the upper case version of the user choice as a char variable
/*******************************************************/
char printMenu()
  {
  char ch;  //this variable is local to the function

  do
    {
    cout << "\nWelcome to Function Developmen\n";
    cout << "------------------------------------\n";
    cout << "Choose one of the following\n";
    cout << "  M Find the smaller of two ints\n";
    cout << "  X Find the largest of two doubles\n";
    cout << "  P Print a Number of Characters\n";
    cout << "  Q To quit\n\n";
    cout << "Enter your choice: ";
    cin >> ch;
    ch = toupper(ch);
    }while(ch != 'M' && ch != 'X' && ch != 'P' && ch != 'Q'); 
  
  return ch;   
  }
/********************Program output*****************

Welcome to Function Developmen
------------------------------------
Choose one of the following
  M Find the smaller of two ints
  X Find the largest of two doubles
  P Print a Number of Characters
  Q To quit

Enter your choice: M
User choice is: M

Welcome to Function Developmen
------------------------------------
Choose one of the following
  M Find the smaller of two ints
  X Find the largest of two doubles
  P Print a Number of Characters
  Q To quit

Enter your choice: x
User choice is: X

Welcome to Function Developmen
------------------------------------
Choose one of the following
  M Find the smaller of two ints
  X Find the largest of two doubles
  P Print a Number of Characters
  Q To quit

Enter your choice: f

Welcome to Function Developmen
------------------------------------
Choose one of the following
  M Find the smaller of two ints
  X Find the largest of two doubles
  P Print a Number of Characters
  Q To quit

Enter your choice: Q
*/