Thomas4.cpp

// Assignment 4 - COSC 1410
// TA: Can Cao
// Author: Micah Thomas
#include <iostream>
#include <iomanip>

using namespace std;

enum ExchType { BUY, SELL };                // ENUMERATION

int printMenu(double &rate);                // PRINTS MENU & RETURNS USER's CHOICE
int logic(int test, double &rate);         // CHOSES ACTION Based on test

double getBuyRate(double rate);             // RETURNS Profitable buy rate for peso
double getSellRate(double rate);            // RETURNS Profitable sell rate for peso

void setRate(double &rate);                 // SETS Rate to user input
void showRate(double rate);                 // PRINTS BUY & SELL multipliers based on rate

void exchange(ExchType exch, double amount, double rate); // PRINTS Exchange Amount

int main() {
  cout << "######## ##     ##  ######  ##     ##    ###    ##    ##  ######   ########" << endl
       << "##        ##   ##  ##    ## ##     ##   ## ##   ###   ## ##    ##  ##      " << endl
       << "##         ## ##   ##       ##     ##  ##   ##  ####  ## ##        ##      " << endl
       << "######      ###    ##       ######### ##     ## ## ## ## ##   #### ######  " << endl
       << "##         ## ##   ##       ##     ## ######### ##  #### ##    ##  ##      " << endl
       << "##        ##   ##  ##    ## ##     ## ##     ## ##   ### ##    ##  ##      " << endl
       << "######## ##     ##  ######  ##     ## ##     ## ##    ##  ######   ########" << endl
       << "===========================================================================" << endl;
  double exchrate = 13.3;
  int menu, loop;
  do {
    menu = printMenu(exchrate);
    cout << "\n====================================================";
    loop = logic(menu, exchrate);       // RETURNS 0 if user wants to exit; 0 to continue;
    cout << "\n====================================================\n";
    if (loop) {                         // IF user wants to exit, dont pause
      cout << "\nPress ENTER to continue";
      cin.get();
      cin.get();
    }
  } while (loop);
  return 0;
}

int printMenu(double &rate) {
  int choice;
  cout << fixed << setprecision(4)
       << "\n+--------------------------------------------------+"
       << "\n| CURRENCY EXCHANGE: Mexican Pesos <==> US Dollars |"
       << "\n+-------------------+--------------+---------------+"
       << "\n|                   | Buying Pesos | Selling Pesos |"
       << "\n+-------------------+--------------+---------------+"
       << "\n| $1 =              | " << setw(8) << getBuyRate(rate)
       << " MXN | " <<
       setw(9) << getSellRate(rate)
       << " MXN |"
       << "\n+-------------------+--------------+---------------+"
       << "\n| Select the option:                               |"
       << "\n| 1. Pesos to Dollars                              |"
       << "\n| 2. Dollars to Pesos                              |"
       << "\n| 3. Change Exchange Rate                          |"
       << "\n| 4. Show Exchange Rate                            |"
       << "\n| 5. Exit the program                              |"
       << "\n+--------------------------------------------------+"
       << "\n"
       << "\n>> "
       << fixed << setprecision(2);
  cin  >> choice;
  return choice;
}

int cont() {
  char ch;
  cout << "\n\nWould you like to continue? [Y/N]:";
  cin  >> ch;
  if ((ch == 'n') || (ch == 'N'))
    return 0;
  return 1;
}

int logic(int test, double &rate) {
  switch (test) {
      double amount;
    case 1:
      cout << "\nHow many Pesos would you like to Exchange? ";
      cin >> amount;
      exchange(SELL, amount, rate);
      return 1;
    case 2:
      cout << "\nHow many USD would you like to Exchange? ";
      cin >> amount;
      exchange(BUY, amount, rate);
      return 1;
    case 3:
      setRate(rate);
      return 1;
    case 4:
      showRate(rate);
      return 1;
    case 5:
      return 0;
    default:
      return 1;
  }
}

double getBuyRate(double rate) {
  return rate * .93;
}

double getSellRate(double rate) {
  return rate * 1.07;
}

void setRate(double &rate) {
  cout << "\nThe current rate is: " << rate
       << "\nWhat would you like to set the rate to? ";
  cin >> rate;
}

void showRate(double rate) {
  cout << "\nPesos => USD: " << getSellRate(rate)
       << "\nUSD => Pesos: " << getBuyRate(rate);
}

void exchange(ExchType exch, double amount, double rate) {
  if (exch == BUY) {
    cout << "\nYou will get " << amount *getBuyRate(rate) << " Pesos.";
  } else {
    cout << "\nYou will get " << amount / getSellRate(rate) << " USD.";
  }
}