/*

Name: Currency Conversion

Copyright: Copyright 2007 by Chris Gountanis student of University of Phoenix.

Author: Chris Gountanis

Date: 09/25/07

Description: Currency Conversion assignment for weeks 4 and 5.

*/

//INCLUDES

#include <iostream>

#include <iomanip>

//NAMESPACE DEFINITION

using namespace std;

//DEFINE RATES FOR EASY UPDATES IF NEEDED AS RATES CHANGE

#define Canadian_Dollars_Rate 0.99970009;

#define Euros_Rate 0.710378632;

#define Swiss_Francs_Rate 1.17250064;

#define British_Pounds_Rate 0.496598302;

#define Russian_Rubles_Rate 25.0620285;

//CUSTOM FUNCTION FOR CHECKING VALID CURRENCY AMOUNT

int isCurrency(char sAmount[]) {

int x = 0;

int iPointControl = 0;

int iReturn = 0;

//LOOP ENTIRE STRING TILL EOF CHECKING FOR NUMERIC AND ONLY ONE DECIMAL

while (sAmount[x] != '\0') {

if (isdigit(sAmount[x])) {

iReturn = 1;

} else {

//IF MORE THAN 1 DECIMAL PLACE RETURN FALSE

if ((sAmount[x] == '.') && (iPointControl < 1)) {

iPointControl++;

} else {

iReturn = 0;

break;

}

}

x++ ;

}

return iReturn;

}

void mycalc() {

//SETUP VARIABLES

const int input_max = 11;

char inputbuffer[input_max] = {0};

int storeid = 0;

int myswitch = 0;

double cashamount = 0;

double totalamount = 0;

system("CLS"); //CLEAR SCREEN

cout << "Welcome to Currency Conversion\n";

//GET AMOUNT LOOP UNTIL VALID

myswitch = 0;

while (myswitch == 0) {

cout << "\nENTER CASH AMOUNT: \n>$";

cin.getline(inputbuffer, input_max);

if(cin.fail()) { // IF LIMIT WAS EXCEEDED RESET CIN AND REMOVE LINE RETURN

cin.clear();

cin.ignore(INT_MAX, '\n');;

}

//CHECK FOR VALID NUMERIC/CURRENCY FORMAT BY CALLING CUSTOM FUNCTION

if (isCurrency(inputbuffer)) {

cashamount = atof(inputbuffer); //CONVERT CHAR TO FLOAT/DOUBLE WITH ATOF

myswitch = 1;

} else {

system("CLS"); //CLEAR SCREEN

cout << "Please enter a valid numeric value!\n\n" ;

}

}

//GET STORE LOOP UNTIL VALID

system("CLS"); //CLEAR SCREEN

myswitch = 0;

while (myswitch == 0) {

//PRINT NUMBERED STORE MENU

cout << "[1].\tCanadian Dollars\n"

<< "[2].\tEuros\n"

<< "[3].\tSwiss Francs\n"

<< "[4].\tBritish Pounds\n"

<< "[5].\tRussian Rubles\n"

<< "CHOOSE A CURRENCY (1-5):\n>";

//REQUEST STORE NUMBER BASED ON MENU

cin.getline(inputbuffer, input_max);

if(cin.fail()) { // IF LIMIT WAS EXCEEDED RESET CIN AND REMOVE LINE RETURN

cin.clear();

cin.ignore(INT_MAX, '\n');

}

//CHECK FOR NUMERIC

if (isdigit(inputbuffer[0])) {

storeid = atoi(inputbuffer); //CONVERT CHAR TO INTEGER WITH ATOI

//CHECK FOR 1,2 or 3 ONLY

if ((storeid >= 1) && (storeid <= 5)) {

myswitch = 1;

} else {

system("CLS"); //CLEAR SCREEN

cout << "Please enter a valid option number!\n";

}

} else {

system("CLS"); //CLEAR SCREEN

cout << "Please enter a numeric value only!\n";

}

}

//DEPENDING ON STOREID RUN THE MATH FOR TOTAL CALCULATION

switch (storeid) {

case 1: //CANADIAN DOLLARS

totalamount = cashamount * Canadian_Dollars_Rate;

break;

case 2: //EUROS

totalamount = cashamount * Euros_Rate;

break;

case 3: //SWISS FRANCS

totalamount = cashamount * Swiss_Francs_Rate;

break;

case 4: //BRITSH POUNDS

totalamount = cashamount * British_Pounds_Rate;

break;

case 5: //RUSSIAN RUBLES

totalamount = cashamount * Russian_Rubles_Rate;

break;

}

system("CLS"); //CLEAR SCREEN

//PRINT TOTAL WITH CURRENCY BASED DECIMAL PLACE

cout << "USD TOTAL: $" << setiosflags(ios::fixed) << setprecision(2) << totalamount << endl<< endl;

}

void main() {

mycalc(); //RUN MAIN CODE

//WAIT FOR USER TO PRESS ENTER

cout << "\nPress ENTER to continue.\n";

cin.get();

}