A2/atmFunctions.cpp

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#include "atmFunctions.h"
#include <iomanip>
#include <iostream>
#include <limits>
/**
* @brief Normalizes dollar & cent amounts by converting any 100 cent chunks to
* dollars
*
* @param pDollars A pointer to the amount of dollars
* @param pCents A pointer to the amount of cents
*/
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void normalize_dollars(int *pDollars, int *pCents) {
*pDollars += *pCents / 100;
*pCents = *pCents % 100;
}
void start_atm() {
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int dollars = 0;
int cents = 0;
std::cout << "You have entered the ATM menu" << std::endl;
bool continuing = true;
char choice;
do {
print_menu();
choice = get_user_selection();
switch (choice) {
case '1':
print_balance(&dollars, &cents);
break;
case '2':
deposit_money(&dollars, &cents);
break;
case '3':
withdraw_money(&dollars, &cents);
break;
case 'Q':
continuing = false;
std::cout << "Have a nice day!" << std::endl;
break;
}
} while (continuing);
}
void print_menu() {
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std::cout << "Please make a selection:" << std::endl
<< "(1) Print Current Balance" << std::endl
<< "(2) Deposit" << std::endl
<< "(3) Withdraw" << std::endl
<< "(Q) Quit" << std::endl;
}
char get_user_selection() {
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char input = 'Q';
while (true) {
std::cout << "Choice: ";
std::cin >> input;
std::cin.clear();
std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
if (std::cin.fail() ||
!(input == '1' || input == '2' || input == '3' || input == 'Q')) {
std::cout << "Invalid choice, please try again" << std::endl;
} else {
std::cout << std::endl;
return input;
}
};
}
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void print_balance(int *pDollars, int *pCents) {
std::cout << "Your account currently contains a total of $" << *pDollars
<< "." << std::setfill('0') << std::setw(2) << *pCents << "."
<< std::endl
<< std::endl;
}
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void deposit_money(int *pDollars, int *pCents) {
// Prompt the user for the amount to deposit
int dollarsToDeposit = 0, centsToDeposit = 0;
std::cout << "How many dollars would you like to deposit? ";
std::cin >> dollarsToDeposit;
std::cout << "How many cents would you like to deposit? ";
std::cin >> centsToDeposit;
// Ensure valid positive integers were entered
if (dollarsToDeposit < 0 || centsToDeposit < 0) {
std::cout << "Deposits must be positive amounts, please try again with "
"proper values"
<< std::endl
<< std::endl;
return;
}
// Normalize the user-inputted values for later display
normalize_dollars(&dollarsToDeposit, &centsToDeposit);
*pDollars += dollarsToDeposit;
*pCents += centsToDeposit;
// Normalize the true account values after addition
normalize_dollars(pDollars, pCents);
// Display the amount deposited nicely
std::cout << "You have successfully deposited a total of $"
<< dollarsToDeposit << "." << std::setfill('0') << std::setw(2)
<< centsToDeposit << "." << std::endl
<< std::endl;
}
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void withdraw_money(int *pDollars, int *pCents) {
// Prompt the user for the amount to withdraw
int dollarsToWithdraw = 0, centsToWithdraw = 0;
std::cout << "How many dollars would you like to withdraw? ";
std::cin >> dollarsToWithdraw;
std::cout << "How many cents would you like to withdraw? ";
std::cin >> centsToWithdraw;
if (centsToWithdraw < 0 || dollarsToWithdraw < 0) {
std::cout
<< "Withdrawals must be positive amounts, please try again with "
"proper values"
<< std::endl
<< std::endl;
return;
}
normalize_dollars(&dollarsToWithdraw, &centsToWithdraw);
// Convert dollar amounts to cents for easier subtraction
int totalCentWithdrawal = centsToWithdraw + (dollarsToWithdraw * 100);
*pCents += *pDollars * 100;
*pDollars = 0;
if (totalCentWithdrawal > *pCents) {
std::cout << "You do not have enough money for this withdrawal"
<< std::endl
<< std::endl;
return;
}
*pCents -= totalCentWithdrawal;
normalize_dollars(pDollars, pCents);
std::cout << "You have successfully withdrawn a total of $"
<< dollarsToWithdraw << "." << std::setfill('0') << std::setw(2)
<< centsToWithdraw << "." << std::endl
<< std::endl;
}