public void AddMoney(decimal cash) // adds cash to the balance
{
VendingWriter logWriter = new VendingWriter();
string transactionString = " FEED MONEY: $";
transactionString += cash;
balance = balance + cash;
transactionString = transactionString + " $" + balance;
logWriter.WritingAFile(transactionString);
}
public string ReturnChange() // Return change sets the vending machine's balance field to 0, and returns a string
// containing the coins they should receive back
{
VendingWriter vr = new VendingWriter();
string recordTransaction = ("GIVE CHANGE: $" + balance.ToString());
Change coins = new Change(balance);
balance = 0.00M;
recordTransaction += " $0.00";
vr.WritingAFile(recordTransaction);
return(coins.ToString());
}
public VendingItem BuyItem(string userSelection) // buys the item, reducing balance by the item's cost and
{ // reducing the relevant inventory item by one.
VendingItem product = inventory[userSelection][0];
decimal productCost = product.Cost;
if (balance >= productCost)
{
VendingWriter vr = new VendingWriter(); // writing to/formatting log
string recordTransaction = (inventory[userSelection][0].Name + " ");
recordTransaction += userSelection + " $" + balance + " ";
balance -= productCost;
recordTransaction += "$" + balance; // more writing to the log
vr.WritingAFile(recordTransaction);
inventory[userSelection].RemoveAt(0);
return(product);
}
return(null);
}
