static void Main(string[] args)
{
List <NormalVatNumber> normals = new List <NormalVatNumber>
{
new NormalVatNumber
{
Code = "123",
Bills = new List <decimal> {
1000, 700, 300
},
Expenses = new List <decimal> {
400, 500, 100
},
},
new NormalVatNumber
{
Code = "124",
Bills = new List <decimal>(),
Expenses = new List <decimal> {
100, 50
},
},
};
List <SimpleVatNumber> simples = new List <SimpleVatNumber>
{
new SimpleVatNumber
{
Code = "125",
Bills = new List <decimal> {
},
},
new SimpleVatNumber
{
Code = "126",
Bills = new List <decimal> {
500
},
},
new SimpleVatNumber
{
Code = "127",
Bills = new List <decimal> {
100, 100, 100, 200, 500, 200
},
},
};
Console.WriteLine("*** VAT Numbers Management System ***");
while (true)
{
Console.WriteLine();
Console.WriteLine("Available options:");
Console.WriteLine("Add a bill to a VAT number (1)");
Console.WriteLine("Add an expense to a VAT number (2)");
Console.WriteLine("Show data about a VAT number (3)");
Console.WriteLine("List all the VAT numbers (4)");
Console.Write("What do you want to do? ");
// READ A VALID OPTION
string option;
while (true)
{
option = Console.ReadLine();
if (option == "1" || option == "2" || option == "3" || option == "4")
{
break;
}
Console.Write("The entered value is not valid. Re-enter: ");
}
switch (option)
{
case "1":
{
Console.Write("Enter a VAT number: ");
string inputCode = Console.ReadLine();
// LOOK IN NORMALS
NormalVatNumber selectedNormal = null;
foreach (NormalVatNumber vn in normals)
{
if (vn.Code == inputCode)
{
selectedNormal = vn;
break;
}
}
// FOUND A NORMAL VAT
if (selectedNormal != null)
{
Console.Write("Enter the value of the bill: ");
decimal newBill;
while (true)
{
if (decimal.TryParse(Console.ReadLine(), out newBill))
{
break;
}
Console.Write("Invalid value. Re-enter: ");
}
selectedNormal.Bills.Add(newBill);
}
// LOOK FOR A SIMPLE VAT
else
{
// LOOK INTO SIMPLES
SimpleVatNumber selectedSimple = null;
foreach (SimpleVatNumber vn in simples)
{
if (vn.Code == inputCode)
{
selectedSimple = vn;
break;
}
}
// FOUND A SIMPLE VAT
if (selectedSimple != null)
{
Console.Write("Enter the value of the bill: ");
decimal newBill;
while (true)
{
if (decimal.TryParse(Console.ReadLine(), out newBill))
{
break;
}
Console.Write("Invalid value. Re-enter: ");
}
selectedSimple.Bills.Add(newBill);
}
// VAT NUMBER NOT FOUND
else
{
Console.WriteLine("The entered VAT number does not exist!");
}
}
break;
}
case "2":
{
Console.Write("Enter a VAT number: ");
string inputCode = Console.ReadLine();
// LOOK IN NORMALS
NormalVatNumber selectedNormal = null;
foreach (NormalVatNumber vn in normals)
{
if (vn.Code == inputCode)
{
selectedNormal = vn;
break;
}
}
// FOUND A NORMAL VAT
if (selectedNormal != null)
{
Console.Write("Enter the value of the expense: ");
decimal newExpense;
while (true)
{
if (decimal.TryParse(Console.ReadLine(), out newExpense))
{
break;
}
Console.Write("Invalid value. Re-enter: ");
}
selectedNormal.Expenses.Add(newExpense);
}
// LOOK FOR A SIMPLE VAT
else
{
// LOOK INTO SIMPLES
SimpleVatNumber selectedSimple = null;
foreach (SimpleVatNumber vn in simples)
{
if (vn.Code == inputCode)
{
selectedSimple = vn;
break;
}
}
// FOUND A SIMPLE VAT
if (selectedSimple != null)
{
Console.WriteLine("The selected VAT number is of type 'simple' and does not allow expenses");
}
// VAT NUMBER NOT FOUND
else
{
Console.WriteLine("The entered VAT number does not exist!");
}
}
break;
}
case "3":
{
Console.Write("Enter a VAT number: ");
string inputCode = Console.ReadLine();
// LOOK IN NORMALS
NormalVatNumber selectedNormal = null;
foreach (NormalVatNumber vn in normals)
{
if (vn.Code == inputCode)
{
selectedNormal = vn;
break;
}
}
// FOUND A NORMAL VAT
if (selectedNormal != null)
{
decimal billTotal = 0M;
foreach (decimal bill in selectedNormal.Bills)
{
billTotal += bill;
}
decimal expenseTotal = 0M;
foreach (decimal expense in selectedNormal.Expenses)
{
expenseTotal += expense;
}
decimal profit = billTotal - expenseTotal;
if (profit > 0)
{
decimal iva = profit * IVA_PERCENTAGE / 100;
decimal profitWithoutIva = profit - iva;
decimal irpef = profitWithoutIva * IRPEF_PERCENTAGE / 100;
decimal net = profitWithoutIva - irpef;
decimal taxTotal = iva + irpef;
Console.WriteLine($"Total net gain: {net}; total taxes: {taxTotal}");
}
else
{
Console.WriteLine($"Profit: {profit}; total taxes: 0");
}
}
// LOOK FOR A SIMPLE VAT
else
{
// LOOK INTO SIMPLES
SimpleVatNumber selectedSimple = null;
foreach (SimpleVatNumber vn in simples)
{
if (vn.Code == inputCode)
{
selectedSimple = vn;
break;
}
}
// FOUND A SIMPLE VAT
if (selectedSimple != null)
{
decimal billTotal = 0M;
foreach (decimal bill in selectedSimple.Bills)
{
billTotal += bill;
}
decimal profit = billTotal;
if (profit > 0)
{
decimal taxable = profit * SIMPLE_TAXABLE_PERCENTAGE / 100;
decimal taxes = taxable * SIMPLE_TAX_PERCENTAGE / 100;
decimal net = profit - taxes;
Console.WriteLine($"Net gain: {net}; total taxation: {taxes}");
}
else
{
Console.WriteLine($"Profit: {profit}");
}
}
// VAT NUMBER NOT FOUND
else
{
Console.WriteLine("The entered VAT number does not exist!");
}
}
break;
}
case "4":
{
foreach (NormalVatNumber vn in normals)
{
Console.WriteLine(vn.Code);
}
foreach (SimpleVatNumber vn in simples)
{
Console.WriteLine(vn.Code);
}
break;
}
default:
{
throw new InvalidOperationException();
}
}
}
}
static void Main(string[] args)
{
List <NormalVatNumber> normals = CreateNormalMocks();
List <SimpleVatNumber> simples = CreateSimpleMocks();
Console.WriteLine("*** VAT Numbers Management System ***");
while (true)
{
Menu();
// READ A VALID OPTION
switch (Option())
{
case "1":
{
// LOOK IN NORMALS
NormalVatNumber selectedNormal = null;
foreach (NormalVatNumber vn in normals)
{
if (vn.Code == Input())
{
selectedNormal = vn;
break;
}
}
// FOUND A NORMAL VAT
if (selectedNormal != null)
{
Console.Write("Enter the value of the bill: ");
decimal newBill;
while (true)
{
if (decimal.TryParse(Console.ReadLine(), out newBill))
{
break;
}
Console.Write("Invalid value. Re-enter: ");
}
selectedNormal.Bills.Add(newBill);
}
// LOOK FOR A SIMPLE VAT
else
{
// LOOK INTO SIMPLES
SimpleVatNumber selectedSimple = null;
foreach (SimpleVatNumber vn in simples)
{
if (vn.Code == Input())
{
selectedSimple = vn;
break;
}
}
// FOUND A SIMPLE VAT
if (selectedSimple != null)
{
Console.Write("Enter the value of the bill: ");
decimal newBill;
while (true)
{
if (decimal.TryParse(Console.ReadLine(), out newBill))
{
break;
}
Console.Write("Invalid value. Re-enter: ");
}
selectedSimple.Bills.Add(newBill);
}
// VAT NUMBER NOT FOUND
else
{
Console.WriteLine("The entered VAT number does not exist!");
}
}
break;
}
case "2":
{
// LOOK IN NORMALS
NormalVatNumber selectedNormal = null;
foreach (NormalVatNumber vn in normals)
{
if (vn.Code == Input())
{
selectedNormal = vn;
break;
}
}
// FOUND A NORMAL VAT
if (selectedNormal != null)
{
Console.Write("Enter the value of the expense: ");
decimal newExpense;
while (true)
{
if (decimal.TryParse(Console.ReadLine(), out newExpense))
{
break;
}
Console.Write("Invalid value. Re-enter: ");
}
selectedNormal.Expenses.Add(newExpense);
}
// LOOK FOR A SIMPLE VAT
else
{
// LOOK INTO SIMPLES
SimpleVatNumber selectedSimple = null;
foreach (SimpleVatNumber vn in simples)
{
if (vn.Code == Input())
{
selectedSimple = vn;
break;
}
}
// FOUND A SIMPLE VAT
if (selectedSimple != null)
{
Console.WriteLine("The selected VAT number is of type 'simple' and does not allow expenses");
}
// VAT NUMBER NOT FOUND
else
{
Console.WriteLine("The entered VAT number does not exist!");
}
}
break;
}
case "3":
{
// LOOK IN NORMALS
NormalVatNumber selectedNormal = null;
foreach (NormalVatNumber vn in normals)
{
if (vn.Code == Input())
{
selectedNormal = vn;
break;
}
}
// FOUND A NORMAL VAT
if (selectedNormal != null)
{
decimal billTotal = 0M;
foreach (decimal bill in selectedNormal.Bills)
{
billTotal += bill;
}
decimal expenseTotal = 0M;
foreach (decimal expense in selectedNormal.Expenses)
{
expenseTotal += expense;
}
decimal profit = billTotal - expenseTotal;
if (profit > 0)
{
decimal iva = profit * IVA_PERCENTAGE / 100;
decimal profitWithoutIva = profit - iva;
decimal irpef = profitWithoutIva * IRPEF_PERCENTAGE / 100;
decimal net = profitWithoutIva - irpef;
decimal taxTotal = iva + irpef;
Console.WriteLine($"Total net gain: {net}; total taxes: {taxTotal}");
}
else
{
Console.WriteLine("Profit: {profit}; total taxes: 0");
}
}
// LOOK FOR A SIMPLE VAT
else
{
// LOOK INTO SIMPLES
SimpleVatNumber selectedSimple = null;
foreach (SimpleVatNumber vn in simples)
{
if (vn.Code == Input())
{
selectedSimple = vn;
break;
}
}
// FOUND A SIMPLE VAT
if (selectedSimple != null)
{
decimal billTotal = 0M;
foreach (decimal bill in selectedSimple.Bills)
{
billTotal += bill;
}
decimal profit = billTotal;
if (profit > 0)
{
decimal taxable = profit * SIMPLE_TAXABLE_PERCENTAGE / 100;
decimal taxes = taxable * SIMPLE_TAX_PERCENTAGE / 100;
decimal net = profit - taxes;
Console.WriteLine($"Net gain: {net}; total taxation: {taxes}");
}
else
{
Console.WriteLine($"Profit: {profit}");
}
}
// VAT NUMBER NOT FOUND
else
{
Console.WriteLine("The entered VAT number does not exist!");
}
}
break;
}
case "4":
{
foreach (NormalVatNumber vn in normals)
{
Console.WriteLine(vn.Code);
}
foreach (SimpleVatNumber vn in simples)
{
Console.WriteLine(vn.Code);
}
break;
}
default:
{
throw new InvalidOperationException();
}
}
}
}