public CartPurchasePolicy(int expectedQuantity, IArithmeticOperator @operator, string description)
{
Guid = Guid.NewGuid();
ExpectedQuantity = expectedQuantity;
Operator = @operator;
Description = description;
}
public CartDiscountPolicy(IArithmeticOperator @operator, double expectedSum, int discountpercentage, string description)
{
Guid = Guid.NewGuid();
ExpectedSum = expectedSum;
DiscountPercentage = discountpercentage;
Operator = @operator;
Description = description;
}
public ProductDiscountPolicy(Guid productGuid, IArithmeticOperator @operator, int expectedQuantitiy, int discountPercentage, string description)
{
Guid = Guid.NewGuid();
ProductGuid = productGuid;
Operator = @operator;
ExpectedQuantitiy = expectedQuantitiy;
DiscountPercentage = discountPercentage;
Description = description;
}
public ProductPurchasePolicy(Guid productGuid, IArithmeticOperator givenOperator, int expectedQuantity, string description)
{
Guid = Guid.NewGuid();
ProductGuid = productGuid;
Operator = givenOperator;
ExpectedQuantity = expectedQuantity;
Description = description;
}
public static double Calculate(List <string> input)
{
Stack <double> numbers = new Stack <double>();
double value = 0.0;
for (int i = 0; i < input.Count; i++)
{
if (input[i][0] >= '0' && input[i][0] <= '9')
{
numbers.Push(double.Parse(input[i]));
}
else if (OperationsCollection.Arithmetics.Contains(input[i]))
{
IArithmeticOperator arithmeticOperator = null;
value = numbers.Pop();
double secValue = numbers.Pop();
double result = 0.0;
switch (input[i])
{
case "+":
arithmeticOperator = new Plus();
result = arithmeticOperator.Calculate(secValue, value);
break;
case "-":
arithmeticOperator = new Minus();
result = (arithmeticOperator.Calculate(secValue, value));
break;
case "*":
arithmeticOperator = new Multiplication();
result = arithmeticOperator.Calculate(secValue, value);
break;
case "/":
arithmeticOperator = new Division();
result = arithmeticOperator.Calculate(secValue, value);
break;
case "%":
arithmeticOperator = new Remainder();
result = arithmeticOperator.Calculate(secValue, value);
break;
case "^":
arithmeticOperator = new Pow();
result = arithmeticOperator.Calculate(secValue, value);
break;;
}
numbers.Push(result);
}
else if (OperationsCollection.Functions.Contains(input[i]))
{
IFunctionOperator functionOperator = null;
value = numbers.Pop();
switch (input[i])
{
case "sin":
functionOperator = new Sin();
break;
case "cos":
functionOperator = new Cos();
break;
case "tang":
functionOperator = new Tang();
break;
case "cotang":
functionOperator = new CoTang();
break;
case "sqrt":
functionOperator = new Sqrt();
break;
case "ln":
numbers.Push(Math.Log(value));
break;
case "log":
numbers.Push(Math.Log10(value));
break;
}
if (functionOperator != null)
{
double result = functionOperator.Calculate(value);
numbers.Push(result);
}
}
}
return(numbers.Pop());
}