public int ProcessCalculations(List <string> numbers, List <string> operations)
{
var counter = numbers.Count;
int results = NumberGenerator.GetInteger(numbers[0]);
Calculator calculator = new Calculator();
AddOperator addOperator = new AddOperator();
SubtractOperator subtractOperator = new SubtractOperator();
for (int i = 1; i < counter; i++)
{
if (addOperator.IsPermitedAlias(operations[i - 1]))
{
results = calculator.Add(results, NumberGenerator.GetInteger(numbers[i]));
}
else if (subtractOperator.IsPermitedAlias(operations[i - 1]))
{
results = calculator.Subtract(results, NumberGenerator.GetInteger(numbers[i]));
}
else
{
results = 0;
}
}
return(results);
}
