public override string ToString()
{
string result = Values[0].ToString();
for (int i = 0; i < Operators.Count; i++)
{
result += String.Format(" {0} {1}", OperatorExtensions.OperatorToString(Operators[i]), Values[i + 1].ToString());
}
return(result);
}
public const double INVALID_ANSWER = -9999; //I have a sneaking feeling that this is terrible programming practice.
/// <summary>
/// Calculate the answer of a problem with an arbitrary number of values and operations.
/// </summary>
/// <param name="vals">The values of the problem</param>
/// <param name="ops">The operators in the problem</param>
/// <returns></returns>
public static long CalcLong(List <long> vals, List <Operator> ops)
{
string equation = "";
equation += vals[0];
for (int i = 0; i < ops.Count; i++)
{
equation += OperatorExtensions.OperatorToString(ops[i]) + vals[i + 1];
}
double result = Convert.ToDouble(new DataTable().Compute(equation, null).ToString());
result = Math.Round(result, 0);
return((long)result);
}
/// <summary>
/// Calculate the answer of a problem with an arbitrary number of values and operations.
/// </summary>
/// <param name="vals">The values of the problem</param>
/// <param name="ops">The operators in the problem</param>
/// <returns>A double, rounded to 2 decimal places, representing the answer to this problem</returns>
public static double CalcDouble(List <long> vals, List <Operator> ops)
{
string equation = "";
double result = 0;
equation += vals[0];
for (int i = 0; i < ops.Count; i++)
{
equation += OperatorExtensions.OperatorToString(ops[i]) + vals[i + 1];
}
try
{
result = Convert.ToDouble((new DataTable().Compute(equation, null).ToString()));
}
catch (OverflowException)
{
return(INVALID_ANSWER);
}
result = Math.Round(result, 2);
return(result);
}