public string Calculator(string opration)
{
try
{
_operation.InterpretInput(opration);
switch (Operands_Singleton.Instance.currentOperator)
{
case "a":
_operation = new Add();
break;
case "s":
_operation = new Subtraction();
break;
case "d":
_operation = new Division();
break;
case "m":
_operation = new Multiplication();
break;
default:
break;
}
_operation.op1 = Operands_Singleton.Instance.operand1;
_operation.op2 = Operands_Singleton.Instance.operand2;
var res = _operation.CalculateResult().ToString();
return(res);
}
catch (Exception ex)
{
return("");
}
}
