private Expression HandleExpressionWithOperation(string expression)
{
Expression exp = new ValueExpression(0);
var characters = expression.ToCharArray();
for (var i = 0; i < characters.Length; i++)
{
var exp1 = expression.Substring(0, i);
var exp2 = expression.Substring(i + 1);
switch (characters[i])
{
case '+':
exp = new AddExpression(ChangeStrToExpression(exp1), ChangeStrToExpression(exp2));
break;
case '-':
exp = new SubtractionExpression(ChangeStrToExpression(exp1), ChangeStrToExpression(exp2));
break;
default:
break;
}
}
return(exp);
}
private static void CalculateWithoutEncapulate()
{
//10+5=15
Expression addExpression = new AddExpression(new ValueExpression(10), new ValueExpression(5));
//15-8=7
Expression subExpression = new SubtractionExpression(addExpression, new ValueExpression(8));
//15+7=22
addExpression = new AddExpression(addExpression, subExpression);
Console.WriteLine(addExpression.Interpreter());
}