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);
        }
Пример #2
0
        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());
        }