public void MultiplicationExpressionEvaluatesDifferenceOfComplexDecimalExpression()
{
// 2 * x - 7 + x * 10
IExpression two = new Constant(2);
IExpression x = new VariableX();
IExpression seven = new Constant(7);
IExpression ten = new Constant(10);
IExpression result = new MultiplyExpression(two, x);
result = new SubtractionExpression(result, seven);
result = new SumExpression(result, x);
result = new MultiplyExpression(result, ten);
Context c = new Context(0.5);
var y = result.Interpret(c);
Assert.AreEqual(-55, y, 1e-10);
c = new Context(1.5);
y = result.Interpret(c);
Assert.AreEqual(-25, y, 1e-10);
}
public void MultiplicationExpressionEvaluatesDifferenceOf2Constants()
{
IExpression leftConstant = new Constant(4);
IExpression rightConstant = new Constant(6);
IExpression difference = new MultiplyExpression(leftConstant, rightConstant);
Context context = new Context(0);
var result = difference.Interpret(context);
Assert.AreEqual(24, result, 1e-10);
}
public static void Main(string[] args)
{
Context context = new Context();
// define set of variables
Complex x = new Complex(15, 9);
Complex y = new Complex(5, 3);
// add variables to context
context.SetVariable("x", x);
context.SetVariable("y", y);
// Object to calcute sum
IExpression additionExpression = new AddExpression(new NumberExpresssion("x"), new NumberExpresssion("y"));
Complex sum = additionExpression.Interpret(context);
Console.WriteLine(sum);
// Object to calcute difference
IExpression substractionExpression = new SubtractExpression(new NumberExpresssion("x"), new NumberExpresssion("y"));
Complex difference = substractionExpression.Interpret(context);
Console.WriteLine(difference);
// Object to calculate product
IExpression multiplicationExpression = new MultiplyExpression(new NumberExpresssion("x"), new NumberExpresssion("y"));
Complex product = multiplicationExpression.Interpret(context);
Console.WriteLine(product);
// Object to calculate quotient
IExpression divisionExpression = new DivideExspression(new NumberExpresssion("x"), new NumberExpresssion("y"));
Complex quotient = divisionExpression.Interpret(context);
Console.WriteLine(quotient);
Console.Read();
}
