public void TestEvaluateTree()
{
string expression1 = "A1+B1+12+12";
ExpressionTree test1 = new ExpressionTree(expression1);
test1.CreateExpressionTree(expression1);
Assert.That(24, Is.EqualTo(test1.Evaluate()), "Failed at test1 (24)");
test1.SetVariable("A1", 12);
Assert.That(36, Is.EqualTo(test1.Evaluate()), "Failed at test1 (36)");
test1.SetVariable("B1", 12);
Assert.That(48, Is.EqualTo(test1.Evaluate()), "Failed at test1 (48)");
string expression2 = "World-7+8+8";
ExpressionTree test2 = new ExpressionTree(expression2);
test2.CreateExpressionTree(expression2);
Assert.That(9, Is.EqualTo(test2.Evaluate()), "Failed at test2 (9)");
test2.SetVariable("World", 12);
Assert.That(21, Is.EqualTo(test2.Evaluate()), "Failed at test2 (21)");
}
/// <summary>
/// This will print out the main menu and ask the user to input an expression and evaluate the expression
/// using the ExpressionTree class.
/// </summary>
public static void RunApplication()
{
int option = 0, exit = -1;
string expression = "A1-12-C1";
string name = string.Empty;
double value = 0;
ExpressionTree expTree = new ExpressionTree(expression);
while (exit == -1)
{
PrintMainMenu(expression);
option = GetOptionForMainMenu();
switch (option)
{
case 1:
System.Console.Write("Enter a new expression: ");
expression = System.Console.ReadLine();
break;
case 2:
System.Console.Write("Enter variable name: ");
name = System.Console.ReadLine();
System.Console.Write("Enter variable value: ");
value = Convert.ToDouble(System.Console.ReadLine());
expTree.SetVariable(name, value);
break;
case 3:
System.Console.Write("Evaluation of Tree: ");
expTree.CreateExpressionTree(expression);
System.Console.WriteLine(expTree.Evaluate());
break;
case 4:
System.Console.Write("Quit.");
exit = 1; // Leaves loop and ends application
break;
}
}
}