public static double Calculate(string expr)
{
switch (expr)
{
case null:
throw new ArgumentNullException(nameof(expr));
case "":
return(0);
}
stack = new ClassLibrary.Stack <double>(10);
var entries = expr.Split(' ');
foreach (var entry in entries)
{
ProcessEntry(entry);
}
if (stack.Count != 1)
{
throw new ArgumentException("Invalid expression. Numbers > operations.");
}
return(stack.Pop());
}
static void Main(string[] args)
{
//Workflow
//var workflow = new ClassLibrary.Workflow(new List<ClassLibrary.IActivity>());
//workflow.Add(new ClassLibrary.ActivityUploadVideo());
//workflow.Add(new ClassLibrary.ActivityEncodeVideo());
//workflow.Add(new ClassLibrary.ActivityNotify());
//workflow.Add(new ClassLibrary.ActivityChangeStatus());
//var workflowEngine = new ClassLibrary.WorkflowEngine();
//workflowEngine.Run(workflow);
//Console.ReadKey();
//Connection
//ClassLibrary.DbConnection dbConnection = new ClassLibrary.OracleConnection("Connection string", new TimeSpan(0, 5, 0));
//ClassLibrary.DbCommand dbCommand = new ClassLibrary.DbCommand(dbConnection, "SELECT * FROM CLIENT;");
//dbCommand.Execute();
//Console.ReadKey();
// Stack
var stack = new ClassLibrary.Stack();
stack.Push("Hello World");
stack.Push(1);
stack.Push(15.69);
stack.Push(true);
stack.Push('e');
stack.PrintAll();
Console.WriteLine(stack.Pop().ToString());
Console.WriteLine(stack.Pop().ToString());
Console.WriteLine(stack.Pop().ToString());
Console.WriteLine(stack.Pop().ToString());
Console.WriteLine(stack.Pop().ToString());
Console.ReadKey();
//Stack Overflow post
//ClassLibrary.Post post = new ClassLibrary.Post("My New Post", "This is just a test to see how to post");
//var upvotes = 80;
//var downvotes = 20;
//for (int i = 0; i < upvotes; i++)
//{
// post.UpVote();
//}
//for (int i = 0; i < downvotes; i++)
//{
// post.DownVote();
//}
//Console.WriteLine("Title: " + post._Title);
//Console.WriteLine("Description: " + post._Description);
//Console.WriteLine("Creation date: " + post._CreationDate);
//Console.WriteLine("Upvotes: " + post.UpVotes);
//Console.WriteLine("Downvotes: " + post.DownVotes);
//Console.WriteLine("Votes: " + post.Votes);
//Console.ReadKey();
}
public override void PerformOperation(ClassLibrary.Stack <double> stack)
{
var first = stack.Pop();
var second = stack.Pop();
var res = second / first;
stack.Push(res);
}
public void Pop_EmptyStack_ThrowsException()
{
var Stack = new ClassLibrary.Stack();
Stack.Pop();
}
public void Push_NullObject_ThrowsException()
{
var Stack = new ClassLibrary.Stack();
Stack.Push(null);
}
public abstract void PerformOperation(ClassLibrary.Stack <double> stack);
