public static void Main(string[] args)
{
Stack <String> wordStack = new Stack <String>();
wordStack.push("hello");
Console.WriteLine(wordStack.peek());
wordStack.pop();
}
public static bool MultiBracketValidation(string input)
{
Stack <char> bracketValidater = new Stack <char>();
if (input.Length == 0)
{
throw new Exception("Empty String.");
}
foreach (char character in input)
{
if (character == '(' || character == '[' || character == '{')
{
bracketValidater.Push(character);
}
switch (character)
{
case ')':
if (bracketValidater.IsEmpty())
{
return(false);
}
if (bracketValidater.peek() == '(')
{
bracketValidater.Pop();
}
break;
case ']':
if (bracketValidater.IsEmpty())
{
return(false);
}
if (bracketValidater.peek() == '[')
{
bracketValidater.Pop();
}
break;
case '}':
if (bracketValidater.IsEmpty())
{
return(false);
}
if (bracketValidater.peek() == '{')
{
bracketValidater.Pop();
}
break;
default:
break;
}
}
if (!bracketValidater.IsEmpty())
{
return(false);
}
return(true);
}
