public static bool CheckBrackets(string s)
{
string leftBracketString = "(";
char leftBracket = leftBracketString[0];
bool valid = true;
int count = 0;
MyStack <string> stack = new MyStack <string>();
foreach (char c in s)
{
if (c.Equals(leftBracket))
{
stack.Push(c.ToString());
count++;
}
else
{
if (!stack.IsEmpty())
{
if (stack.Top().Equals(leftBracketString))
{
stack.Pop();
count--;
}
else
{
valid = false;
}
}
else
{
valid = false;
}
}
}
if (count != 0)
{
valid = false;
}
return(valid);
}
static void Opgave3()
{
System.Console.WriteLine("\n===== Opgave 3 : MyStack =====\n");
MyStack <int> stack = new MyStack <int>();
stack.Push(1);
stack.Push(2);
stack.Push(3);
System.Console.WriteLine(stack.Top());
stack.Pop();
stack.Pop();
stack.Pop();
try
{
stack.Pop();
}
catch (MyStackEmptyException e)
{
System.Console.WriteLine(e.Message);
}
}
