Homework SourseIm try to create a java program that checks to see if a give
Im try to create a java program that checks to see if a given boolean expression is a tautology or not
my code so far is as follows:
public static class TreeNode
{
char data;
TreeNode left;
TreeNode right;
TreeNode(char item)
{
data = item;
left = null;
right = null;
}
}
public static class Tree
{
boolean operator(char x) // if isUpperCase
{
if(Character.isUpperCase(x))
{
return true;
}
return false;
}
TreeNode buildTree(char s[])
{
Stack<TreeNode> stack = new Stack();
TreeNode tN;
TreeNode tN1;
TreeNode tN2;
for(int i = 0; i < s.length; i++)
{
if(!operator(s[i]))
{
tN = new TreeNode(s[i]);
stack.push(tN);
}
else
{
tN = new TreeNode(s[i]);
tN1 = stack.pop();
tN2 = stack.pop();
tN.right = tN1;
tN.left = tN2;
stack.push(tN);
}
}
tN = stack.peek();
return tN;
}
public void printTree(TreeNode tN)
{
if(tN != null)
{
printTree(tN.left);
System.out.print(tN.data);
printTree(tN.right);
}
}
//Evaluate/Solve
//To do....
} //End of Tree Class
public static void main(String[] args)
{
Tree newTree = new Tree();
Scanner keyboard = new Scanner(System.in);
System.out.println(\"Please enter a postfix expression:\"); //Example: ppO
String s = keyboard.nextLine();
char[] array = s.toCharArray();
TreeNode trNode = newTree.buildTree(array);
newTree.printTree(trNode);
}
}
Solution
static void Main() { Console.Write(\"Enter a character: \"); char c = (char)Console.Read(); if (Char.IsLetter(c)) { if (Char.IsLower(c)) { Console.WriteLine(\"The character is lowercase.\"); } else { Console.WriteLine(\"The character is uppercase.\"); } } else { Console.WriteLine(\"Not an alphabetic character.\"); } } }
