hello,

I have a java project that involves reading postfix equations with decimals and putting them into a stack... the program needs to put numbers in a stack and then once a operator is introduced i.e.( +, -,*,/ ) it needs to pop off the first 2 numbers and do the equation i.e. ( 2 + 2 = 4 ) and put the result on top of the stack... it needs to do this for the link of the equation.

i have this so far but need help finishing it... thanks

import java.util.*;

import java.util.Stack;

public class Postfix {

public static void main(String[] args) {

String string = "2.2 6.14 + 3.5 6.2 * + " ; // an example equation... program needs to pop the first two and do addition then the next 2 and do multiplaction then the addition again

System.out.println(PostFixEval(string));

}

public static double PostFixEval(String postfixExpr) {

Stack stack = new Stack();

String[] items = postfixExpr.split(" ");

Double value1 = stack.pop();

Double value2 = stack.pop();

switch ()) { // I really want to use stack but i cant figure out how the loop to use with it.

case "+":

stack.push(value2 + value1);

break;

case "-":

stack.push(value2 - value1);

break;

case "*":

stack.push(value2 * value1);

break;

case "/":

stack.push(value2 / value1);

break;

}

return stack.pop();

}

}