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POStack problem java. Postfix Evaluation
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copied!<p>Hey Guys I'm having a problem when I run my program. In the PostfixEvaluate() Method is where it takes in a string and solves the postfix problem and returns it. Well when I go to run it, I'm getting a bunch of random numbers(some repeated), I'm going crazy because I don't know what else to try and I've spent more time on this than it should normally take. </p> <p>Heres the PostfixEvaluate Method:</p> <pre><code> public int PostfixEvaluate(String e){ //String Operator = ""; int number1; int number2; int result=0; char c; //number1 = 0; //number2 = 0; for(int j = 0; j < e.length(); j++){ c = e.charAt(j); if (c != '+'&& c!= '*' && c!= '-' && c!= '/') { //if (c == Integer.parseInt(e)) { s.push(c); } else { number1 = s.pop(); number2 = s.pop(); switch(c) { case '+': result = number1 + number2; break; case '-': result = number1 - number2; break; case '*': result = number1 * number2; break; case '/': result = number1 / number2; break; } s.push(result); } System.out.println(result); } return s.pop(); } public static void main(String[] args) { Stacked st = new Stacked(100); String y = new String("(z * j)/(b * 8) ^2"); String x = new String("2 3 + 9 *"); TestingClass clas = new TestingClass(st); clas.test(y); clas.PostfixEvaluate(x); } } </code></pre> <p>This is the Stack Class: </p> <pre><code> public class Stacked { int top; char stack[]; int maxLen; public Stacked(int max) { top = -1; maxLen = max; stack = new char[maxLen]; } public void push(int result) { top++; stack[top] = (char)result; } public int pop() { int x; x = stack[top]; //top = top - 1; top--; return x; } public boolean isStackEmpty() { if(top == -1) { System.out.println("Stack is empty " + "Equation Good"); return true; } else System.out.println("Equation is No good"); return false; } public void reset() { top = -1; } public void showStack() { System.out.println(" "); System.out.println("Stack Contents..."); for(int j = top; j > -1; j--){ System.out.println(stack[j]); } System.out.println(" "); } public void showStack0toTop() { System.out.println(" "); System.out.println("Stack Contents..."); for(int j=0; j>=top; j++){ System.out.println(stack[j]); } System.out.println(" "); } } </code></pre>

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