title: Area of Triangle, Java
body: <p>I'm trying to build an app which computes the area of a triangle, as per my homework assignment.  Not quite sure where I'm going wrong, but I input the lengths of the triangle and would like the proper area displayed according to Heron's formula: <code>sqrt (s(s-a) (s-b) (s-c))</code>.  All I'm getting for output is <code>-0.0</code>. Here is the code:</p>
  
  <pre><code>import java.lang.Math;
  public class Formula
  {
      double area; double s;
      public double findArea(double sideA, double sideB, double sideC)
      { 
          s = 1/2 * (sideA + sideB + sideC);
          area = Math.sqrt(s*(s-sideA)*(s-sideB)*(s-sideC));
          System.out.println("The area of the triangle is " + area);
          return area;
      }
  }
  </code></pre>
  
  <p>And then I have another file for the main args</p>
  
  <pre><code>import java.util.Scanner;
  
  public class findTriangleArea {
  
      /**
       * @param args
       */
  
      public static void main(String[] args) {
  
          // TODO Auto-generated method stub
          Formula triangle = new Formula();
          double a,b,c;
  
          // input triangle lengths a, b, c 
          Scanner inputTriangle = new Scanner(System.in);
          System.out.println("Please enter triangle side a");
          a = inputTriangle.nextDouble();
          System.out.println("Please enter triangle side b");
          b = inputTriangle.nextDouble();
          System.out.println("Please enter triangle side c");
          c = inputTriangle.nextDouble();
          triangle.findArea(a, b, c);
      }
  }
  </code></pre>