PP2_10

import java.text.DecimalFormat;
import java.lang.Math;
import java.util.Scanner;
public class Triangle
{
    public static void main (String[] args)
    {
        int a, b, c, discriminant;
        double area, s;
        
        //scanner
        Scanner keyboard = new Scanner(System.in);
        System.out.print("What is side a of the triangle? ");
        a = keyboard.nextInt();
        
        System.out.print("What is side b of the triangle? ");
        b = keyboard.nextInt();
        
        System.out.print("What is side c of the triangle? ");
        c = keyboard.nextInt();
        
        //three decimal places
        DecimalFormat decimal = new DecimalFormat ("0.###");
        
        //math
        s = (double)(a + c + b)/2.0;
        area = (double)(Math.sqrt(s* (s-a) * (s-b) * (s-c)));
        
        System.out.println("The area of the triangle is " + decimal.format(area));
        
    } //end main
} //end class triangle