Triangle

/*Therron Telford
AP CS A
October 24, 2017
*/

import java.util.Scanner;
import java.lang.Math.*;

public class Triangle
{
    private int sideA, sideB, sideC;
    private double perimeter;
    private double theArea;

    public Triangle()
    {
       setSides(0,0,0);
       perimeter=0;  // not really needed
       theArea=0;  // not really needed
    }

    public Triangle(int a, int b, int c)
    {
        setSides(a,b,c);
    }


    public void setSides(int a, int b, int c)
    {
        // initialize the sides
        sideA = a;
        sideB = b;
        sideC = c;
    }

    public void calcPerimeter( )
    {
        perimeter = sideA + sideB + sideC;
    }

    public void calcArea( )
    {
        double s= perimeter / 2.0;  // s is a LOCAL VARIABLE.  We generally do not include a local variable
               // as one of the INSTANCE VARIABLES when it will only be used once.
               // In these cases it is declared and initialized in the method where it will be used.
        theArea = Math.sqrt(s* (s-sideA) * (s-sideB) * (s-sideC));

    }

    public void print( )
    {
        System.out.println("\n" +sideA + " "+ sideB + " "+ sideC);

        System.out.printf("Area ==  %.3f  \n\n" ,theArea );
    }

    //create a print method or toString or both

    public String toString()
    {
        return "\n" +sideA + " "+ sideB + " "+ sideC+ "\n"+
                "Area ==  " + String.format("%.3f", theArea);
    }
}