COS126

• Download Perimeter.java

/*************************************************************************
 * Name:
 * NetID:
 * Precept:
 *
 * Description: Calculates the perimeter of a triangle whose coordinates
 * are (0, 0), (xA, yA), and (xB, yB), where xA1, yA, xB, and yB
 * are integer commmand-line arguments.
 *
 * Example:
 * % java Perimeter 0 3 4 0
 * 12.0
 * 
 *************************************************************************/

public class Perimeter {
   
    // computes the square function (x^2)
    public static int square(int x) {
        return x * x;
    }
   
    // Euclidean distance between origin and (x, y)
    public static double hypotenuse(int x, int y) {
        double sum = square(x);
        sum += square(y);
        return Math.sqrt(sum);
    }
   
    // first method to execute
    public static void main(String[] args) {
        int xA = Integer.parseInt(args[0]);
        int yA = Integer.parseInt(args[1]);
        int xB = Integer.parseInt(args[2]);
        int yB = Integer.parseInt(args[3]);

        double perimeter = 0;
        perimeter += hypotenuse(xA-xB, yA-yB);  // length of side AB
        perimeter += hypotenuse(xA, yA);        // length of side OA
        perimeter += hypotenuse(xB, yB);        // length of side OB
        StdOut.println(perimeter);
    }
}