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/*************************************************************************

* Compilation: javac Rose.java

* Execution: java Rose N

* Dependencies: StdDraw.java

* Plots an N petal rose (if N is odd) and a 2N-petal rose if N is

* even, using standard graphics.

*************************************************************************/

public class Rose {

public static void main(String[] args) {

int N = Integer.parseInt(args[0]);

StdDraw.setXscale(-1, +1);

StdDraw.setYscale(-1, +1);

StdDraw.setPenColor(StdDraw.PINK);

double x0 = 0, y0 = 0;

for (double t = 0.0; t <= 360.0; t += 0.1) {

double theta = Math.toRadians(t);

double r = Math.sin(N * theta);

double x1 = r * Math.cos(theta);

double y1 = r * Math.sin(theta);

StdDraw.line(x0, y0, x1, y1);

x0 = x1;

y0 = y1;

}

Sunbelt Computer Software