public class Nan {

	static void foo(double x, double y) {
		System.out.printf("%e\n", x/y);
	}
	
	static void bar(double x) {
		System.out.printf("%e\n", Math.sqrt(x));
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		foo(0.0, 0.0);
		bar(-1);
	}

}