/* Demonstrate assertions in Java
 * For the assertion to work, you must run with them enabled:
 * java -ea GPACalc
 * If the expression is False, then an AssertionError is thrown, with the error message (which is after the colon)
 */
public class GPACalc {
	public static double calc (double ary[]) {
		double sum = 0;
		for (double f : ary) {
			assert f >= 0.0 && f <= 4.3 : "Invalid value " + f;
			sum += f;
		}
		return sum/ary.length;
	}
	
	public static void main (String args[]) {
		double a[] = {3.5, 3.8, 4.0, 4.1, 4.5};
// 		try {
		    System.out.println(calc(a));
// 		} catch (AssertionError e ) {
// 		    System.out.println( "Caught the assertion error. No crashing for you!" );
// 		}
	}
}