interface FunctionF {
	public double f(double input);
}
/* 
class applySin implements FunctionF {
	public double f(double in) {
		return Math.sin(in);
	}
}
 
class applyCos implements FunctionF {
	public double f(double in) {
		return Math.cos(in);
	}
}
 
class applySqrt implements FunctionF {
	public double f(double in) {
		return Math.sin(in);
	}
}
 
 */
 
 
 
class MathArray {
 
	public static FunctionF SQRT = new FunctionF() {
		public double f(double in) {
			return Math.sqrt(in);
		}};
 
 
		public static FunctionF SIN = new FunctionF() {
			public double f(double in) {
				return Math.sin(in);
			}};
 
			public static FunctionF COS = new FunctionF() {
				public double f(double in) {
					return Math.cos(in);
				}};
 
				double[] array;
 
				MathArray(double[] array) {
 
					this.array = array;
 
				}
 
 
				void applyFunction(FunctionF uf) {
					int i;
					for(i = 0; i < array.length; i++) {
						array[i] = uf.f(array[i]);
					}
				}
 
				void warnNaN(double d) {
 
					if(((Double)d).isNaN())
						System.err.println("Warning: result is undefined");
 
				}
 
 
				void print() {
 
					for(int i = 0; i < array.length; i++)
						System.out.print(array[i] + (i < array.length-1?", ":"\n"));
 
				}
 
}
 
 
public class Test {
 
	public static void main(String[] args) {
 
		MathArray te = new MathArray(new double[] { 0.1, 2.23, 3.08 });
 
		te.applyFunction(MathArray.SQRT);
		te.applyFunction(MathArray.SIN);
		te.applyFunction(MathArray.COS);
 
		te.print();
	}
 
}