jtulach@321: package org.apidesign.math.test;
jtulach@321: 
jtulach@321: import org.apidesign.math.Arithmetica;
jtulach@321: 
jtulach@321: /** Class showing inventive, non-expected use of 
jtulach@321:  * Arithmetica methods to do multiplication instead of
jtulach@321:  * addition.
jtulach@321:  */
jtulach@321: // BEGIN: design.composition.arith.factorial
jtulach@321: public final class Factorial extends Arithmetica {
jtulach@321:     public static int factorial(int n) {
jtulach@321:         return new Factorial().sumRange(1, n);
jtulach@321:     }
jtulach@321:     @Override
jtulach@321:     public int sumTwo(int one, int second) {
jtulach@321:         return one * second;
jtulach@321:     }
jtulach@321: }
jtulach@321: // END: design.composition.arith.factorial
jtulach@321: