recursionexample.java

JAVA编程思想源代码 值得一下 很难找的

package chapter6;

public class RecursionExample {

	int fact(int n) {
		if (n<=0)
			return -1;
		int result;
		if(n==1) return 1;
		result = fact(n-1) * n;
		return result;
		}

	
public static void main(String[] args) {
		RecursionExample rex = new RecursionExample();
		System.out.println("-3! ="+rex.fact(-3));
		System.out.println("3! = "+rex.fact(3));
		System.out.println("6! =  " + rex.fact(6));
		System.out.println("7! =  " + rex.fact(7));
		System.out.println("8! =  " + rex.fact(8));

	}
}