caljiechen.java

求阶乘

/*计算阶乘*/
public class CalJieChen{
	public static void main(String args[]){
		int n=5;
		System.out.println("n!="+calN(n));
	}

	public static int calN(int n){
		if((n==1)||(n==0))
			return 1;
		else
			return n*calN(n-1);
	}
}