Java hello hw21function 陳英一 教授

package hello;




public class HelloJava {



/**

* @param args

*/

public static void main(String[] args) {

System.out.println("Hello Java!");



}



}

package funtion;




public class FunctionJava {



/**

* @param args

*/

public static void main(String[] args) {

System.out.println(" <>");

A a = new A();

System.out.println("faci(5) = " + a.faci(5));

System.out.println("facr(5) = " + a.facr(5));

//System.out.println("faci(50) = " + a.faci(50));





}



}



class A{

long faci(int n){

long result=1;

for(int i=2;i<=n;i++){

result*=i;

}

return result;

}

long facr(int n){

if(n<1){

return 1;

}

return facr(n-1)*n;

}

}