Java经典练习题22

/*
题目：利用递归方法求5!。
*/
public class Class22 {

public static void main(String[] args) {
int n = 5;
res r = new res();
System.out.println(r.res(n));
}
}
class res{
public int res(int n){
int value = 0;
if(n == 1){
value = 1;
}else{
value = n * res(n-1);
}
return value;
}
}