2014年5月整理java笔试题及几个小面试题

实现2/1 3/2 5/3 8/5 13/8...前20项的和public class Test {public double sum(){double m = 1; //分母double n = 2;//分子double sum = 0;for (int i = 0; i < 20; i++) {sum = sum+n/m;double temp = m;m = n;n = m + temp;}return sum;}public static void main(String[] args) {Test tt = new Test();System.out.println(tt.sum());}//总和为32.66026079864164}

Javascript实现递归1+2+3+....+100的和

               function digui(n){if(n==1){return 1;}else{return n + digui(n-1);}}var sum = digui(100);alert(sum);