求和 2/1,3/2,5/3,8/5,13/8,21/13,34/21,55/34,89/55,144/89..求出这个数列的前20项之和 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 public class Sum { public double sum(int n) { double sum = 0; double num1 = 2; double num2 = 1; double s = num1 / num2; for (int i = 0; i < n; i++) { sum = sum + s; double temp = num1; num1 = num1 + num2; num2 = temp; s = num1 / num2; System.out.println(num1 + "/" + num2 + ","); } return sum; } public static void main(String[] args) { // TODO Auto-generated method stub double sum = new Sum().sum(20) + 1 / 2; System.out.print("sum=" + sum); }} 目前有比较靠谱的Java飞信API用来发信息么,09年以前的好像都不能用了。 正则匹配Html标签 Java.Util.Date!!! 求解java压和解压缩文件的方法! 改FileChooser急求 500分!求一练习题源程序。 \u0027代表的是什么? 小问题!!帮助!! 请问各位大虾,在Applet中如何缩放图片? Jbuilder5中为什么不能import com.borland.*这样的包? 根据猫扑同名漫画写的《自助投胎机》,欢迎下载自助投胎 点击imageview关闭dialog就报错?
double sum = 0;
double num1 = 2;
double num2 = 1;
double s = num1 / num2;
for (int i = 0; i < n; i++) {
sum = sum + s;
double temp = num1;
num1 = num1 + num2;
num2 = temp;
s = num1 / num2;
System.out.println(num1 + "/" + num2 + ",");
} return sum;
} public static void main(String[] args) {
// TODO Auto-generated method stub
double sum = new Sum().sum(20) + 1 / 2;
System.out.print("sum=" + sum);
}}