个回答

• 啦啦啦诺克萨斯

  2017-04-11 20:00:14

  已采纳

  double sum = 0.0;
  		double fz = 2.0;
  		double fm = 1.0;
  		double t = 0.0;
  		for(int i = 0; i <= 4; i ++){
  		sum += (fz / fm);
  		t=fm;
  		fm = fz;
  		fz += t;
  		
  		
  		}
  		System.out.println("sum:"+sum);

  
  

  1

• qq_随心_57

  2017-04-11 20:31:35

  public class HelloWorld {

  两个值交换，需要用一个中间值进行转化一下。

  public static void main(String[] args) {

  double sum = 0.0;

  double fz = 2.0;

  double fm = 1.0;

  double t=0.0;

  for (int i = 0; i <5; i++) {

  sum += (fz / fm);

  t=fz;

  fz += fm;

  fm = t;

  }

  System.out.println("sum:" + sum);

  }

  
  

  1

• 啦啦啦诺克萨斯

  2017-04-11 19:55:29

  i=0时 fz = 2.0 fm = 1.0  sum = 2.0   当i = 1时, fm = fz = 2  fz+=fm(fz = fz+ fm = 2+2=4)  此时sum = 2.0 按你代码以此类推 当然不一样 

  1