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我觉得是精度问题吧，最后的结果连int64也放不下的In Reply To:2084 请教一个简单题：关于母函数的，为什么会出错，觉得没错呀？ Posted by:bjtu01281229 at 2005-05-20 03:25:48 > #include <iostream>
> #include <math.h>
> using namespace std;
>
> int main()
> {
> double p,y;
> double c1=(5-sqrt(double(5)))/10,c2=(5+sqrt(double(5)))/10,d1=(3+sqrt(double(5)))/2,d2=(3-sqrt(double(5)))/2;
> cin>>y;
> while(y!=-1)
> { p=c1*pow(d1,y)+c2*pow(d2,y);
> cout<<p<<endl;
> cin>>y;
> }
> return 0;
> }
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