#include<stdio.h>
double Fibonacci(int n)
{
if(n == 1)
return 1;
else if(n == 2)
return 2;
else
return Fibonacci(n-1)+Fibonacci(n-2);
}
int main()
{
double sum=0;
for(int i = 1;i <= 20;i ++)
sum += Fibonacci(i+1)/Fibonacci(i);
printf("sum=%lf",sum);
return 0;
}运行截图：
注：侵权可删
