求出如下分数列的前n项之和 2/1+3/2+5/3+8/5+13/8+21/13.....

Posted 2022-05-20 -slz-2

#include<stdio.h>
double fun(int n)

int i=2,j=1,count=0,t;
double sum=0.0;
while(count<n)

sum=sum+(double)i/j;
t=i;
i=i+j;
j=t;
count++;

return sum;

void main()

int n;
printf("please input a number:");
scanf("%d",&n);
printf("前n项之和为%f\n",fun(n));