看这数列的找规律:2/1,3/2,5/3,8/5,13/8.......
后一项的分母等于前一项的分子,后一项的分子等于前一项的分母+分子
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/5882b2b7d0a20cf4ee8f4dd97a094b36acaf999d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
#include <
stdio.h>
int main()
{
int i,n;
double sum=0,z,m,zSave;//z,m分别保存分子分母
printf("输入数值n:");
scanf("%d",&n);
z=2;m=1;
for(i=0;i<n;i++)
{
sum=sum+z/m;
printf("+%.0lf/%.0lf",z,m);
zSave=z;
z=z+m;
m=zSave;
}
printf("=%.6lf",sum);
return 0;
}
追问谢谢