C practical exercise topic 24 – sum of series

Time:2020-9-29

Title:There’s a sequence of fractions: 2 / 1, 3 / 2, 5 / 3, 8 / 5, 13 / 8, 21 / 13… Find the sum of the first 20 items in this sequence.

Program analysis:Please grasp the changing law of numerator and denominator.

example:

#include 
  
 int main()
 {
     int i,t;
     float sum=0;
     float a=2,b=1;
     for(i=1;i<=20;i++)
     {
         sum=sum+a/b;
         t=a;
         a=a+b;
         b=t;
     }
     printf("%9.6f\n",sum);  
 }

The output results of the above examples are as follows:

32.660263

Thank you for your reading, please feel with your heart! Hope to help you who love learning!! Sharing is also a kind of happiness!!! Please relay…

Click to view the original text, thank you!

Recommended Today

How to realize incremental update function in uni app

As we all know, many apps have the function of incremental update. At the beginning of this year, uni app launched the function of incremental update. Today we will learn a wave. Of course, in order to prevent developers from providing illegal content to users without market approval, many application markets, especially apple, are averse […]