C Exercise Example 24
100 cases of classic C language
Title: There is a sequence of scores: 2 / 1,3 / 2,5 / 3,8 / 5,13 / 8,21 / 13 and the front ... calculated the number of columns 20.
Program analysis: Hold the variation of the numerator and denominator.
Source Code:
// Created by www.w3big.com on 15/11/9.
// Copyright © 2015年 本教程. All rights reserved.
//
#include <stdio.h>
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 above example output is:
32.660263