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陈茹 #21

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king-ru opened this issue Oct 28, 2016 · 0 comments

king-ru commented Oct 28, 2016

数列前二十项求和（2/1,3/2,5/3,8/5,13/8..........）

#include"stdio.h"
int main()
{
 int i=1;
 float f1=2.0,f2=1.0,sum=0.0,f,a;
 while(i<21)
 {
     f=f1/f2;
     a=f1+f2;
     sum+=f;
     f2=f1;
     f1=a;
     i++;
 }

printf("%f\n",sum);

}

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