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金浩 #39

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shencang opened this issue Nov 5, 2016 · 0 comments

shencang commented Nov 5, 2016 •

edited

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数列求和

#include<stdio.h>
int main()
{
    int a,b,c,i;
    float s;//循环变量 
    a=1;b=2;
    for(i=1;i<=20;i++)
    {
        s=s+1.0*b/a;//谜之不懂这里加了括号就成保留整数// 
        c=a;
        a=b;
        b=c+b;
    }
    printf("%.16f",s);//计算结果// 
    return 0;
}

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