循环-10. 求序列前N项和*

 /*
  * Main.c
  * C10-循环-10. 求序列前N项和
  *  Created on: 2014年7月30日
  *      Author: Boomkeeper
  *******部分通过*******
  */

 #include <stdio.h>

 int main(void) {

     double sum = 0.0; //记录前N项和
     int numerator = ,denominator = ; //分子分母
     int N; //题目中的N
     int i;//循环使用
     int tem = ;

     scanf("%d", &N);

     if (N == )
         printf("%.2f\n", (double) numerator / denominator);
     else {
         sum = (double) numerator / denominator;
         for (i = N; i > ; i--) {
             tem = denominator;
             denominator = numerator;
             numerator = numerator + tem;
             sum += (double) numerator / denominator;
         }
         printf("%.2f\n", sum);
     }

     return ;
 }

不完美...

题目链接：

http://pat.zju.edu.cn/contests/basic-programming/%E5%BE%AA%E7%8E%AF-10

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