嗯
我输出了中间结果，完全不对
by namespace_std @ 2018-02-22 10:40:21
sum+=current一句后我加入了
```cpp
printf("%lf %lf %d\n",current,sum,step);
```
得到中间结果如下：
```
INPUT:
80
------------
OUTPUT:
2.000000 4.000000 2
4.000000 8.000000 3
6.000000 14.000000 4
8.000000 22.000000 5
10.000000 32.000000 6
12.000000 44.000000 7
14.000000 58.000000 8
16.000000 74.000000 9
18.000000 92.000000 10
10
请按任意键继续. . .
```
by namespace_std @ 2018-02-22 10:45:03
@[namespace_std](/space/show?uid=85053) 好的，谢谢！
by Kristella @ 2018-02-23 22:04:31