???
by 3blue1blue @ 2022-07-09 12:18:33
什么勾八标题。
by fjy666 @ 2022-07-09 12:19:25
分段的
by hahazhou @ 2022-07-09 12:19:32
@[dingzijie13776810409](/user/686023) 学过数学的分段计算么
by Super_Supper @ 2022-07-09 12:19:45
jbl
by 3blue1blue @ 2022-07-09 12:20:09
勾八楼主的勾八标题
by ACaCaca_ @ 2022-07-09 12:33:09
@[dingzijie13776810409](/user/686023) 比如说你的费用在2区间里你不仅要交比一区间多出来的还要交一区间的全部电费
by imzzzzzzy @ 2022-07-09 12:45:04
@[dingzijie13776810409](/user/686023)
放上个代码体会体会
```cpp
#include<cstdio>
int main(){
double a;
scanf("%lf",&a);
if(a<=150)printf("%.1lf",a*0.4463);
else if(a<=400)printf("%.1lf",150*0.4463+(a-150)*0.4663);
else printf("%.1lf",150*0.4463+250*0.4663+(a-400)*0.5663);
return 0;
}
```
by imzzzzzzy @ 2022-07-09 12:47:33
@[zhangzhengyan123](/user/541436)
谢谢
by dingzijie13776810409 @ 2022-07-14 14:06:34
《关于为啥setprecision()的值为2的问题》
by harvardideal @ 2022-07-21 20:13:18