Talk is cheap,show me your code.
by qifan_maker @ 2024-03-12 20:13:23
@[q789456](/user/1304144) 看清楚再说。
> 总成绩是 $60\times20\%+\color{red}90\times30\%\color{black}+80\times50\%=12+\color{red}27\color{black}+40=79$
by wzj0829 @ 2024-03-12 20:16:19
@[q789456](/user/1304144) 应为你要用高精，而不是 `double`。（逃）
by XuYueming @ 2024-03-12 20:18:40
AC Code:
```cpp
#include <iostream>
#include <cmath>
using namespace std;
int a, b, c;
int main() {
cin >> a >> b >> c;
cout << a * 0.2 + b * 0.3 + c * 0.5;
}
```
by lovely_codingcow @ 2024-03-12 20:20:11
@[qifan_maker](/user/706607) 代码发不出去
一发就显示错误
by q789456 @ 2024-03-12 20:27:21
@[q789456](/user/1304144)
```cpp
#include <bits/stdc++.h>
using namespace std;
int main(){
int a,b,c;
cin>>a>>b>>c;
int cj;
cj=a*0.2+b*0.3+c*0.5;
cout<<cj;
return 0;
}
``````
by q789456 @ 2024-03-12 20:30:08
@[q789456](/user/1304144) 小数记得用 `double`。
```cpp
#include <bits/stdc++.h>
using namespace std;
int main(){
int a,b,c;
cin>>a>>b>>c;
double cj;
cj=a*0.2+b*0.3+c*0.5;
cout<<cj;
return 0;
}
```
by qifan_maker @ 2024-03-12 20:32:15
@[qifan_maker](/user/706607) 谢谢
by q789456 @ 2024-03-12 20:33:42