这为什么错了！新人求指点。

gsc15759915601 @ 2023-07-09 12:14:01

#include<bits/stdc++.h>
using namespace std;
long long n,x,y,z;
long double m;
int main(){
    cin>>n;
    if(n>150){
        m = 150*0.4463*0.0001;
        if(n>400){
            m = 250*0.4663*0.0001+m;
            cout<<fixed<<setprecision(1)<<m+(n-400)*0.4663;
        }else{
            cout<<fixed<<setprecision(1)<<m+(n-150)*0.5663;
        }
    }else{
        cout<<fixed<<setprecision(1)<<n*0.4463;
    }
    return 0;
}

by ToastBread @ 2023-07-09 13:05:25

#include<bits/stdc++.h>
using namespace std;
long long n,x,y,z;
long double m;
int main(){
    cin>>n;
    if(n>150){
        m = 150*0.4463;
        if(n>400){
            m = 250*0.4663+m;
            cout<<fixed<<setprecision(1)<<m+(n-400)*0.5663;
        }else{
            cout<<fixed<<setprecision(1)<<m+(n-150)*0.4663;
        }
    }else{
        cout<<fixed<<setprecision(1)<<n*0.4463;
    }
    return 0;
}

改了的

修了你m*0.0001(why?)

by I_like_LCH @ 2023-07-09 13:07:08

@gsc15759915601

#include<bits/stdc++.h>
using namespace std;
long long x,y,z;
double m=0,n;
int main(){
    cin>>n;
    if(n>150)
    {
        m = 150*0.4463;
        if(n>400)
        {
            m = 250*0.4663+m;
            cout<<fixed<<setprecision(1)<<m+(n-400)*0.5663;
        }
        else
        {
            cout<<fixed<<setprecision(1)<<m+(n-150)*0.4663;
        }
    }
    else
    {
        cout<<fixed<<setprecision(1)<<n*0.4463;
    }
    return 0;
}

你的4663和5663反了

by ToastBread @ 2023-07-09 13:07:56

#include<bits/stdc++.h>
using namespace std;
long long n,x,y,z;
long double m;
int main(){
    cin>>n;
    if(n>150){
        m = 150*0.4463*0.0001;//为什么*0.0001？
        if(n>400){
            m = 250*0.4663*0.0001+m;//同上
            cout<<fixed<<setprecision(1)<<m+(n-400)*0.4663;
        }else{
            cout<<fixed<<setprecision(1)<<m+(n-150)*0.5663;
        }
    }else{
        cout<<fixed<<setprecision(1)<<n*0.4463;
    }
    return 0;
}

你的M是底价，应该不（了会让结果小很多）

by gsc15759915601 @ 2023-07-09 13:08:44

*0.0001是为了提升精度，不过谢谢二位。

by ToastBread @ 2023-07-09 13:09:04

@I_like_LCH 谢谢改正 但不调也能过（

by ToastBread @ 2023-07-09 13:10:50

@gsc15759915601 你最后要*回来，注意下

by I_like_LCH @ 2023-07-09 13:11:22

@ToastBread 这数据……

by ToastBread @ 2023-07-09 13:12:18

@I_like_LCH 数据太水了

by I_like_LCH @ 2023-07-09 13:13:38

@ToastBread 雀食