60分，求助

yzh1111330212 @ 2023-08-06 13:46:49

#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,s1,s2=0;
    double sum;
    cin>>a;
    if(a<=150){
        sum=a*0.4463;
    }else{
        s1=a-150;
        if(s1>400-151){
            s1=400-151;
            s2=a-s1;
        }
        sum=150*0.4463+s1*0.4663+s2*0.5663;
    }
    printf("%.1lf",sum);
    return 0;
}

by 123456789dd @ 2023-08-06 14:02:08

直接三个判断不容易错

#include<bits/stdc++.h>
using namespace std;
int main()
{
    double a,b=0;
    cin>>a;
    if(a<=150) b=a*0.4463;
    else if(a<=400&&a>150) b+=150*0.4463+(a-150)*0.4663;
    else b+=150*0.4463+250*0.4663+(a-400)*0.5663;
    b=(int(b*10+0.5))/10.0;
    cout<<b;
    return 0;
}

by zixuan_xu @ 2023-08-06 16:31:34

#include<iostream>
#include<algorithm>
using namespace std;
double a=0.4463,b=0.4663,c=0.5663;
int n;
double sum;
int main(){
    cin>>n;
    if(n>150){
        sum+=150*a;
        n-=150;
        if(n>400-150){
            sum+=(400-150)*b;
            n-=(400-150);
            sum+=n*c;
        }else{
            sum+=n*b;
        }
    }else{
        sum+=n*a;
    }
    printf("%.1lf",sum);
    return 0;
} 

by yzh1111330212 @ 2024-07-11 10:27:51

@yzh1111330212 这很简单