题解 - 苏州市吴江区中学生信息编程竞赛域

2
12104陈皆乐 (12104陈皆乐) LV 10 @ 2021-12-17 20:11:35

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{
int n;
cin>>n;
if(n<0)
cout<<"error";
else
if(n<=2)
cout<<fixed<<setprecision(1)<<n*10.5;
else
cout<<fixed<<setprecision(1)<<21+(n-2)*4*1.0;
return 0;
}

12209水宇辰 (12209水宇辰) LV 9 @ 2021-12-20 09:37:46

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
    int a;
    cin>>a;
    if(a<0)
    cout<<"error";
    else if(a<=2&&a>=0)
    cout<<fixed<<setprecision(1)<<a*10.5;
    else if(a>2)
    cout<<fixed<<setprecision(1)<<21+(a-2)*4*1.0;

}

0
12203沈宇阳 (12203沈宇阳) LV 8 @ 2021-12-27 09:35:55

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int a;
cin>>a;
if(a<0)cout<<"error";
else if(a<=2&&a>=0)cout<<fixed<<setprecision(1)<<a*10.5;
else if(a>2)cout<<fixed<<setprecision(1)<<21+(a-2)*4*1.0;
return 0;
}
-2
12234洪子昊 (12234洪子昊) LV 8 @ 2021-12-13 11:15:35

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int a;
cin>>a;
if(a<0)
cout<<"error";
else if(a<=2&&a>=0)
cout<<fixed<<setprecision(1)<<a*10.5;
else if(a>2)
cout<<fixed<<setprecision(1)<<21+(a-2)*4*1.0;

}