Python

a=float(input())
if a<=1000:
    w=a*0.95
else:
    w=950+(a-1000)*0.9
print("%.2f"%w)

Python的哦~

x=float(input())
if x<1000:
    print(x*0.95)
else:
    print(round(950+(x-1000)*0.9,2))

#include <iostream>

using namespace std;

int main()
{
    double a,b;
    cin>>a;
    if(a<=1000){
        b=0.95*a;
        printf("%.2f",b);
    }else{
        b=950+0.9*(a-1000);
        printf("%.2f",b);
        }
    return 0;
}

#include <iostream>

using namespace std;

int main() { float a,w; cin>>a; if(a<=1000){ w=0.95*a; printf("%.2f",w); } else{ w=950 + (a-1000.00)*0.90; cout<<w; };

return 0;

}