Säähavainnot

input/code.cpp: In function 'int main()':
input/code.cpp:31:103: error: unable to find numeric literal operator 'operator""f'
   31 |                 cout << ((int) (0.75 * (lampotilat[j] + ero) + 0.25 * (lampotilat[23] + ero2) * 10) / 10f) << " ";
      |                                                                                                       ^~~
input/code.cpp:31:103: note: use '-fext-numeric-literals' to enable more built-in suffixes

#include <bits/stdc++.h>
using namespace std;
 
// 0 p.
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int n;
    cin >> n;
 
    float korjaus = -0.14452499494142831;
    int raja = 5;
 
    double lampotilat[24];
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < 24; j++)
        {
            cin >> lampotilat[j];
        }
 
        float ero = (lampotilat[23] - lampotilat[0] - korjaus);
        float ero2 = lampotilat[23] - (lampotilat[22] + lampotilat[21] + lampotilat[20]) / 3.0f;
 
        for (int j = 0; j < 12; j++)
        {
            if (j < raja)
            {
                cout << ((int) (0.75 * (lampotilat[j] + ero) + 0.25 * (lampotilat[23] + ero2) * 10) / 10f) << " ";
            }
            else
            {
                cout << "? ";
            }
        }
    }
}