How to solve this? I got same answer

#include <iostream>


using namespace std;

int main ()

    int charge, aftercharge, parking_hours;

     cout << "please put your parking hours:    " ;
     cin >> parking_hours;

     if (parking_hours>=1)
     {
        charge = 1 ;
     }
     else if (parking_hours>=11)
    {
        charge = 2.50 ;
    }
     else if (parking_hours>=12)
     {
        charge = 6.00 ;

     }
     aftercharge = parking_hours*charge ;

     cout << "your bills RM" << aftercharge;
     cout << "this is your charge RM: " << parking_hours;

return 0;