#include <iostream>

using namespace std;

int main() {
     float fahrenheit{0};
     float celsius{0};
     int intCelsius{0};

     cout << "Enter the temperature in fahrenheit => ";
     cin >> fahrenheit;

     //just broken
     //  celsius = 5/9 * (fahrenheit - 32);
    
     // this one is ok
     // celsius = float(5)/float(9) * (fahrenheit - float(32));
   
    
     // probably the one to do
     celsius = static_cast<float>(5)/static_cast<float>(9) 
               * (fahrenheit - static_cast<float>(32));
     

     // all ok
     //celsius = 5.0/9 * (fahrenheit - 32);
     //celsius = 5.0/9.0 * (fahrenheit - 32);
     //celsius = 5/9.0 * (fahrenheit - 32);
     //celsius = static_cast<float>(5)/9 * (fahrenheit - 32);

     // make the output an int.
     intCelsius = static_cast<int> (celsius + 0.5);

     cout << "The temperature in celsius is " << intCelsius << endl;

     return 0;
}