// Code derived from Stroustrup's PPP2 book
// § 4.3.3 Conversions
// -beginning on p 100

#include <iostream>

using std::cin;
using std::cout;

int main()
{
  cout << "Please enter a temperature centigrade: ";
  double dc;
  cin >> dc;

  // 9.0 / 5 * dc + 32 means ((9.0 / double(5)) * dc) + 32
  double df = 9.0 / 5 * dc + 32;  // better

  cout << df << '\n';
}