#include <iostream>
void initialize_screen();
double ca(double fa);
void show_results(double c, double f);
int main()
{
    using namespace std;
    double c1, f1;
    initialize_screen();
    cout << "Please enter f1:" << endl;
    cin >> f1;
    c1 = ca(f1);
    show_results(c1, f1);
    return 0;
}
void initialize()
{
    using namespace std;
    cout << endl;
    return;
}
double ca(double fa)
{
    using namespace std;
    return((5.0/9.0)*(fa - 32));
}
void show_results(double c, double f)
{
    using namespace std;
    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(1);
    cout << "f is :" << f << endl
         << "c is :" << c << endl;
    return;
}