// f_to_c.java      compile    javac -cp . f_to_c.java
//                  execute    java  -cp . f_to_c fahrenheit returns celsius
// temperature   fahrenheit  celsius   kelvin  degrees
//               -459.67     -273.15     0.0     absolute zero
//                 32           0      273.15    water H2O freeze
//                212         100      373.15    water H2O boils
//               2750        1510     1783.15    some steel melts
// a water molecule having two hydrogen atoms and one oxygen atom
// a copper wire at absolute zero has zero resistance, super conducting

public class f_to_c
{
  public f_to_c(double f)
  {
    double factor = (double)100/(double)(212-32);
    double c;
    System.out.println("f_to_c.java fahrenheit to celsius running");
    c = (f-32.0)*factor;
    System.out.println(f+" degrees fahrenheit = "+c+" degrees celsius");
  }

  public static void main (String[] args)
  {
    new f_to_c(Double.parseDouble(args[0]));
  }
} // end f_to_c