% cat  tempconv.C

/* tempconv - Converts temperature from Farenheight to Centigrade */
/* and Kelvin */

/*  Written by: C. Severance  - Tue Dec  7 23:01:34 EST 1993 */

#include  <iostream.h>

main() {

  float cent,faren,kelvin;

/* Prompt the user for the Farenheight temperature */

  cout << "enter the farenheight temperature -";
  cin >> faren;

/* Calculate the centigrade temperature  */

  cent = ( faren - 32.0 ) * ( 5.0 / 9.0 ) ;
  cout << "centigrade temperature is - " << cent << "\n";

/* Calculate the kelvin temperature */

  kelvin = cent + 273.0;
  cout << "kelvin temperature is - " << kelvin << "\n";
}
% g++  tempconv.C
% a.out 
enter the farenheight temperature -72
centigrade temperature is - 22.2222
kelvin temperature is - 295.222
%