/*uses a conditional expression as well as a conditional statement*/
#include <stdio.h>
#include <ctype.h>
int main(void)
  {
  double fahr, cels;
  int scale;			/*'C' for Celsius input, 'F' for Fahrenheit*/
/*get input type*/
  printf("Type C to convert Celsius to Fahrenheit, or F to go the other way: ");
  scale = toupper(getchar());
/*get input, and do the appropriate calculation*/
  printf("degrees? ");
  scanf("%lf", (scale=='C')? &cels: &fahr);
  if(scale == 'C') {
    fahr = 9.0*cels/5.0+32.0;
  } else {
    cels = 5.0*(fahr-32.0)/9.0;
  }
  printf("%.3f degrees Fahrenheit is %.3f degrees Celsius\n", fahr, cels);
  return 0;
  }