#include
int main(){
int choice = 0;
double temperature = 0.0;
printf("Select the conversion (1 or 2): ");
scanf("%d", &choice);
printf("Enter a temperature in degrees %s: ",
(choice == 1 ? "Centigrade" : "Fahrenheit"));
scanf("%lf", &temperature);
if(choice == 1)
printf("That is equivalent to %.2lf degrees Fahrenheit\n", temperature*9.0/5.0+32.0);
else
printf("That is equivalent to %.2lf degrees Centigrade\n", (temperature-32.0)*5.0/9.0);
}