Temperature converter in C

temp_convert.c

#import<stdio.h>

double convert_temp(double temp_f){
  double temp_c;
  temp_c = (temp_f - 32) * 5/9;
  return(temp_c);
}

int main(){
  
  double temp_f;
  double temp_c;
  printf("Enter the temperature in degrees farenheit:");
  scanf("%lf", &temp_f);
  temp_c = convert_temp(temp_f);
  printf("The temperature in celsius is %f degrees.\n", temp_c);
  if(temp_f > 80){
    printf("It's pretty hot, you should bring water.\n");
  }
  return(0);
}