2. #include <iostream> 
  3. using namespace std; 
  4. void convertTemp(double, double); 
  5. int main() 
  6. { 
  7. double f_temp = 40; 
  8. double c_temp; 
  9. convertTemp(c_temp, f_temp); 
  10. cout << "화씨온도" << f_temp << "도는 섭씨온도 " << c_temp << "입니다" << endl; 
  11. return 0; 
  12. } 
  13. void convertTemp(double c_temp, double f_temp) 
  14. { 
  15. c_temp = (5.0 / 9.0) * (f_temp - 32); 
  16. }