Question

Possible Duplicate:
Returning multiple values from a C++ function

/************************************************/
/* Name: premserv                               */
/* Description: Calculations for premium serv   */
/* Parameters: N/A                              */
/* Return Value: premserv                       */
/************************************************/

float premserv ()
{
  int daymin = 0;         //Var for day minutes
  int nightmin = 0;       //Var for night minutes
  float daytotal = 0;     //Var for day total
  float nighttotal = 0;   //Var for night total
  float premserv = 0;     //Var for premium service cost

  cout << "\n" << "Please enter the number of minutes used durring the day (6AM - 6PM): " << "\n";
  cin >> daymin;
  cout << "\n" << "Please enter the number of minutes used durring the night (6PM - 6AM): " << "\n";
  cin >> nightmin;

  daytotal = (daymin - 75) * 0.1;
  nighttotal = (nightmin - 100) * 0.05;
  premserv = 25 + daytotal + nighttotal;

  return premserv;

}

I need to get the values from daymin, nightmin, and premserv out of the function. I only know how to get 1 value out of a function.

Answer 1

You could use references.

float premserv (int& daymin, int& nightmin)
{
     float daytotal = 0;     //Var for day total
     float nighttotal = 0;   //Var for night total
     float premserv = 0;     //Var for premium service cost

     cout << "\n" << "Please enter the number of minutes used durring the day (6AM - 6PM): " << "\n";
     cin >> daymin;
     cout << "\n" << "Please enter the number of minutes used durring the night (6PM - 6AM): " << "\n";
     cin >> nightmin;

     daytotal = (daymin - 75) * 0.1;
     nighttotal = (nightmin - 100) * 0.05;
     premserv = 25 + daytotal + nighttotal;

     return premserv;
}

This will directly modify the values of daymin and nightmin and you could still keep premserv as a returned value (since it fits with the function name, I guess).

You’d use it like so:

int daymin = 0;
int nightmin = 0;
float premiumservice = premserv(daymin, nightmin);