how to add sub classes together

[sesslit805]

Idk how to add the calculateCost from the other sub classes and base class together. Help.

 void PackageInventory::CalculateTotalCost()
{
  cout << "\n____________________________________________\n";

  cout << "\nCalculating Total Cost\n";

  for(int i=0; i < packages.size(); i++)
    {
      cout << packages[i].calculateCost();
      cout <<endl;
    }
  for(int i=0; i < expressPackages.size(); i++)
    {
      cout << expressPackages[i].calculateCost();
      cout <<endl;
    }
  for (int i=0; i<priorityPackages.size(); i++)
    {
      cout << priorityPackages[i].calculateCost();
      cout <<endl;
    }
  for (int i=0; i<internationalPackages.size(); i++)
    {
      cout << internationalPackages[i].calculateCost();
      cout <<endl;
    }


}

This is the output:
Calculating Total Cost
4.25
12.00
40.90
33.08
196.78
79.40
74.62
12.00
18.00
30.00
0.00
65.00
0.00
11.97
165.00
154.00
335.00


I want these numbers to add together giving me one number for the sum of all of them

[gunnerfunner]

change the CalculateTotalCost() method to return double (or int) and have a variable sum running through the various loops:

double PackageInventory::CalculateTotalCost()
{
  double sum{};
  cout << "\n____________________________________________\n";

  cout << "\nCalculating Total Cost\n";

  for(int i=0; i < packages.size(); i++)
    {
      cout << packages[i].calculateCost();
      sum += packages[i].calculateCost();
      cout <<endl;
    }
  for(int i=0; i < expressPackages.size(); i++)
    {
      cout << expressPackages[i].calculateCost();
      sum += expressPackages[i].calculateCost();
      cout <<endl;
    }
  for (int i=0; i<priorityPackages.size(); i++)
    {
      cout << priorityPackages[i].calculateCost();
      sum += priorityPackages[i].calculateCost();
      cout <<endl;
    }
  for (int i=0; i<internationalPackages.size(); i++)
    {
      cout << internationalPackages[i].calculateCost();
      sum += internationalPackages[i].calculateCost();
      cout <<endl;
    }
    return sum;

}

[sesslit805]

I did it that way but it did not work it still printed the same thing

[gunnerfunner]

show your full program

[sesslit805]

it says my program is too long :,,(

[sesslit805]

double PackageInventory::CalculateTotalCost()
{
  double sum=0;

  cout << "\n____________________________________________\n";

  cout << "\nCalculating Total Cost\n";

  for(int i=0; i < packages.size(); i++)
    {
      cout << packages[i].calculateCost();
      sum+= packages[i].calculateCost();
      cout <<endl;
    }
  for(int i=0; i < expressPackages.size(); i++)
    {
      cout << expressPackages[i].calculateCost();
      sum+=expressPackages[i].calculateCost();
      cout <<endl;
    }
  for (int i=0; i<priorityPackages.size(); i++)
    {
      cout << priorityPackages[i].calculateCost();
      sum+=priorityPackages[i].calculateCost();
      cout <<endl;
    }
  for (int i=0; i<internationalPackages.size(); i++)
    {
      cout << internationalPackages[i].calculateCost();
      sum+=internationalPackages[i].calculateCost();
      cout<<endl;
    }
  return sum;

[gunnerfunner]

this function by itself seems OK, the problem is elsewhere in the program.