proper function call syntax

**jerrykelleyjr** · 12-27-2004

What is the proper syntax for calling this function?

Code:

void BA747_RADIO::StoreThisMessage(B747_Flight::Flight_t flight, unsigned index)
{
    int temp;
    Flight_Object flightObj;

       temp = (int)_data.msgsReceived[index].type;
        switch (temp) {
           case BA747_RADIO::VORTACS:
                // vor/tacan
                flightObj.Add_Radio_aid(radiodata.Rec[index].VORTAC_Data, flight);
                break;
           case BA747_RADIO::ADFS:
                // adf
                flightObj.Add_Radio_aid(radiodata.Rec[index].ADF_Data, flight);
                break;
        };              
} // end BA747_RADIO::StoreThisMessage

**sean** · 12-27-2004

It depends on the scope. If you're outside of the class you need to include the class name, and depending on how that object is reference, add the appropriate operator (-> for point, . for otherwise). You then have the function name, and include the parameters. To give you more detail on the parameters, you probably want to use a simpler example. I have no idea what this function does, and it's quite hard to tell. But if that's enough detail, then... [random smiley]

[/random smiler]

**The Brain** · 12-27-2004

Here is one way:

Code:

class_object.StoreThisMessage(B747_Flight_t_object , number);

**jerrykelleyjr** · 12-27-2004

OK...calling it from outside the class...what would the call look like? Also note that in my code example the "Flight_ t" should be "Flight_t"...probably obvious to most.

**sean** · 12-27-2004

Code:

// Declare an instance of DA747_RADIO called Instance, a pointer to it called IPointer, and the data for the necessary parameters
 
Instance.StoreThisMessage(my_flight, an_index);
IPointer->StoreThisMessage(another_flight, one_index);

**jerrykelleyjr** · 12-27-2004

Could I simply make the call like this?

BA747_RADIO::StoreThisMessage(my_flight, an_index);

**The Brain** · 12-27-2004

nope. you have to:

1) declare an instance of the BA747_RADIO class:

Code:

BA747_RADIO *Boeing_Avionics;

or

Code:

BA747_RADI Boeing_Avionics;

2) dereference StoreThisMessage( ) from the newly created class object:

Code:

Boeing_Avionics->StoreThisMessage(argument1, argument2);

or

Code:

Boeing_Avionics.StoreThisMessage(argument1, argument2);

You get extra bonus points for asking a pilot

**sean** · 12-27-2004

Could I simply make the call like this?

In some languages you can do that by making the class "static", but since I imagine that you want to "Store This Message" in a particular 747 Radio object, that would defeat the purpose.

**jerrykelleyjr** · 12-27-2004

declaring an instance? hmmmm..What exactly does that do?

**andyhunter** · 12-27-2004

Ok, do me a favor and read this .

After that why don't you tell us exactly what you are trying to do, maybe with some code/psuedocode.

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