return of a function

[costantinos]

I have my main and I call another function where I calculate a map<int,
float> and another float number. Is there a way to return both of these
values (the map and the float number) to my main?

Cheers
Costantinos

 

[Alf P. Steinbach]

* (e-mail address removed):

I have my main and I call another function where I calculate a map<int,
float> and another float number. Is there a way to return both of these
values (the map and the float number) to my main?

The ++ in C++ originally denoted classes.

class MapAndFloat ...

MapAndFloat foo() { ... }

or

std::auto_ptr<MapAndFloat> foo() { ... }

if the map is large.

Or you can go for something like

void foo( std::map<int, float>& mOut, double& dOut )
{
std::map<int, float> mResult;
double dResult;

...
mResult.swap( mOut );
dOut = dResult;
}

 

[David Harmon]

On 5 Aug 2006 09:45:39 -0700 in comp.lang.c++, (e-mail address removed)
wrote,

I have my main and I call another function where I calculate a map<int,
float> and another float number. Is there a way to return both of these
values (the map and the float number) to my main?

I would not recommend returning a map<> by value because of the
excessive amount of copying that might result. Instead, declare the
map in main, pass a reference to it to the function and fill it with
values there.

 

[noone]

s there a way to return both of these
values (the map and the float number) to my main?

yes, an object that has both return types as members.