osteam question

[crichmon]

Hi,

In a program I am working on I have messages sent to the screen for various
reasons. Rather then using cout directly, I'd like to send an ostream as a
parameter to a method of an object created to centralize messages. For
instance (I'm not saying this code works):

instead of

cout << "some helpful text " << x << " " << y << endl;

I write something to the effect of

MessageCenter.message( "some helpful text " << x << " " << y << endl );


Any insight on how to implement this properly?


thanks,
crichmon

 

[Tobias Erbsland]

Hi!

In a program I am working on I have messages sent to the screen for various
reasons. Rather then using cout directly, I'd like to send an ostream as a
parameter to a method of an object created to centralize messages. For
instance (I'm not saying this code works):
instead of
cout << "some helpful text " << x << " " << y << endl;
I write something to the effect of
MessageCenter.message( "some helpful text " << x << " " << y << endl );
Any insight on how to implement this properly?

I would use string streams:

#include <sstream>

void foo()
{
std:stringstream msg;
msg << "some helpful text " << x << " " << y << std::endl;
MessageCenter.message( msg );
}

best regards
Tobias

 

[Tobias Erbsland]

Sorry a typo:

void foo()
{
std:stringstream msg;
msg << "some helpful text " << x << " " << y << std::endl;
MessageCenter.message( msg.str() ); // msg -> msg.str()
}

best regards
Tobias

 

[crichmon]

Sorry a typo:

void foo()
{
std:stringstream msg;
msg << "some helpful text " << x << " " << y << std::endl;
MessageCenter.message( msg.str() ); // msg -> msg.str()
}

So then would the message method take a string as input?

crichmon

 

[Tobias Erbsland]

So then would the message method take a string as input?

Yes. The message method declaration for example:

class MessageCenter
{
void message( const std::string& message );
}

best regards
Tobias

 

[crichmon]

Yes. The message method declaration for example:

class MessageCenter
{
void message( const std::string& message );
}

best regards
Tobias

Thanks a lot, that really helped me out.
crichmon