Comma separated Number showing correctly on simulator but not on iPad

Question

To show a comma separated number I set local as

setlocale(LC_NUMERIC, "en_US");

then compose a message

char msg[100]={0};
sprintf(msg,"Reach a score %'ld.",mission.param1);
mission.msg=msg;

Then I display this message as :

sprintf( msgStr,"%s",mission.msg.c_str());

_missionStatusLabel1=CCLabelTTF::create(msgStr, "MarkerFelt-Thin", 52 * _scaleY, CCSizeMake(1000 * _scaleX,0),
kCCTextAlignmentLeft);

_missionStatusLabel1->setPosition( ccp(_screenSize.width * 0.53f, _screenSize.height*0.704f) );

Problem is, on simulator it shows correct format like for 25000 it shows 25,000 but when I run on iPad(ios7) it simply show 25000 without comma.

what I may be missing ?

EDIT:

Or How would you show a comma separated number ?

Answer 1

As you can see In my code above I am setting locale using the c++ setLocale. But this code showed comma only in simulator but not actual device . So I tried NSNumberFormatter class and everything worked just perfect. I picked the code from NSNumberFormatter with comma decimal separator and just wrapped under c++ interface for use