Undefined reference to variable = uninstantiated static variable

“Undefined reference to” error may appear when static variable is not being instantiated.

Correct way of creating static variables is:

class A
{
static int var;
}
int A::var = 0;

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s