int x; != int x=0;

Forum 2005-2010 (read only) General Bar Sport
2

I am not sure if I understand your message.

int x;
outside of a function should be the same as
int x=0;
outside of a function. It might be that they are stored in different sections but this depends on the compiler and the compiler parameters.

Or was x a local variable of a function in your sketch?