What will this C code do?

void main(){
int x=1;
printf("%d\n",x=2);
}

>>128
If there's no definition, it can't be allocated. If you try to use that variable, your compiler will spit out an error.

That's because the compiler isn't ignoring the variable you fucking annoying stupid shit. If the compiler would have in fact ignored the variable, like what you claim, then it wouldn't have spit out an error.

Why don't you take your own advice and write some C code?

I have you annoying stupid shit.