Consider the following program, which consists of two object modules:

$1/*$ foo$6.$c $*/$

$2$ void p$2($void$)$;

$3$

$4$ int main$()$

$5\{$

$6$ p$2()$;

$7$ return $0$;

$8\}$

$1/*$ bar$6.$c $*/$

$2$ #include

$3$

$4$ char main;

$5$

$6$ void p$2()$

$7\{$

$8$ printf$("0$x$\%$x

$",$ main$)$;

$9\}$

When this program is compiled and executed on a Linux system, it prints the string

$0$x$55$

$$ and terminates normally, even though p$2$ never initializes variable main.

Can you explain this?