Recall that in C$,$ booleans are ints, with $0$ representing false and any other number representing true. Assume left$-$to$-$right evaluation.

What is the output of the following C program:

int fand $($int a$,$ int b$)\{$ return a && b; $\}$

int main $()\{$

int x $=20$;

int z $=$ fand $(($x$+=1,0),($x$*=2,1))$;

printf $("$x$=\%$d$,$ z$=\%$d

$",$ x$,$ z$)$;

$\}$