write "Enter x ==>";
read x;
write "x = ";
write x;
write "\n";

if x = 0  write "Enter New x =>";
if x = 0  read x;
if x ! 0  assign b = x;

write "x = ";
write x;
write "\n";

assign c = 9;
compute c = c * 2;
write "b=x c=18 d=c/b d=";

compute d = c / b;
write d;