$a="aBC";$a++;print('$a++ = ',$a,"\n");
$a="aBC";++$a;print('++$a = ',$a,"\n");
$a="aBC";$res=$a++; print('$a = ',$a,' $res=$a++ : ',$res,"\n");
$a="aBC";$res=++$a; print('$a = ',$a,' $res=++$a : ',$res,"\n\n");

$a="aBC";$a--;print('$a-- = ',$a,"\n");
$a="aBC";--$a;print('--$a = ',$a,"\n");
$a="aBC";$res=$a--; print('$a = ',$a,' $res=$a-- : ',$res,"\n");
$a="aBC";$res=--$a; print('$a = ',$a,' $res=--$a : ',$res,"\n\n");

$a="AGZZZ";;$a++;print('$a++ = ',$a,"\n");
$a="AGZZZ";;++$a;print('++$a = ',$a,"\n");
$a="AGZZZ";;$res=$a++; print('$a = ',$a,' $res=$a++ : ',$res,"\n");
$a="AGZZZ";;$res=++$a; print('$a = ',$a,' $res=++$a : ',$res,"\n\n");

print ('press ENTER to EXIT');
$in = <STDIN>;