clear
x = mark_test( "already_reset" )
if $x == 00
// already_reset is exist
x = mark_set( "already_reset", 88 )
x = mark_set( "eee", 88 )
zzz = 00
else
zzz = add( $zzz, 01 )
endif
x = mark_get( "already_reset" )
if $x == ""
?
pause
endif
x = mark_del( "eee" )
x = mark_test( "eee" )
if $x != 00
?
pause
endif
--------------首次运行
//x = 00
//x = 00
//x = 00
//zzz = 00
//x = 88
//x =
//x = 00
--------------二次运行
//x = 01
//zzz = 01
//x = 88
//x =
//x = 00