time calculation

From: * Tong * <sun_tong_001@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 30 Oct 2006 10:01:31 -0500

Hi,

I'm trying to understand tcl's time calculation:

% clock format [expr {([clock scan 09:51:16] - [clock scan 00:00:00])}] -format "%H:%M:%S"
04:51:16

I'd think the result'd be 09:51:16, why 04:51:16?

thanks

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http://xpt.sourceforge.net/

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