wallclock seconds since 1/1/1970 procedure

Syntax   wallclock ( var c : int )

Description   The wallclock statement is used to determine the time in seconds since 00:00:00 GMT (Greenwich Mean Time) January 1, 1970.

Example   This program tells you how many seconds since 1970.

        var seconds : string
        wallclock ( seconds )
        put "The number of seconds since 1970 is ", seconds
Details   Be warned that on some computers such as IBM PC compatibles or Apple Macintoshes, the time may not be set correctly in the operating system; in that case, the wallclock procedure will give incorrect results. Also, on IBM PC compatibles, the call is dependent on having the time zone TZ variable correctly set. On an IBM PC, the default time zone is set to PST (6 hours from GMT).

On the Apple Macintosh, the wallclock procedure returns the number of seconds since 00:00:00 local time Jan. 1, 1970.

See also   delay, time, clock, sysclock and date statements.

See also predefined unit Time.