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NAME
     tt_is_err - check status value

SYNOPSIS
     #include <Tt/tt_c.h>
     int tt_is_err(Tt_status s);

DESCRIPTION
     The tt_is_err() function checks whether a status value is  a
     warning or an error.

     The s argument is the Tt_status code to check.

RETURN VALUE
     Upon successful completion, the tt_is_err() function returns
     one of the following integers:

        0   The Tt_status is either a warning or TT_OK.

        1   The Tt_status is an error.

SEE ALSO
     tt_c(5).

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