clock_t
clock(
void
)
)
function
determines the amount of processor time used since the invocation of the
calling process, measured in
CLOCKS_PER_SEC
s.
)
function returns the amount of time used unless an error occurs, in which
case the return value is -1.
)
function conforms to
ANSI X3.159-1989 (``ANSI C89'') .