int index(const char *s
, const char *subs
) int index(const char *s
, const char *subs
, intstart
)
The index
function locates the position of
the first occurrence of the substring
(subs
) in the
s
string, starting at the optional
position start
. If the specified
value of start
is less than
0
, it is implicitly set to
0
. If s
is an
empty string, index
returns
0
. If no match is found for
subs
in s
,
index
returns 1
.