std::char_traits<char>:: compare, std::char_traits<wchar_t>:: compare, std::char_traits<char8_t>:: compare, std::char_traits<char16_t>:: compare, std::char_traits<char32_t>:: compare
|
static
int
compare
(
const
char_type
*
s1,
const
char_type
*
s2,
std:: size_t count ) ; |
(constexpr since C++17) | |
Compares the first count characters of the character strings s1 and s2 . The comparison is done lexicographically.
If count is zero, strings are considered equal.
See
CharTraits
for the general requirements on character traits for
X::compare
.
Parameters
| s1, s2 | - | pointers to character strings to compare |
| count | - | the number of characters to compare from each character string |
Return value
Negative value if s1 is less than s2 .
0 if s1 is equal to s2 .
Positive value if s1 is greater than s2 .
Complexity
Linear in count .