wcsstr - cppreference.com (original) (raw)

1. Finds the first occurrence of the wide string src in the wide string pointed to by dest. The terminating null characters are not compared.

2. Type-generic function equivalent to (1). Let T be an unqualified wide character object type.

• If dest is of type const T*, the return type is const wchar_t*.
• Otherwise, if dest is of type T*, the return type is wchar_t*.
• Otherwise, the behavior is undefined.

If a macro definition of each of these generic functions is suppressed to access an actual function (e.g. if (wcsstr) or a function pointer is used), the actual function declaration (1) becomes visible.

[edit] Parameters

[edit] Return value

Pointer to the first character of the found substring in dest, or a null pointer if no such substring is found. If src points to an empty string, dest is returned.

[edit] Example

#include <stdio.h> #include <locale.h> #include <wchar.h>   int main(void) { setlocale(LC_ALL, "ru_RU.UTF-8");   wchar_t str[5][64] = { L"Строка, где есть подстрока 'но'.", L"Строка, где такой подстроки нет.", L"Он здесь.", L"Здесь он.", L"Его нет." };   for (size_t i = 0; i < 5; ++i) { if (wcsstr(str[i], L"но")) { wprintf(L"%ls\n", str[i]); } } }

Output:

Строка, где есть подстрока 'но'.

[edit] References

• C11 standard (ISO/IEC 9899:2011):

• 7.29.4.5.6 The wcsstr function (p: 437)

• C99 standard (ISO/IEC 9899:1999):

• 7.24.4.5.6 The wcsstr function (p: 383)

[edit] See also

| | finds the first occurrence of a wide character in a wide string (function) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | finds the last occurrence of a wide character in a wide string (function) [edit] | | |