std::strstr - cppreference.com (original) (raw)

| Defined in header | | | | ----------------------------------------------------------------------------- | | | | const char* strstr( const char* haystack, const char* needle ); | | | | char* strstr( char* haystack, const char* needle ); | | |

Finds the first occurrence of the byte string needle in the byte string pointed to by haystack. The terminating null characters are not compared.

[edit] Parameters

[edit] Return value

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

[edit] Example

#include #include #include   int main() { const char* str = "Try not. Do, or do not. There is no try."; const char* target = "not";   for (const char* result = str; (result = std::strstr(result, target)); ++result) std::cout << "Found " << std::quoted(target) << " starting at (" << result - str << "): " << std::quoted(result) << '\n'; }

Output:

Found "not" starting at (4): "not. Do, or do not. There is no try." Found "not" starting at (19): "not. There is no try."

[edit] See also

| | finds the first occurrence of the given substring (public member function of std::basic_string<CharT,Traits,Allocator>) [edit] | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | finds the first occurrence of a wide string within another wide string (function) [edit] | | | finds the first occurrence of a character (function) [edit] | | | finds the last occurrence of a character (function) [edit] | | |