std::strstr
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Defined in header
<cstring>
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.
Contents
[edit] Parameters
haystack
-
pointer to the null-terminated byte string to examine
needle
-
pointer to the null-terminated byte string to search for
[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
Run this code
#include <cstring> #include <iomanip> #include <iostream> 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
(public member function of
std::basic_string<CharT,Traits,Allocator>) [edit]
C documentation for strstr