std::strstr
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.
Parameters
| haystack | - | pointer to the null-terminated byte string to examine |
| needle | - | pointer to the null-terminated byte string to search for |
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.
Example
#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."
See also
| finds the first occurrence of the given substring (public member function of std::basic_string<CharT,Traits,Allocator>) |
|
| finds the first occurrence of a wide string within another wide string (function) |
|
| finds the first occurrence of a character (function) |
|
| finds the last occurrence of a character (function) |
|
C documentation for strstr |
|
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