strrchr - cppreference.com (original) (raw)

Defined in header <string.h>
char* strrchr( const char* str, int ch ); (1)
/*QChar*/* strrchr( /*QChar*/* str, int ch ); (2) (since C23)

  1. Finds the last occurrence of ch (after conversion to char as if by (char)ch) in the null-terminated byte string pointed to by str (each character interpreted as unsigned char). The terminating null character is considered to be a part of the string and can be found if searching for '\0'.

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

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

The behavior is undefined if str is not a pointer to a null-terminated byte string.

[edit] Parameters

str - pointer to the null-terminated byte string to be analyzed
ch - character to search for

[edit] Return value

Pointer to the found character in str, or null pointer if no such character is found.

[edit] Example

#include <stdio.h> #include <string.h>   int main(void) { char szSomeFileName[] = "foo/bar/foobar.txt"; char* pLastSlash = strrchr(szSomeFileName, '/'); char* pszBaseName = pLastSlash ? pLastSlash + 1 : szSomeFileName; printf("Base Name: %s", pszBaseName); }

Output:

[edit] References

[edit] See also