strrchr

From cppreference.com
< c‎ | string‎ | byte
Defined in header <string.h>
char *strrchr( const char *str, int ch );

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'.

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

Parameters

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

Return value

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