Thread: Hi i have a little issue

Refer to what strchr does:

Originally Posted by C11 Clause 7.24.5.2

Code:

#include <string.h>
char *strchr(const char *s, int c);

The strchr function locates the first occurrence of c (converted to a char) in the string pointed to by s. The terminating null character is considered to be part of the string.

The strchr function returns a pointer to the located character, or a null pointer if the character does not occur in the string.

In the string "bcabbacda" (i.e., we exclude the first character of the original string since you had the substring start from index 1 of the original string), 'a' does occur, hence strchr will locate that occurrence and return a pointer to it rather than a null pointer.