Is there a function in c that will return the index of a char in a char array?

Question

Is there a function in c that will return the index of a char in a char array?

For example something like:

char values[] = \"0123456789ABCDEFGHIJKLMN         


        

Answer 1

Safe index_of() function that works even when it finds nothing (returns -1 in such case).

#include 
#include 
ptrdiff_t index_of(const char *string, char search) {
    const char *moved_string = strchr(string, search);
    /* If not null, return the difference. */
    if (moved_string) {
        return moved_string - string;
    }
    /* Character not found. */
    return -1;
}