• Develop a solid understanding of C-strings, and how each std::string object is a wrapper around a C string

• Practice with pointer operations in C++, e.g. dereferencing, treating them as arrays (and vice versa), etc.

• You may not use any #include directives. Rather, take this opportunity to write pure C++, without the use of any library functions/classes/etc.

/** * Reverses a C-string in place (i.e., modifies the string itself). * * @param str the string to reverse * @return a pointer to the reversed string */ char *strrev(char *str) { // TODO } /** * Finds the first occurrence of the substring needle in the C-string haystack. The terminating null * chars ('\0') are not compared. * * @param haystack the string in which to search * @param needle the string for which to search * @return a pointer to the beginning of the located substring, or nullptr if the substring is not * found. */ const char *strstr(const char *haystack, const char *needle) { // TODO }