The programing language is C

/*Code starts here

NOTE: You should NOT use array notation inside your functions. Use only * pointer notation for any code that you write. * */

#include #include // NO additional imports allowed. You *can* make helper functions if you wish.

#define MAX_STRING_LEN 1024

char *find_last_substring(char *str, char *a) { /* * Given a string `str` and another string `a`, return a pointer to the start * of the *LAST* occurrence of `a` in `str`. * * For instance, if we had: (here) * V * char str[MAX_STRING_LEN] = "Hello everyone, Hello world!" * char *res = find_last_substring(str, "Hello"); * * then, we would except `res` to be a pointer to the character marked above. * In particular, since the second "Hello" is at index 16, we should get * the following: * * res - str == 16; (This is pointer arithmetic) * * If `a` is not a valid substring of `str`. return NULL. */

return NULL; // Replace with correct return }

void split_vowels(char *str, char *vowels) { /* * Move all of the vowels from `str` (in the order of appearance) to the * string `vowels`. (ie, after the function call `str` should not have any * vowels in it). You may assume there is enough space allocated in `vowels`. * * Look at the test case below for an example. */

return; // Not returning anything. `str` and `vowels` modified directly. }

// ----------------------------------------------------------------------------

// Do not change the lines above and below the main function. You are free to change anything // inside the main() function itself. #ifndef __testing__ int main() { char my_str[MAX_STRING_LEN] = "many many people have many many hobbies"; char *res = find_last_substring(my_str, "many"); if (res - my_str == 27) { printf("- find_last_substring() returned the correct result! "); } else { printf("! find_last_substring() did not work properly. "); }

printf("---------------------------------------------------------------- ");

char str[MAX_STRING_LEN] = "This sentence has many vowels! AEIOU"; char vowels[MAX_STRING_LEN]; split_vowels(str, vowels);

printf("(Expected Result) str: \"Ths sntnc hs mny vwls! \", " "vowels: \"ieeeaaoeAEIOU\" "); printf("(Your Solution) str: \"%s\", vowels: \"%s\" ", str, vowels); } #endif

You don't have to do anything for the main function I just kept it here to help with testing.

Please do NOT include any other c libraries (I've asked this question on chegg and libraries are being used when they are not allowed to be included.

Also please make sure to USE pointers and not arrays directly

Thanks for the help :)