split function for strings implemented in C

split.c

int split(char *string, char sep, int n_char, char ***array_values)
{
	int n_values = 1;
	int start = 0;

	for(int x = 0; x < n_char; x++)
	{
		if(string[x] == sep)
			n_values++;
	}
	*array_values = malloc(n_values * sizeof(char**));

	for(int x = 0; x < n_values; x++)
	{
		for(int y = start; y <= n_char; y++)
		{
			if(string[y] == sep || string[y] == '\0')
			{
				(*array_values)[x] = malloc((y - start + 1) * sizeof(char*));
				for(int z = 0; z < y - start; z++)
					(*array_values)[x][z] = string[z + start];
				(*array_values)[x][y - start] = '\0';
				start = y + 1;
				break;
			}
		}
	}

	return n_values;
}

char **array_of_strings;
int n_strings = split(string, ',', strlen(string), &array_of_strings);
for(int x = 0; x < n_strings; x++)
    printf("%s\n", array_of_strings[x]);

Before terminating the program memory allocated for each string will have to be deallocated, that goes for the array of pointers as well (array_of_strings).