C Pointer to Pointer

int i = 5, *ptr;
int **ptrptr;     //declaration of pointer with additional asterisk
ptr = &i;
ptrptr = &ptr;     //assigning a pointer variable address to pointer (ptrptr)

#include <stdio.h>
int main()
{
int i = 5;
int *ptr, **ptrptr;
ptr = &i;
ptrptr = &ptr;
printf("The value of i = %d ", i);
printf("\nThe value of ptr = %d ", *ptr);
printf("\nThe value of ptrptr = %d ", **ptrptr);
return 0;
}

#include <stdio.h>
void function(char**);
int main()
{
char *arr[] = { "ant", "bat", "cat", "dog", "egg", "fly" };
function(arr);
return 0;
}
void function(char **ptr)
{
char *ptr1;
ptr1 = (ptr += sizeof(int))[-2];
printf("%s\n", ptr1);
}