After the pointer manipulations are done, the layout in memory is represented by the diagrams. (The addresses are arbitrary, but relative)

Given the declarations: 

char *strings[] = {"First", "Second", "Third", "Fourth"};
char **ppstr = strings;
the output is as follows: 
printf("%c\n", **ppstr);   /* a character, 'F'  */
printf("%s\n", *ppstr);    /* a string, "First" */
printf("%c\n", *ppstr[0]); /* a character, 'F'  */
printf("%s\n", &**ppstr);  /* a string, "First" */


++*ppstr;                /* indirect, inc contents (pointer) */
printf("%c\n", **ppstr); /* a character, 'i' */
printf("%s\n", *ppstr);  /* a string, "irst" */







(*++ppstr)++;  /* inc ppstr (pointer), indirect, inc contents (pointer) */
(*ppstr)++;    /* indirect, inc contents (pointer)                      */
printf("%c\n", **ppstr); /* a character, 'c' */
printf("%s\n", *ppstr);  /* a string, "cond" */






ppstr += 2;  /* inc ppstr (pointer to pointer) by 2 (8)      */
*ppstr += 4; /* inc contents of ppstr (pointer to char) by 4 */
printf("%c\n", **ppstr); /* a character, 't' */
printf("%s\n", *ppstr);  /* a string, "th"   */
Complete code for the above examples.