Pointer arithmetic

/* 1601.c: Pointer arithmetic */
#include <stdio.h>

main()
{
char *ptr_ch;
int *ptr_int;
double *ptr_db;
/* char pointer ptr_ch */
printf("Current position of ptr_ch: 0x%p\n", ptr_ch);
printf("The position after ptr_ch + 1: 0x%p\n", ptr_ch + 1);
printf("The position after ptr_ch + 2: 0x%p\n", ptr_ch + 2);
printf("The position after ptr_ch - 1: 0x%p\n", ptr_ch - 1);
printf("The position after ptr_ch - 2: 0x%p\n", ptr_ch - 2);
/* int pointer ptr_int */
printf("Current position of ptr_int: 0x%p\n", ptr_int);
printf("The position after ptr_int + 1: 0x%p\n", ptr_int + 1);
printf("The position after ptr_int + 2: 0x%p\n", ptr_int + 2);
printf("The position after ptr_int - 1: 0x%p\n", ptr_int - 1);
printf("The position after ptr_int - 2: 0x%p\n", ptr_int - 2);
/* double pointer ptr_ch */
printf("Current position of ptr_db: 0x%p\n", ptr_db);
printf("The position after ptr_db + 1: 0x%p\n", ptr_db + 1);
printf("The position after ptr_db + 2: 0x%p\n", ptr_db + 2);
printf("The position after ptr_db - 1: 0x%p\n", ptr_db - 1);
printf("The position after ptr_db - 2: 0x%p\n", ptr_db - 2);

return 0;
}