#include <stdio.h>
int main()
{
     int a = 10;          /* a is a variable of type integer */
 
     int *int_ptr;        /* int_ptr is a variable which is a pointer to variables of type integer */
 
 
    int_ptr = &a;     /* put the address (not the contents) of a into the variable int_ptr*/
 
    /* since addresses in memory can be quite long, its best */
    /* to print them in long hexidecimal format              */
    printf ("%i %lx %x %lx %i \n", a, &a, int_ptr, &int_ptr, *int_ptr);
 
    int x = 5;
    int *ptr;
    *ptr = x;
    int *xptr = &x;
 
    printf("%i, %i, %i, %xl, %xl, %xl, %xl", x, *ptr, *xptr, &x, ptr, &ptr, xptr);
 
 
    return (0);
 
}

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