How to save the address of a variable / Use of pointer in C programming!!

 #include <stdio.h>

#include <stdlib.h>

#include <ctype.h>

#include <string.h>

#include <math.h>

int main()

{

    int dog = 19;

    printf("Address \t Name \t Value\n");

    printf("%p  %s \t %d \n",&dog,"dog",dog);

     int*Gdog =  &dog;

          printf("%p  %s \t %d \n",Gdog,"dog",dog);

           printf("%p  %s \t %d \n",&Gdog,"Gdog",Gdog);

    return 0;

}