#include <stdio.h>
int main(int argc, char *args[])
{
    int x = 10, y = 20; // x and y are integers

    int *p; // p is a pointer to an integer

    p = &x;  //the value of p is the address of x

    printf("Part 1:\n");
    printf("x = %d\n", x); //value of x
    printf("p = %d\n", p); //value of p
    printf("*p = %d\n", *p); //the contents of the location to which p points


    *p = *p + 1; //add one to the contents of the location to which p points
 
    printf("\nPart 2:\n");
    printf("x = %d\n", x);
    printf("p = %d\n", p);
    printf("*p = %d\n", *p);


    p = p+1; //add one to p. p now points to a new location. what does p point to?


    printf("\nPart 3:\n");
    printf("x = %d\n", x);
    printf("p = %d\n", p);
    printf("*p = %d\n", *p);



    printf("\nPart 4:\n");
    printf("y = %d\n", y);
 }