///////////////////////////////
//
// prog_practice_5 project
//
// 9/19/22
//
// practice with pointers
//
////////////////////////
#include "mbed.h"
#include <stdio.h>

int main(void){
    setbuf(stdout, NULL); // fix buffer issue

    // splash
    printf("Pointer practice program\n\n");
    
    int a;
    int b;
    float c;
    int * a_ptr;

    // show random memory values and locations using address-of
    printf("a with value %i is stored at memory location %p\n", a, &a);
    printf("b with value %i is stored at memory location %p\n", b, &b);
    printf("c with value %f is stored at memory location %p\n\n", c, &c);

    //show initialized memory values and location using address-of
    a = 5;
    b = 6;
    c = 7.1;
    printf("a with value %i is stored at memory location %p\n", a, &a);
    printf("b with value %i is stored at memory location %p\n", b, &b);
    printf("c with value %f is stored at memory location %p\n\n", c, &c);  

    // create and show pointer variable value and location
    a_ptr = &a; 
    printf("a_ptr with value %p is stored at memory location %p\n", a_ptr, &a_ptr);
    printf("*a_ptr with value %i is stored at memory location %p\n\n", *a_ptr, a_ptr);

    // update value using indirection 
    *a_ptr = 9;
    printf("a with value %i is stored at memory location %p\n", a, &a);

    return 0;
}// end main