pointers_extra.c

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>

int main() {

//uint32_t * nums = (uint32_t *) 0x0001; // 0x0001 | 01 00 00 00, 02 00 00 00, 03 00 00 00
// nums = an integer of 0x0001 - not a legal address
// or
//uint32_t nums[] = { 1, 2, 3 };
// nums = an integer pointer generated by the compiler linker; points to somwhere in the data section of the executable
// pointer is legal
//0x0001 | 01 00 00 00, 02 00 00 00, 03 00 00 00
    uint32_t *nums = (uint32_t *) 0x0001;

    printf("%i \n", *nums);   // = 1
    printf("%i \n", nums[0]); // = 1
    printf("%i \n", nums[1]); // = 2
    printf("%i \n", nums[2]); // = 2


    printf("%p \n", nums);        // 0x0001
    printf("%p \n", &nums[0]);    // 0x0001
    printf("%p \n", &nums[1]);    // 0x0001 + sizeof(uint32_t)
    printf("%p \n", &nums[2]);    // 0x0001 + sizeof(uint32_t) + sizeof(uint32_t)
    int a = 2;
    int *p = &a;
    printf("%d\n", p[10]);
    //printf("%d", sizeof(int));

    int *array_int;
    array_int = malloc(sizeof(int) * 10);
    char *string = "first string";
    char **str;
    str = malloc(sizeof {})
    int index = 0;
    while (string[index]) {
        printf("%c\n", string[index]);
        index++;
    }
    index = 0;
    while (index < 10) {
        array_int[index] = index;
        index++;
    }

    int a = 0;
    int *p = &a;

    printf("%p\n", p);
    printf("%p\n", &p[10]);

    printf("%p\n", p + 10);
}