Tests Multi-dimensional arrays and accessing memory chunks using pointers

credentials_buffer.c

#include <stdio.h>

int main(void*) {
    /* create an array of strings (arrays of characters) */
    /* This buffer is allocated in contigous memory chunks */
    const char credentials[][255] = {"Andrew", 
                                     "ZirqfRopWpedsS0012#24"};
    
    /* get an element from the 1st dimension */                            
    const char* user_cred = credentials[0]; /* or use *(credentials + 0) */
    const char* passwd_cred = credentials[1]; /* or use *(credentials + 1) */

    printf("%s\n", user_cred);
    printf("%s\n", passwd_cred);

    /* get an element from the 2nd dimension */
    const char user_cred_c0 = user_cred[0]; 
    const char user_cred_c1 = credentials[0][1];
    const char user_cred_c2 = *(user_cred + 2);
    const char user_cred_c3 = *(*(credentials + 0) + 3);
    const char user_cred_c4 = *(*(credentials + 0) + 4);
    /* HACK !! Convert into a single buffer */
    const char user_cred_c5 = *(((const char*) credentials) + 5);

    printf("%c", user_cred_c0);
    printf("%c", user_cred_c1);
    printf("%c", user_cred_c2);
    printf("%c", user_cred_c3); 
    printf("%c", user_cred_c4);
    printf("%c", user_cred_c5);
    printf("\n");

    return 0;
}