Doubt - Static multidimension arrays

[tsbockman via Digitalmars-d-learn]

On Tuesday, 19 January 2016 at 07:46:59 UTC, Mike Parker wrote:
> It's not that he's seeing them as special, it's just that 
> indexing them in D is different than doing so in C or C++. It 
> trips a lot of people up.

No, the difference is actually in C/C++ 's declaration syntax; 
the way that indexing works is exactly the same as in D.

This C++ code (http://codepad.org/XeVSndBP):

#include <iostream>
#include <cstring>

class Row {
     int data[10];
public:
     int& operator[](int x) {
         return data[x]; }
};

int main(void) {
     int arr2d[5][10];
     Row arrOfArrs[5];

     for(int r = 0; r < 5; ++r)
     {
         for(int c = 0; c < 10; ++c)
         {
             arr2d[r][c]     = (r * 10) + c;
             arrOfArrs[r][c] = (r * 10) + c;
         }
     }

     cout << (arr2d[4][9] == arrOfArrs[4][9]) << endl;
     cout << (memcmp(arr2d, arrOfArrs, sizeof(int)*5*10) == 0) << 
endl;

     return 0;
}


Does exactly the same thing as this D code 
(http://dpaste.dzfl.pl/1731eb86bc83):

import std.stdio;
import core.stdc.string;

alias Row = int[10];

int main() {
     int[10][5] arr2d;
     Row[5] arrOfArrs;

     for(int r = 0; r < 5; ++r)
     {
         for(int c = 0; c < 10; ++c)
         {
             arr2d[r][c]     = (r * 10) + c;
             arrOfArrs[r][c] = (r * 10) + c;
         }
     }

     writeln(arr2d[4][9] == arrOfArrs[4][9]);
     writeln(memcmp(arr2d.ptr, arrOfArrs.ptr, int.sizeof*5*10) == 
0);

     return 0;
}

The only relevant difference between the two, is that the order 
of the row and column specification is swapped in *the 
declaration*, not when indexing.