Accessing array elements with a pointer-to-array
Stephen Tashiro
tashiro at zianet.com
Thu Jan 25 20:11:05 UTC 2024
Can the elements of an array be accessed with a pointer using the
usual indexing notation (e.g."[2][0]") for array elements? - or
must we treat the elements associated with the pointer as
1-dimensional list and use pointer arithmetic?
A more elementary question is why array index 2 is out-of-bounds
in the following
code, which won't compile:
import std.stdio;
void main()
{
ulong [3][2] static_array = [ [0,1,2],[3,4,5] ];
ulong [][] dynamic_array;
//ulong[][] *pointer;
ulong *pointer;
write(static_array);
dynamic_array = new ulong[][](3,2);
static_array[2][1] = 6;
dynamic_array[2][1] = 6;
pointer = static_array;
writef("*pointer[2][1] = %d\n", *pointer[2][1]);
pointer = dynamic_array;
writef("*pointer[2][1] = %d\n", *pointer[2][1]);
}
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