c# - What is the output, if we use a "character pointer" as an index to a character array in C++ and how to achieve this in c SHarp? -

i have vc++ character array "wchar_t arr[0x30] = { 0x0,0x1,..., 0xc...hexadecimal initialization here ......}". there 1 more c++ character pointer wchar_t * xyz.
operation like---- wchar_t ch = arr[xyz[2]] done. can kindly explain in detail happening in this, because arr[] char array , should pass integer index array right? here index passed character array "arr[] " character pointer xyz[2]. in above code suppose character 'a' stored @ xyz[2] mean indexing c++ character array this--- arr[xyz[2]] becomes arr['a']. kindly let me know. how can achieve in c sharp.. if know happening in c++ code above can myself achieve in c sharp. can kindly let me know happening here in c++ code.

what happens wchar_t stored @ xyz[2] promoted int, used index arr array.

it means that, if xyz[2] contains l'a', program exhibit undefined behavior, since arr has space 48 items l'a' promoted 97.

concerning second part of question, c# only supports pointer arithmetic inside unsafe blocks, you'll want use arrays instead:

char[] arr = new char[0x30]; char[] xyz = something(); char ch = arr[xyz[2]];