cast

[HP_]

have a buffer of type integer (4 bytes) with 1000 elements. what is quickest method to typecast each element to short (2 bytes) before writing it a binary opened file?.

[S_M_A]

A non-portable (doesn't work for big-endian machines) could be:

int32 arr[1000];
FILE* pF;
for( int i = 0; i < 1000; ++i ) fwrite( &arr[i], 2, 1, pF );

An endian independent version requires a temporary buffer.

Edit: I assume that you're sure that the elements only contains "16-bit values"?

[Neolisk]

Why not just cast explicitly with "(short)" ?