That syntax may be valid for C99 compliant code, but is not valid for earlier versions of C. I believe GCC supports the C99 standard. The Microsoft compiler likely doesn't, especially if you're using Visual Studio 6, which I believe was released around 1998 or so (according to the about box anyway). So, neither compiler is necessarily wrong - they just support different versions of the C standard. Thanks, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Sisyphus Sent: Thursday, January 27, 2005 2:59 PM To: gcc Subject: gcc v msvc anomaly Hi, --- alloc.c --- #include <stdio.h> int main() { int i, c = 5, j[c]; for(i = 0; i < c; ++i) { j[i] = i; printf("%d ", j[i]); } printf("\n"); return 0; } -------------- Should that simple script compile and run as expected ? With my MinGW port of gcc it does - but with Microsoft compilers it won't even compile. I get: alloc.c(4) : error C2057: expected constant expression alloc.c(4) : error C2466: cannot allocate an array of constant size 0 alloc.c(4) : error C2133: 'j' : unknown size Is the Microsoft compiler right in rejecting the code ? If so, has the issue been addressed in later versions of gcc ? Cheers, Rob
