Variable array bound

Stuart Brooks
Wed Mar 8 14:46:00 GMT 2006


I was surprised to find that the following code compiles (and runs)
successfully under gcc 4.0.2 (and 3.3.3) :

void SomeFunc(int array_size)
  int arr[array_size];
  // use array ...

Should this compile? My version of Stroustrup's 'The C++ Programming
Language (c) 2000' states in section 5.2: "The number of elements of the
array, the array bound, must be a constant expression".

Is this by any chance a gcc extension?


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