Dynamic array in Stack?

Question

Is this correct ? This is compiled with g++ (3.4) sucessfully.

int main()
{
    int x = 12;
    char pz[x]; 
}

Answer 1

G++ supports a C99 feature that allows dynamically sized arrays. It is not standard C++. G++ has the -ansi option that turns off some features that aren't in C++, but this isn't one of them. To make G++ reject that code, use the -pedantic option:

$ g++ -pedantic junk.cpp
junk.cpp: In function ‘int main()’:
junk.cpp:4: error: ISO C++ forbids variable-size array ‘pz’