Variable-length array VLA in C

It is interesting to see the variable-length array (VLA) in C primer plus occasionally.

 

In his c primer plus and C ++ primer plus, the author clearly states that the number of elements in the group must be an integer constant rather than a variable when defining an array. But in C, the variable length array VLA is not mentioned in c ++. I don't know why? It must be a bit ambiguous to use VLA.

 

I tried to write a small program for testing, and compilation and running were normal.

 

# Include <iostream>

 

Void VLA (INT length)

{

Int V [length];

 

For (INT I = 0; I <length; I ++)

{

V [length] = I;

STD: cout <V [I] <"/N ";

}

 

Return 0;

}

 

Int main ()

{

Int length = 0;

 

STD: cout <"Enter length :";

STD: CIN> length;

 

VLA (length );

 

Return 0;

}

 

It is also good to handle dynamic memory allocation! Without memory leakage, it is convenient and easy.

 

Only the author of C primer plus pointed out that it is necessary to determine that the compiler version can support the VLA feature. Haha!