Arrays with a size determined at run time, is this valid in C++?

Question

So I was talking to my friend, helping her with a piece of code, and I always thought that arrays needed to be compile-time constants, as they are on the stack. But she said that her friend did this using this code:

#include <iostream.h>
#include <stdlib.h>
int main()
{
    int value = ' ' ;
    int sum = 0;
    int count = 0;
    cout<<"Please enter the total number of employees" <<endl;;
    cin>> value;
    int numbers[value];
    cout<<"Now enter the employees corresponding salaries" <<endl;;
    for (int k = 0; k < value; k++)
    {
        cin >> numbers[k];
    }
}

They are using Dev-C++.

Is this code suppose to work? I assume not.

Answer 1

Variable-length arrays are an extension in gcc and g++ ... so this won't work in every compiler.

For more information on gcc's support for variable length arrays, you can see the documentation here.