Question

Possible Duplicate:
What is useful about a reference-to-array parameter?
How do I use arrays in C++?

I am trying to pass the arrays by reference. The problem is I am getting errors for passing these arrays.

error C2664: ‘InitializeArrays’ : cannot convert parameter 1 from ‘int [64]’ to ‘int (&)[]’

Here is the code:

void InitializeS(int (&s)[], int (&BeforeDecimal1)[]);

int main()
{
   int BeforeDecimal[128],s[128];

   InitializeS(s,BeforeDecimal);

   return 0;
}

void InitializeS(int (&s)[], int (&BeforeDecimal1)[])
{
    for(int i=0;i<128;i++)
    {
        s[i]=0;
        BeforeDecimal1[i]=0;
    }
}

What am I doing wrong?

Answer 1

In C++ there is unlike as in C no concept of compatible types and the type T[] is unrelated to T[N]. You need to make the reference have a size and the size must equal the one of the array you pass.

C++ also bans references to arrays without bounds as function parameter types (perhaps for this reason).