Help with array Pleaase

[Ram1]

How to write a function that receives an integer array along with its length. the function calculates and returns the sum of the squares of all the odd numbers in the array?

[Ram1]

is it something like this
#include <iostream>
using namespace std;

void digitArray(int a[], int length, int b);

int main()
{
const int l = 20;
int a[l] = { 0 };
int b;
int j;

cout << "Enter a number with 5-12 digits: ";
cin >> b;

digitArray(a, l, b);

for(j=0;j<l;j++)
cout << a[j];
cout << endl;

system("pause");
return 0;
}

void digitArray(int a[], int length, int b)
{
int i;
for(i=0;i<length;i++)
{
a[i] = (b%10);
b = b/10;
}
}

[wildblue]

The array size is a constant integer. I'd usually put the const keyword on the size variable in the function too.