Array arguments are passed to function by reference

example:

#include <iostream>

using namespace std;

void function(int ArrayPassed[], unsigned len);

int main()
{
    int array[] = {1, 2, 3, 4, 5};
    unsigned length = 5;

    cout << endl << "before fnction()" << endl;
    for(unsigned i = 0; i < length; i++){
        cout << array[i] << " ";
    }
    function(array, length);

    cout << endl << "after fnction()" << endl;
    for(unsigned i = 0; i < length; i++){
        cout << array[i] << " ";
    }

    cout << endl;
    return 0;
}

void function(int ArrayPassed[], unsigned len){
    for(unsigned i = 0; i < len; i++){
        ArrayPassed[i] *= ArrayPassed[i];
    }
}