arrfun2.cpp

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// arrfun2.cpp -- functions with an array argument
#include <iostream>
const int ArSize = 8;
int sum_arr(int arr[], int n);
// use std:: instead of using directive
int main()
{
    int cookies[ArSize] = {1,2,4,8,16,32,64,128};
//  some systems require preceding int with static to
//  enable array initialization

	std::cout << cookies << " = array address, ";
//  some systems require a type cast: unsigned (cookies)

	std::cout << sizeof cookies << " = sizeof cookies\n";
    int sum = sum_arr(cookies, ArSize);
	std::cout << "Total cookies eaten: " << sum <<  std::endl;
    sum = sum_arr(cookies, 3);        // a lie
	std::cout << "First three eaters ate " << sum << " cookies.\n";
	sum = sum_arr(cookies + 4, 4);    // another lie
	std::cout << "Last four eaters ate " << sum << " cookies.\n";
    return 0;
}

// return the sum of an integer array
int sum_arr(int arr[], int n)
{
    int total = 0;
	std::cout << arr << " = arr, ";
// some systems require a type cast: unsigned (arr)

	std::cout << sizeof arr << " = sizeof arr\n";
    for (int i = 0; i < n; i++)
        total = total + arr[i];
    return total; 
}