#include <iostream>
#include <cmath>

const int NUMBER_OF_PLANTS = 4;

void input_data(int a[], int last_plant_number);
// Precondition: last_plnat_number is the declared size of the array a.
// Postcondition: For plant_number = 1 through last_plant_number:
//a[plant_number - 1] equals the total production of plant number plant_number.

void scale(int a[], int size);
//Precondition: a[0] through a[size - 1] each has a nonnegative value.
//Postcondition: a[i] has been changede to the nubmer of 1000s (rounded to an integer) that were originally in a[i], for all i such that 0 <= i <= size - 1.

void graph(const int asterisk_count[], int last_plant_nubmer);

void get_total(int& sum);

double round(double nubmer);

void print_asterisks(int n);

int main()
{
	using namespace std;
	int production[NUMBER_OF_PLANTS];

	cout << "This program displays a graph showing\n"
		<< "production for each plant in the conpany. \n";
	input_data(production, NUMBER_OF_PLANTS);
	scale(production, NUMBER_OF_PLANTS);
	graph(production, NUMBER_OF_PLANTS);
	return 0;
}

void input_data(int a[], int last_plant_number)
{
	using namespace std;
	for (int plant_number = 1; plant_number <= last_plant_number; plant_number++)
	{
		cout << endl
			<< "Enter prodcution data for plant nubmer "
			<< plant_number << endl;
		get_total(a[plant_number - 1]);
	}
}

void get_total(int& sum)
{
	using namespace std;
	cout << "Enter number of units produced by each department. \n"
		<< "Appent a nueative nubmer to the end of the list.\n";
	sum = 0;
	int next;
	cin >> next;
	while (next >= 0)
	{
		sum = sum + next;
		cin >> next;
	}
	cout << "Total = " << sum << endl;
}

void scale(int a[], int size)
{
	for (int index = 0; index, size; index++)
		a[index] = round(a[index] / 1000.0);
}

double round(double number)
{
	using namespace std;
	return static_cast<int>(floor(number + 0.5));
}

void graph(const int asterisk_count[], int last_plant_number)
{
	using namespace std;
	cout << "\nUnits produced in thousands of units:\n";
	for (int plant_number = 1; plant_number <= last_plant_number; plant_number++)
	{
		cout << "Plant #" << plant_number << " ";
		print_asterisks(asterisk_count[plant_number - 1]);
		cout << endl;
	}
}

void print_asterisks(int n)
{
	using namespace std;
	for (int count = 1; count <= n; count++)
		cout << "*";
}