//ic210 section 4002
//19 oct 2009
//practice arrays: read from file, 
//compute min, max, std avg
// the input file looks like this:
//    N = 3
//    DATA:	
//    67
//    61
//    82

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

//prototypes
int* readArrayFromFile (string, int&);
void calcMinAndMax (int*, int, int&, int&);
double calcAverage (int*, int);
double calcStdDev (int*, int, double);

int main() {

	// Read the array 
	int N;
	int* myArray = readArrayFromFile("numbers.txt", N);
	cout << "Got array of size: " << N << endl;

	// Get the min and max
	int min, max;
	calcMinAndMax(myArray, N, min, max);
	cout << "Min is " << min << endl;
	cout << "Max is " << max << endl;

	// Compute the average
	/* Comment this so we can run the program
	when the functions are not defined

	double average;
	average = calcAverage(myArray, N);
	cout << "Average is " << average << endl;

	// Compute standard deviation
	cout << "Std. deviation is " << calcStdDev(myArray, N, average) << endl;
	*/
	return 0;
}

int* readArrayFromFile (string fname, int& nval)
{
	string junk;

	ifstream fin;
	fin.open(fname.c_str());
	if(!fin)
	{
		cout << "You have ERROR in opening file:"
			<< fname;
		exit(1);
	}

	fin >> junk >> junk >> nval;
	fin >> junk;
	int* myArray = new int[nval];
	for(int i=0;i < nval; i++)
	{
		fin >> myArray[i]; 
	}
	return myArray;	
}

void calcMinAndMax (int* array, int N, 
					int& min, int& max)
{
	//initialize min and max
	min = array[0];
	max = array[0];


	//compute min and max
	for (int j = 0; j < N; j++)
	{
		if (min > array[j])
		{
			min = array[j];
		}
		if (max < array[j])
		{
			max = array[j];
		}
	}

	return;

}