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// This program gets five days of sales data from the user
// and displays the total, average, highest, and lowest amounts.
#include <iostream>
#include <iomanip>
#include <cstdlib>
using namespace std;
// Function prototypes
double sumArray(double[], int);
double getHighest(double[], int);
double getLowest(double[], int);
int getDays();
int main()
{
//const int NUM_DAYS = 5; // Number of days
double sales[100], // To hold sales amounts
total, // To hold the total sales
average, // To hold the average
highest, // To hold the highest sales
lowest; // To hold the lowest sales
// Get the sales data.
int days;
// Instructor Comment: Correct function call
days = getDays();
for (int count = 0; count < days; count++)
{
cout << "Day " << (count +1) <<": ";
cin >> sales[count];
}
// Get the total sales.
total = sumArray(sales, days);
// Calculate the average.
average = total / days;
// Find the highest sales amount.
highest = getHighest(sales, days);
// Find the lowest sales amount.
lowest = getLowest(sales, days);
// Display the results.
cout << fixed << showpoint << setprecision(2);
cout << "The total sales are $" << total << endl;
cout << "The average sales amount is $" << average << endl;
cout << "The highest sales amount is $" << highest << endl;
cout << "The lowest sales amount is $" << lowest << endl;
system("PAUSE");
return 0;
}
//***************************************************
// Definition of sumArray *
// This function accepts a double array and its size *
// as arguments. The sum of the array's elements *
// is returned as an double. *
//***************************************************
double sumArray(double array[], int size)
{
double total = 0; // Accumulator
int count = 0;
while(count < size)
{
count++;
total += array[count];
}
return total;
/*for (int count = 0; count < size; count++)
total += array[count];
return total;*/
}
//****************************************************
// Definition of getHighest *
// This function accepts a double array and its size *
// as arguments. The highest value in the array is *
// returned as an double. *
//****************************************************
double getHighest(double array[], int size)
{
double highest;
highest = array[0];
int count = 1;
do
{
count+1;
}while (count < size);
if (array[count] > highest)
highest = array[count];
return highest;
}
//****************************************************
// Definition of getLowest *
// This function accepts a double array and its size *
// as arguments. The lowest value in the array is *
// returned as an double. *
//****************************************************
double getLowest(double array[], int size)
{
double lowest;
lowest = array[0];
do
{
if (array[count] < lowest)
lowest = array[count];
}while(count < size);
return lowest;
}
int getDays()
{
int days;
do{
cout << "How many sales days are you analyzing?\n";
cin >> days;
if (days < 0)
cout << "Days cannot be negative.\n";
else if(days > 100)
cout << "Days exceed array size.\n";
}while (days < 0 || days > 100);
return days;
}
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