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#include <iostream>
#include <iomanip>
using namespace std;
// cin.get() <-------------- used to let the user read the screen
// Function prototypes
void calcSales(const int [], const double [], double [], int);
void showOrder(const double [], const int [], int);
void dualSort(int [], double [], int);
void showTotals(const double [], const int [], int);
// NUM_PRODS is the number of products produced.
const int NUM_PRODS = 12; // This is were i would like to change values which go 1,2,3... in output to say product id 10002,10003,etc.
int units[NUM_PRODS];
int main ()
{
// Array with product ID numbers
int id[NUM_PRODS] = {1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 11, 12};
// Array with number of units sold for each product
for (int count = 0; count < NUM_PRODS; count++)
{
cout << "Enter the number of units sold by product id "
<< (count + 1) << ": ";
cin >> units[count];
cin.get();
}
// Array with the product's prices
double prices[NUM_PRODS] = {11.95, 14.97, 9.99, 8.72, 54.99, 82.92,
2.99, 11.99, .99, 8.49, 7.62, 4.99};
// Array to hold the computed sales amount
double sales[NUM_PRODS];
// Calculate each product's sales
calcSales( units, prices, sales, NUM_PRODS);
// Sort the elements in the sales array in decending order
// and shuffle the id numbers to keep the parallel.
dualSort( id, sales, NUM_PRODS);
// Set the numeric output formatting.
cout << setprecision (2) << fixed << showpoint;
// Display the products and sales amounts
showOrder(sales, id, NUM_PRODS);
// Display total units sold and total sales
showTotals(sales, units, NUM_PRODS);
return 0;
}
//***************************************************************
// Definition of CalcSales. Accepts units, prices, and sales *
// arrays as arguments. The size of these arrays is passed *
// into the num parameter, This function calculates each *
// product's sales by multiplying its units sold by each unit's *
// price. The result is stored in the sales array. *
//***************************************************************
void calcSales(const int units[], const double prices[], double sales[], int num)
{
for (int index = 0; index < num; index++)
sales[index] = units[index] * prices[index];
}
//****************************************************************
// Definition of function dualSort. Accepts ids and sales arrays *
// as arguments. The size of these arrays is passed into size *
// This function performs a descending order selection sort on *
// the sales array. The elements of the id array are exchanged *
// identically as those of the sales array. Size is the number *
// of elements in each array. *
//****************************************************************
void dualSort(int id[], double sales[], int size)
{
int startScan, maxIndex, tempid;
double maxValue;
for (startScan = 0; startScan < (size - 1); startScan++)
{
maxIndex = startScan;
maxValue = sales[startScan];
tempid = id[startScan];
for(int index = startScan + 1; index < size; index++)
{
if (sales[index] > maxValue)
{
maxValue = sales[index];
tempid = id[index];
maxIndex = index;
}
}
sales[maxIndex] = sales[startScan];
id[maxIndex] = id[startScan];
sales[startScan] = maxValue;
id[startScan] = tempid;
}
}
void showOrder(const double sales[], const int id[], int num)
{
cout << "Product Number\t\tSales\n";
cout << "-------------------------------------\n";
for (int index = 0; index < num; index++)
{
cout << id[index] << "\t\t\t$";
cout << setw(8) << sales[index] << endl;
}
cout << endl;
}
//*************************************************************
// Show totals function
void showTotals(const double sales[], const int units[], int num)
{
int totalUnits = 0;
double totalSales = 0.0;
for (int index = 0; index < num; index++)
{
totalUnits += units[index];
totalSales += sales[index];
}
cout << "-------------------------------------\n";
cout << " Total Units sold: " << totalUnits << endl;
cout << " Total Sales: $" << totalSales << endl;
cin.get();
}
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