Question

Write a program that reads raw data from a file that contains an inventory of items. The items should be sorted by name, and the total value of the inventory calculated. A nice report is printed to a data file including the sorted inventory data.

Answer 1

Answer:

//C++ code

#include<iostream>

#include<fstream>

#include<iomanip>

using namespace std;

/*===============================================*/

// a structure called prod

struct prod

{

string name;// – a string, assumed to have no spaces

double price; // –adollaramount

int inStock; // – the number of items currently in stock.

};

//Fucntion Prototypes

void readInventory(prod products[], int& size);

/*===============================================*/

/*returns: a dollar amount, the total value of the inventory*/

double totalValue(prod products[], int size);

/*===============================================*/

// Sorts the given array by name

void sort(prod products[], int size);

/*===============================================*/

/*a report to a file called “report.txt”.

When the file fails to open, print

“Unable to open output file.” and end.*/

void writeReport(prod products[], int size);

/*===============================================*/

//Function definitions

/*===============================================*/

void writeReport(prod products[], int size)

{

ofstream outfile("report.txt");

outfile << fixed << setprecision(2);

if (!outfile)

{

cout << "Unable to open output file.\n";

return;

}

outfile << "+------------------------------+\n | Current Inventory |\n\

\n+------------------------------+\nNAME PRICE #\n\

\n-------------------- ------- ---\n";

for (int i = 0; i < size; i++)

{

outfile << products[i].name << " " << products[i].price << " " << products[i].inStock << endl;

}

outfile << "+------------------------------+\n";

outfile << "Number of products: " << size << endl;

outfile << "Inventory total value: " << totalValue(products, size) << endl;

cout << "Report written to file\n";

//close the output stream

outfile.close();

}

/*===============================================*/

void sort(prod products[], int size)

{

for (int i = 0; i < size; i++)

{

for (int j = i+1; j < size; j++)

{

if (products[i].name > products[j].name)

{

//swapping

prod temp = products[i];

products[i] = products[j];

products[j] = temp;

}

}

}

}

/*===============================================*/

double totalValue(prod products[], int size)

{

double total = 0;

for (int i = 0; i < size; i++)

{

total += products[i].inStock * products[i].price;

}

return total;

}

/*===============================================*/

void readInventory(prod products[], int& size)

{

// Open a file called “inventory.txt”

//and read the data from the file into the partial array

//.If the file fails to open,

//print “Unable to open input file”

//and set the number of products to 0.

size = 0;

ifstream inFile("inventory.txt");

if (!inFile)

{

cout << "Unable to open input file.\n";

return;

}

string name;

double price;

int qunatity;

while (inFile >> price >>qunatity >>name)

{

if (price != -1 && qunatity != -1 && name != "endofdata")

{

products[size].name = name;

products[size].inStock = qunatity;

products[size].price = price;

size++;

}

}

cout << "inventory read\n";

//close the stream

inFile.close();

}

/*===============================================*/

int main()

{

//declares a partial array of products

prod products[100];

int size;

// invokes readInventory()

readInventory(products, size);

// invokes sort()

sort(products, size);

// invokes writeReport()

writeReport(products, size);

// ends with the standard system pause.

system("pause");

return 0;

}

please see attachment for inventory text and output.