?? shop.cpp
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// Fig. 19.22: shop.cpp
// Program to display available books.
#include <iostream>
using std::cerr;
using std::cout;
using std::ios;
#include <fstream>
using std::ifstream;
#include <string>
using std::string;
#include <cstdlib>
using std::exit;
void header();
int main()
{
// variables to store product information
char book[ 50 ] = "";
char year[ 50 ] = "";
char isbn[ 50 ] = "";
char price[ 50 ] = "";
string bookString = "";
string yearString = "";
string isbnString = "";
string priceString = "";
ifstream userData( "catalog.txt", ios::in ); // open file for input
// file could not be opened
if ( !userData )
{
cerr << "Could not open database.";
exit( 1 );
} // end if
header(); // output header
// output available books
cout << "<center><br/>Books available for sale<br/><br/>"
<< "<table border = \"1\" cellpadding = \"7\" >";
// file is open
while ( userData )
{
// retrieve data from file
userData.getline( book, 50 );
bookString = book;
userData.getline( year, 50 );
yearString = year;
userData.getline( isbn, 50 );
isbnString = isbn;
userData.getline( price, 50 );
priceString = price;
cout << "<tr><td>" << bookString << "</td><td>" << yearString
<< "</td><td>" << isbnString << "</td><td>" << priceString
<< "</td>";
// file is still open after reads
if ( userData )
{
// output form with buy button
cout << "<td><form method=\"post\" "
<< "action=\"/cgi-bin/viewcart.cgi\">"
<< "<input type=\"hidden\" name=\"add\" value=\"true\"/>"
<< "<input type=\"hidden\" name=\"isbn\" value=\""
<< isbnString << "\"/>" << "<input type=\"submit\" "
<< "value=\"Add to Cart\"/>\n</form></td>\n";
} // end if
cout << "</tr>\n";
} // end while
cout << "</table></center><br/>"
<< "<a href=\"/cgi-bin/checkout.cgi\">Check Out</a>"
<< "</body></html>";
return 0;
} // end main
// function to output header information
void header()
{
cout << "Content-Type: text/html\n\n"; // output header
// output XML declaration and DOCTYPE
cout << "<?xml version = \"1.0\"?>"
<< "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" "
<< "\"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">";
// output html element and some of its contents
cout << "<html xmlns = \"http://www.w3.org/1999/xhtml\">"
<< "<head><title>Shop Page</title></head><body>";
} // end function header
/**************************************************************************
* (C) Copyright 1992-2005 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
**************************************************************************/
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