screenscraping.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Tutorial 19: ScreenScraping.cpp
// Search an HTML code string for an item and display its price
// converted from euros to American dollars.
#include <iostream> // required to perform C++ stream I/O
#include <iomanip>  // required for parameterized stream manipulators
#include <string>   // required to access string functions
#include <cstdlib>  // required for the atof function

using namespace std; // for accessing C++ Standard Library members

// function prototypes
void displayMenu( string & );
double getRate();
double getPrice( string &, string &, double );

// function main begins program execution
int main ()
{

   return 0; // indicate that program ended successfully

} // end function main

// prompt the user for a search item and return the appropriate
// search string
void displayMenu( string &searchText )
{
   // define local variable to store user selection from the menu
   int selection = 0;

   while ( selection < 1 || selection > 4 )
   {
      // display the menu
      cout << "\nWhich item would you like to search for?\n";
      cout << "1 - Antique Rocking Chair" << endl;
      cout << "2 - Silver Teapot" << endl;
      cout << "3 - Gold Pocket Watch" << endl;
      cout << "4 - Exit the application" << endl;
      cout << "Enter selection: ";
      cin >> selection; // retrieve the selection

      // assign the appropriate search string to searchText
      switch ( selection )
      {
         case 1:
            searchText = "Antique Rocking Chair";
            break;

         case 2:
            searchText = "Silver Teapot";
            break;

         case 3:
            searchText = "Gold Pocket Watch";
            break;

         case 4:
            searchText = "";
            cout << endl;
            break;

         default: // if invalid option was selected
            searchText = "";
            cout << "Error: Please enter a valid selection."
                 << endl;
      } // end switch

   } // end while

} // end function displayMenu

// get currency conversion rate
double getRate()
{
   double rate; // stores the conversion rate

   // prompt the user for and input the conversion rate
   cout << "Enter conversion rate: ";
   cin >> rate; // get the rate

   return rate; // return a copy of the rate

} // end function getRate

// find the price for the selected item
double getPrice( string &htmlText, string &searchText,
   double conversionRate )
{

} // end function getPrice


/**************************************************************************
 * (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.                     *
 **************************************************************************/