shoppinglist.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Tutorial 16: ShoppingList.cpp
// Enables users to add items to, remove items from and view items in
// a shopping list.
#include <iostream> // required to perform C++-style stream I/O
#include <iomanip>  // required for parameterized stream manipulators
  
using namespace std; // for accessing C++ Standard Library members

#include "ShoppingItem.h" // ShoppingItem class definition
#include "List.h" // List class definition

int displayMenu(); // function prototype

// function main begins program execution
int main()
{
   int selection = 0; // stores the user's menu selection
   string itemName; // stores the item name
   int itemQuantity; // stores the item quantity
   List shoppingList; // stores a list of shopping items

   while ( selection != 3 )
   {
      selection = displayMenu();

      switch ( selection )
      {
         // enter item information
         case 1: 
            cin.ignore(); // remove newline from cin

            // prompt user for and input item name and quantity
            cout << "\nEnter item name: ";
            getline( cin, itemName ); // get name

            cout << "Enter quantity: ";
            cin >> itemQuantity; // get quantity

            // add new ShoppingItem to the list
            shoppingList.addItem( itemName, itemQuantity );

            break;

         // view all items in the list
         case 2: 
            shoppingList.displayList(); // display each item
            
            break;

         // exit
         case 3: 
            shoppingList.deleteList(); // delete each object
            cout << "\n"; // display newline for readability
            break;

         default: 
            cout << "\nError: Enter a valid menu selection";
      
      } // end switch

   } // end while

   return 0; // indicate that program ended successfully

} // end function main

// displays a menu and returns the selected menu option number
int displayMenu()
{
   int selection = 0; // stores the menu option number

   // display the menu
   cout << "\nSelect one of the following options" << endl;
   cout << "1 - Enter new item" << endl;
   cout << "2 - Display list" << endl;
   cout << "3 - Exit the application" << endl;
   cout << "Enter selection: ";
   cin >> selection;

   return selection; // return the selection

} // end function displayMenu

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