foodsurvey.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Exercise 14.11: FoodSurvey.cpp
// This program takes a survey of opinions on various foods.
#include <iostream> // required to perform C++ stream I/O
#include <iomanip>  // required for parameterized stream manipulators
#include <string>   // required to access string functions

using namespace std; // for accessing C++ standard library members

// function prototypes
void displayMenu( string [], int );

// function main begins program execution
int main()
{
   // define variables
   const int ARRAY_SIZE = 5; // stores number of food items
   int menuChoice = 0; // stores item to rate
   char input; // stores whether user likes/dislikes item

   // string array for food choices
   string foodChoices[ ARRAY_SIZE ] = { "", "Pizza", "Hot Dog",
      "Fish Sticks", "Mystery Meat" };

   // repeat until user enters 5 to exit
   while ( menuChoice != ARRAY_SIZE )
   {
      displayMenu( foodChoices, ARRAY_SIZE); // display the menu
      cin >> menuChoice; // store the user's selection

      // verify that the user entered a valid value
      if ( menuChoice < 1 || menuChoice > ARRAY_SIZE )
      {
         cout << "Error: Enter a value between 1 and 5." << endl;
      }

      // if the user selected a food item
      else if ( menuChoice < ARRAY_SIZE )
      {
         // stores whether user entered a valid food rating
         bool validResponse = false;

         // repeat until the user enters a valid rating
         while ( validResponse != true )
         {
            // prompt user for and input rating
            cout << "Do you like or dislike "
                 << foodChoices[ menuChoice ]
                 << " (enter l or d )? ";
            cin >> input; // store the rating

            // record input in the display array

         } // end inner while

      } // end else if

      // display the total ratings
      displayArray( display, foodChoices, ARRAY_SIZE );

   } // end outer while

   return 0; // indicates successful termination

} // end function main

// display a menu of options
void displayMenu( string options[], int size )
{
   int i; // counter variable in the for statement

   cout << "\nSelect food item: " << endl;

   // display each item
   for ( i = 1; i < size; i++ )
   {
   cout << i << " - " << options[ i ] << endl;
   } // end for

   cout << i << " - Exit this application" << endl;
   cout << "? ";

} // end function displayMenu

// display the total ratings
void displayArray( int display[][ 2 ], string foodChoices[],
                   int size )
{
      // output header
      cout << "\n" << setw( 13 ) << left << "Food"
           << setw( 5 ) << "Like" << "Dislike" << endl;

} // end function displayArray


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