Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Using a Bubble Sort in C++

Summary

In this lab, you complete a C++ program that uses an array to store data for the village of Marengo.

The program is described in Chapter 8, Exercise 5, in Programming Logic and Design. The program should allow the user to enter each household size and determine the mean and median household size in Marengo. The program should output the mean and median household size in Marengo. The file provided for this lab contains the necessary variable declarations and input statements. You need to write the code that sorts the household sizes in ascending order using a bubble sort and then prints the mean and median household size in Marengo. Comments in the code tell you where to write your statements.

Instructions

  1. Make sure that the file HouseholdSize.cpp is selected and open.
  2. Write the bubble sort.
  3. Output the mean and median household size in Marengo.
  4. Execute the program by clicking the Run button and the bottom of the screen.
  5. Enter the following input, and ensure the output is correct. Household sizes: 4, 1, 2, 4, 3, 3, 2, 2, 2, 4, 5, 6 followed by 999 to exit the program.

Use the given Code

// HouseholdSize.cpp - This program uses a bubble sort to arrange up to 300 household sizes in
// descending order and then prints the mean and median household size. 
// Input:  Interactive.
// Output:  Mean and median household size. 

#include <iostream>
#include <string>
using namespace std;

int main() 
{
   // Declare variables.
    
   const int SIZE = 300;  // Number of household sizes
   int householdSizes[SIZE];    // Array used to store 300 household sizes
   int x; 
   int limit = SIZE;
   int householdSize = 0;
   int pairsToCompare;
   bool switchOccurred; 
   int temp;
   double sum = 0;
   double mean = 0;
   double median = 0;

   // Input household size    
   cout << "Enter household size or 999 to quit: ";
   cin >> householdSize;
   
   // This is the work done in the fillArray() function
   x = 0;
   while(x < limit && householdSize != 999)   
   {
      // Place value in array.
      householdSizes[x] = householdSize;
      // Calculate total of household sizes
      
      x++;    // Get ready for next input item.
      cout << "Enter household size or 999 to quit: ";
      cin >> householdSize;
   }  // End of input loop.
    
   
   // Find the mean
   
   // This is the work done in the sortArray() function

   // This is the work done in the displayArray() function

   // Print the mean

   // Find the median
   
   // Print the median
        
   return 0;
} // End of main function
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