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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Question

Please modify the C++ data structure program below to detect and display multiple candidates with the same number of votes: multiple winners, multiple candidates with the second highest number of votes, multiple candidates with the third highest number of votes, and so on.

Suppose the candidates are A, B, C, D, E, F and G and their votes are:

A 100

B 200

C 200

D 400

E 100

F 400

G 300

H 300

Then your program should display,

A Fourth Place 

B Third Place

C Third Place

D First Place

E Fourth Place 

F First Place

G Second Place

H Second Place

with the amount of votes they received, for example: A Fourth Place with 100 votes, B Third Place with 200 votes, C Third Place with 200 and etc.  Text file names and program below. Thank you.

votes.txt
Johnson
Miller
Robinson
Duffy
Asthon
Sampson
Adams
Williams

________________________________________________________________________________

#include <array>

#include <cassert>

#include <cmath>

#include <fstream>

#include <iomanip>

#include <iostream>

#include <string>

#include <vector>

using namespace std;

 

const string filename = "votes.txt";

const int maxCandidates = 8;

struct Candidate

{

    string name = "";

    size_t votes = 0;

    double percent = 0.0;

};

int main()

{

    ifstream inps(filename);

    assert(inps);

    array<Candidate, maxCandidates> candidates;

    size_t nCandidates = 0;

    while (inps.good() && nCandidates < maxCandidates)

    {

        string name;

        inps >> name;

        size_t votes;

        inps >> votes;

        candidates[nCandidates].name = name;

        candidates[nCandidates].votes = votes;

        nCandidates++;

    }

    if (nCandidates > 0)

    {

        size_t namefieldwidth = 12;

        size_t maxvotes = 0;

        size_t maxidx = 0;

        size_t totalvotes = 0;

        for (size_t idx = 0; idx < nCandidates; idx++)

        {

            totalvotes += candidates[idx].votes;

            if (candidates[idx].votes > maxvotes)

            {

                maxvotes = candidates[idx].votes;

                maxidx = idx;

            }

        }

        size_t namefieldwith = 16;

        size_t votesfieldwidth = 16;

        size_t percentfieldwidth = 16;

        if (totalvotes > 0)

        {

            for (size_t idx = 0; idx < nCandidates; idx++)

                candidates[idx].percent = 100.0 * candidates[idx].votes / static_cast<double>(totalvotes);

        }

        cout << fixed << setprecision(2);

        cout << left << setw(namefieldwidth) << "Candidate" << ' ' << right << setw(votesfieldwidth) << "Votes Received" << ' ' << right << setw(percentfieldwidth) << setfill(' ') << "% of Total Votes " << endl << endl;

        for (size_t idx = 0; idx < nCandidates; ++idx)

            cout << left << setw(namefieldwidth) << candidates[idx].name << ' ' << right << setw(votesfieldwidth) << candidates[idx].votes << ' ' << right << setw(percentfieldwidth) << setfill(' ') << candidates[idx].percent << endl;

        size_t totalvotesfieldwidth = namefieldwidth + votesfieldwidth + 1;

        cout << setw(totalvotesfieldwidth) << totalvotes << endl << endl;

 

        cout << "The winner of the Election is " << candidates[maxidx].name << endl;

    }

    return 0;

}

 

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