Reference no: EM132318254

The main function is elect_candidate which has most of the brain of this program. Towards to bottom of it when i run it gives me errors for the lines where i compare ballots with -1 and set the values to 0

#include <fstream>
#include <cstdlib>
#include <iomanip>
using namespace std;

const char *FILENAME = "elections.txt";
const int MAXBALLOTS = 500;
const int NUM_CANDIDATES = 3;

int elect_candidate(int ballots[MAXBALLOTS][NUM_CANDIDATES],
                    int numBallots) {

    int winner = -1;
    int round=0;
    int tally[NUM_CANDIDATES + 1] = { 0 };
    double percentages[NUM_CANDIDATES + 1];


    int neg = -1;
    while(winner==-1){//repeats this process until a winner is found
        cout<<"Round "<<round<<": "<<endl;
        for(int i = 0;i<numBallots;i++){
            int choice;
            for(int rank=0;rank<3;rank++){
                choice=ballots[i][rank];
                if(tally[choice]==-1){
                    tally[choice]+=2;
                }
                else
                {
                    tally[choice]++;
                    break;
                }
            
            }
            round++;
        }
   
    cout << "Percentages for each candidate: " << endl;
        for (int i = 1; i < NUM_CANDIDATES + 1; i++) {
            percentages[i] = (double)tally[i] / numBallots;
            cout << fixed << setprecision(2);
            cout << "#" << i << ": " << percentages[i];
            cout << endl;
        }


    
    for(int i=1;i<NUM_CANDIDATES+1 ;i++){
        if(percentages[i]>0.5)
            winner==i;
    }
   


    if(winner==-1){
        int lowestPercent=percentages[1];
        int lowestCandidate=1;
        for(int i=1;i<NUM_CANDIDATES+1 ;i++){
            if(percentages[i]<lowestPercent){
                lowestPercent=percentages[i];
                lowestCandidate=i;
            }
        }
        ballots[lowestCandidate]== -1;
        for(int i=1;i<NUM_CANDIDATES+1 ;i++){
            if(ballots[i]!==-1)
                ballots[i]==0;
        }
    }
}


        return -1;
        
}



int main()
{
    ifstream f(FILENAME);
    string tmp;
    int nLines;
    int numBallots = 0;


    int ballots[MAXBALLOTS][NUM_CANDIDATES];


    // While we are not at end-of-file
    while (getline(f, tmp)) {
        // Read the number of lines for this election
        nLines = atoi(tmp.c_str());
        // Read in each ballot
        for (int i = 0; i < nLines; i += 3) {
            // Read in a single ballot (3 lines each)
            cout << "Read ballot: ";
            for (int j = 0; j < NUM_CANDIDATES; j++) {
                getline(f, tmp);
                ballots[numBallots][j] = atoi(tmp.c_str());
                cout << " " << ballots[numBallots][j];
            }
            numBallots++;
            cout << endl;
        }
        cout << "Read " << numBallots << " ballots." << endl;


        int winner = -1;
        int round = 0;


        // Run the election
        winner = elect_candidate(ballots,
                                 numBallots);


        cout << "The winner is: " << winner << endl;


        // TEMPORARY -- Turn this on if you want to
        // just load 1 set of ballots.
        // return 0;


        // Reset ballot counter for next round
        // -- continue loading more elections.
        numBallots = 0;
    }
    system("pause");
    return 0;
}