Question

INPUT FILE INTO ARRAY. CHECKING FOR COMMAS AND SUCH. HOW TO DO?

void readFile(Candidate candidates[]) – reads the elections.txt file, fills the candidates[] array. Hint: use substr() and find() functions. Set Score to 0.

void List(Candidate candidates[]) – prints the array of Candidate structs. One candidate per one line, include all fields. Use setw() to display nice looking list.

void displayCandidate(Candidate candidates[]) – prints the complete information about the candidate

.
Candidate First(Candidate candidates[]) – returns single struct element: candidate with highest score

Candidate Last(Candidate candidates[]) – returns single struct element: candidate with lowest score

void Votes(Candidate candidates[]) – function sorts the candidates[] array by number of votes, the order in candidates[] array is replaced

void Scores(Candidate candidates[]) – calculates the percentage score for each candidate. Use the following formula: ??????=(CandidateVotes)/(sum of votes)*100%

Correct line for the reference: F=John,L=Smith,V=3342

The line errors that your program needs to detect, are as follows:

incorrect token / separator, example in line 5: F=Steven,L=JohnV=4429 --- (comma missing) – lines with this error need to be ignored

space in token, example in line 3: F=Hillary,X=Clinton, V=1622 --- lines with this error need to be read, error fixed, data included in your dataset

empty line, example in line 6 – empty lines need to be ignored

Example Textfile

F=Michael,L=John,V=3342

F=Danny,L=Red,V=2003

F=Hillary,L=Clinton, V=1588

F=Albert,L=Lee,V=5332

F=Steven,L=JohnV=4429

*IMPORTANT* How would I do the readFile function? It says to check if the commas are present, and that the program will correct the line if there is white spaces. How do i use the find() function? Please be DETAILED in explanations of each part of code. Beginner Coder. *IMPORTANT*

Code Skeleton We HAVE to follow. How Would i go about using this skeleton? YOU CANNOT CHANGE FUNCTIONS OF VARIABLES, BUT YOU MAY ADD TO IT. THE CODE MUST HAVE WHAT IS LISTED IN THE SKELETON CODE:

#include <iostream>

#include <iomanip>

#include <stdlib.h>

#include <fstream>

#include <string>

using namespace std;

struct Candidate {
string Fname;
string Lname;
int votes;
double Score;
};

const int MAX_SIZE = 100;

void readFile(Candidate[]);

void List(Candidate[]);

void Votes(Candidate[]);

void displayCandidate(Candidate);

Candidate First(Candidate[]);

Candidate Last(Candidate[]);

void Scores(Candidate[]);

int main() {

}

void readFile(Candidate candidates[]) {

string line;

ifstream infile;

infile.open("elections.txt");

while (!infile.eof()) {

getline(infile,line);

// your code here

}

infile.close();

}

void List(Candidate candidates[]) {

}

void Votes(Candidate candidates[]) {

}

void displayCandidate(Candidate candidates) {

}

Candidate First(Candidate candidates[]) {

}

Candidate Last(Candidate candidates[]) {

}

void Scores(Candidate candidates[]) {

}

Also, how do i make verticle columbs for the display?

Answer 1

// C++ program to read data of candidates from file and perform operations

#include <iostream>

#include <iomanip>

#include <stdlib.h>

#include <fstream>

#include <string>

using namespace std;

struct Candidate {

string Fname;

string Lname;

int votes;

double Score;

};

const int MAX_SIZE = 100;

int curr_size = 0;// variable to store the current number of candidates in the array

// function declaration

void readFile(Candidate[]);

void List(Candidate[]);

void Votes(Candidate[]);

void displayCandidate(Candidate);

Candidate First(Candidate[]);

Candidate Last(Candidate[]);

void Scores(Candidate[]);

int main() {

       Candidate candidates[MAX_SIZE];

       curr_size = 0;

       readFile(candidates);

       Scores(candidates);

       cout<<"Candidates : "<<endl;

       List(candidates);

       Votes(candidates);

       cout<<"\nCandidates sorted by votes in descending order : "<<endl;

       List(candidates);

       cout<<"\nCandidate with highest Score : "<<endl;

       displayCandidate(First(candidates));

       cout<<"\nCandidate with lowest Score : "<<endl;

       displayCandidate(Last(candidates));

       return 0;

}

void readFile(Candidate candidates[]) {

       string line;

       string fname, lname, votes;

       ifstream infile;

       size_t index;

       infile.open("elections.txt");

       if(infile.is_open())

       {

             // read till the end of file

             while (!infile.eof()) {

                    getline(infile,line);

                    if(!infile.eof()) // if its not the last line

                           line = line.substr(0,line.length()-1);

                    if(line.length() > 0)

                    {

                           index = line.find(','); //find the index of first comma

                           if(index != string::npos) // if not present ignore the record

                           {

                                 fname = line.substr(0,index); // get the firstname field

                                 if(fname.find(' ') != string::npos) // check for space

                                 {

                                        fname = fname.substr(0,fname.find(' ')) + fname.substr(fname.find(' ')+1); // extract the firstname

                                 }

                                 if(line.find(',',index+1) != string::npos) // find the index for next comma

                                 {

                                        lname = line.substr(index+1,line.find(',',index+1)-index-1); // get the last name field

                                        index = line.find(',',index+1);

                                        if(lname.find(' ') != string::npos) // check for space

                                        {

                                               lname = lname.substr(0,lname.find(' ')) + lname.substr(lname.find(' ')+1); // extract the lastname

                                        }

                                        votes = line.substr(index+1); // get the number of votes field

                                        if(votes.find(' ') != string::npos) // check for comma

                                               votes = votes.substr(0,votes.find(' ')) + votes.substr(votes.find(' ')+1); //extract the votes

                                        if(votes.length() > 0)

                                        {

                                               // get the fieldnames of the candidate

                                               candidates[curr_size].Fname = fname.substr(fname.find('=')+1);

                                               candidates[curr_size].Lname = lname.substr(lname.find('=')+1);

                                               candidates[curr_size].votes = stoi(votes.substr(votes.find('=')+1)); // stoi converts string to inetger (requires C++ 11)

                                               candidates[curr_size].Score = 0;

                                               curr_size++;

                                        }

                                 }

                           }

                    }

             }

             infile.close();

       }else

             cout<<"Unable to open file : elections.txt"<<endl;

}

// function to print all the candidates in a tabular format

void List(Candidate candidates[]) {

       cout<<left<<setw(15)<<"Firstname"<<left<<setw(15)<<"Lastname"<<left<<setw(10)<<"Votes"<<left<<"Score"<<endl;

       for(int i=0;i<curr_size;i++)

       {

             displayCandidate(candidates[i]);

       }

}

// function to sort the candidates array in descending order by votes

void Votes(Candidate candidates[]) {

       int max;

       for(int i=0;i<curr_size-1;i++)

       {

             max = i;

             for(int j=i+1;j<curr_size;j++)

                    if(candidates[j].votes > candidates[max].votes)

                           max = j;

             if(max != i)

             {

                    Candidate temp = candidates[i];

                    candidates[i] = candidates[max];

                    candidates[max] = temp;

             }

       }

}

// function to display the details of a candidate

void displayCandidate(Candidate candidates) {

       cout<<left<<setw(15)<<candidates.Fname<<left<<setw(15)<<candidates.Lname<<left<<setw(10)<<candidates.votes<<left<<fixed<<setprecision(2)<<candidates.Score<<endl;

}

// function to return the candidate with highest score

Candidate First(Candidate candidates[]) {

       int max = 0;

       for(int i=1;i<curr_size;i++)

       {

             if(candidates[i].Score > candidates[max].Score)

                    max = i;

       }

       return candidates[max];

}

// function to return candidate with lowest score

Candidate Last(Candidate candidates[]) {

       int min = 0;

       for(int i=1;i<curr_size;i++)

       {

             if(candidates[i].Score < candidates[min].Score)

                           min = i;

       }

       return candidates[min];

}

// function to calculate the scores of the candidate

void Scores(Candidate candidates[]) {

       double total = 0;

       for(int i=0;i<curr_size;i++)

       {

             total += candidates[i].votes;

       }

       if(total > 0)

       {      for(int i=0;i<curr_size;i++)

             {

                           candidates[i].Score = ((double)(candidates[i].votes*100))/total;

             }

       }

}

//end of program

Output:

Input file:

Output: