Question

C++ Programming

Consider an input file that lists test participants in alphabetical order and their scores. Each line has the following format:

LastName FirstName score

Load the input file into an array of structs, knowing there is a maximum of 50 participants. Output to output.txt the participants with the top 5 scores, in decreasing order of scores. Each output line should have the following format:

FirstName,LastName,score

Notes:

• The name of the input file is acquired through standard input.
• If the file does not exists, print the message "File not found!" in output.txt.
• The output file must be named output.txt.
• In case of a tie, output participants with the same score in alphabetical order.
• If there are less than 5 participants, output all of them in decreasing order of scores.

Example input file:

Baker Alex 90
Eaves Pat 100
Kay Ivy 100
Lamar Jay 80,
O'Conor Ashton 95
Saber Alice 98
Sabin Chris 89
Valdez Daniel 99
Valko Pete 92

Example output file:

Pat,Eaves,100
Ivy,Kay,100
Daniel,Valdez,99
Alice,Saber,98
Ashton,O'Conor,95

#include <iostream>
using namespace std;

struct participant
{
string fname;
string lname;
int score;
};

int main() {

/* Type your code here. */

return 0;
}

Answer 1

If you have any doubts, please give me comment...

#include <iostream>

#include <fstream>

#include <string>

using namespace std;

struct participant

{

    string fname;

    string lname;

    int score;

};

int main()

{

    string inp_fname;

    cout << "Enter input filename: ";

    cin >> inp_fname;

    ifstream in;

    in.open(inp_fname.c_str());

    ofstream out;

    out.open("output.txt");

    if (in.fail())

    {

        out << "File not found!" << endl;

        return -1;

    }

    participant participants[50];

    string fname, lname;

    int score, n = 0;

    while (!in.eof())

    {

        in >> lname >> fname >> score;

        participants[n].lname = lname;

        participants[n].fname = fname;

        participants[n].score = score;

        n++;

    }

    for (int i = 0; i < n; i++)

    {

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

        {

            if (participants[i].score < participants[j].score || (participants[i].score == participants[j].score && participants[i].fname < participants[j].fname))

            {

                participant temp = participants[i];

                participants[i] = participants[j];

                participants[j] = temp;

            }

        }

    }

    for(int i=0; i<5; i++){

        out<<participants[i].fname<<","<<participants[i].lname<<","<<participants[i].score<<endl;

    }

    in.close();

    out.close();

    return 0;

}