Question

need help on C++
Discussion: The program should utilize 3 files.
player.txt – Player name data file – It has: player ID, player first name, middle initial, last name
soccer.txt – Player information file – It has: player ID, goals scored, number of penalties, jersey
number
output file - formatted according to the example provided later in this assignment
a) Define a struct to hold the information for a person storing first name, middle initial, and
  last name).
b) Define a struct to store the data for a Soccer player storing the player’s name (use the
struct created earlier), position (Forward, etc.), number of goals scored, number of
penalties committed, his/her Jersey number, and status.
c) Declare an array of 30 (use a named constant) components/structs, one for each player.

Include the following capabilities:

1) A bool function to check if a given file (its parameter) exists or not. The function will
have the file name as parameters. The function should return false, if the file cannot be
found. You can use the returned value to terminate the program, if a valid file name has
not been entered by the user. You can call this function twice, once to check for the
player name file and once to check for the player information file.

  2) A void function to read the data into the array from the data files (player name and
       player information data files). The function should accept as parameters the input data
    file names and the array of struct. The file names are supplied through the command line
    arguments.

    3) A void function to identify the status of a player: 0-1 goals scored is Poor, 2-4 goals
    scored is Good, and more than 4 goals scored is Excellent. The identification is
   INVALID for any other situation. This value will be stored in the status field of the
struct.

4) A void function to write the data to a file whose named is entered through the command
line argument. The function accepts the file name and the data array as its parameter.
Display the data using a tabular format placing a space after each data item. See the
   sample output a bit later.

The main function should only be a collection of function calls in addition to the required
declaration of variables. You will also process the command line arguments in the main function.

Input data file example (player.txt):
Item 1: ID
Item 2: First name
Item 3: Middle initial
Item 4: last name

Input data file example (soccer.txt):
Item 1: ID
Item 2: position
Item 3: Number of goals scored
Item 4: Number of penalties
Item 5: Jersey number

Here is an example of the input data file (player.txt):
1 Larry L Page
2 Sergey B Brin
3 Marissa A Mayer

Here is an example of the input data file (soccer.txt):
1 forward 8 2 21
2 defense 12 0 82
3 goalkeeper -1 0 5

Here are some sample runs:
./a.out
Error: program needs arguments – Example: ./a.out player.txt soccer.txt output.txt

./a.out player.txt soccer.txt output.txt
Here is a sample output file – output.txt
Larry L Page 8 2 21 forward Excellent
Sergey B Brin 12 0 82 defense Excellent
Marissa A Mayer -1 0 5 goalkeeper INVALID

Of course, above is just a sample example. Anyone with 2 – 4 goals will be considered Good,
etc. make sure to fully test the code with various data values.

./a.out playerzz.txt soccer.txt output.txt
Missing input data file: playerzz.txt - terminating program

./a.out player.txt socceroo.txt output.txt
Missing input data file: socceroo.txt - terminating program

Answer 1

Here is the program

#include <iostream>
#include <fstream>
#include <string.h>
#include <stdio.h>
using namespace std;

// define player structure
struct player
{
   int id;
   string first_name;
   char middle_initial;
   string last_name;
};

//define soccer structure
struct soccer
{
   int id;
   player name;
   string position;
   int goal;
   int penalty;
   int jersey;
   string status;
};

const int TOTAL = 30;
int size = 0;
soccer player_data[TOTAL];

//check if the file exists
bool is_exist(string fileName)
{
ifstream infile(fileName);
return infile.good();
}

// set the status of player
void set_status(soccer *s)
{
s->status = "INVALID";
if(s->goal==0 || s->goal==1) s->status = "Poor";
if(s->goal==2 || s->goal==2 || s->goal == 3) s->status = "Good";
if(s->goal >= 4) s->status = "Excellent";
}

// read input files and store the data in struct array
void read_data(string playerFile, string dataFile, soccer data[] )
{
ifstream pfile(playerFile);
ifstream sfile(dataFile);
int i = 0;
char * pch;
int n = 0;
int j = 0;
if (pfile.is_open()) {
string pline;
while (getline(pfile, pline)) {
player pname;
n = pline.length();
char char_array[n + 1];
// copying the contents of the string to char array
strcpy(char_array, pline.c_str());
pch = strtok (char_array," ");
while (pch != NULL)
{
if(j == 0){
//cout << "id is " << pch;
pname.id = stoi(pch);
} else if(j == 1) {
//cout << "first name is " << pch;
pname.first_name = pch;
} else if(j == 2) {
//cout << "middle name is " << pch;
pname.middle_initial = pch[0];
} else if(j == 3) {
//cout << "last name is " << pch;
pname.last_name = pch;
}
pch = strtok (NULL, " ");
j++;
//cout << endl;
}
data[i].id = pname.id;
data[i].name = pname;
j=0;
i++;
}
pfile.close();
  
}
i=0;
if (sfile.is_open()) {
string sline;
while (getline(sfile, sline)) {
n = sline.length();
char char_array[n + 1];
// copying the contents of the string to char array
strcpy(char_array, sline.c_str());
pch = strtok (char_array," ");
j=0;
while (pch != NULL)
{
if(j == 0) {
//cout << "id is " << pch;
} else if(j == 1) {
//cout << "position is " << pch;
data[i].position = pch;
} else if(j == 2) {
//cout << "goal is " << pch;
data[i].goal = stoi(pch);
} else if(j == 3) {
//cout << "penalty is " << pch;
data[i].penalty = stoi(pch);
} else if(j == 4) {
//cout << "jersey is " << pch;
data[i].jersey = stoi(pch);
}
//printf ("%s\n",pch);
pch = strtok (NULL, " ");
j++;
}
j=0;
set_status( &data[i]);
//cout << "status is " << data[i].status;
//cout << endl;
i++;
}
sfile.close();
}
size =i;
}

// write data to output file
void write_data(string output_file, soccer data[])
{
ofstream outfile(output_file);
string output;
/* Same output as below
Larry L Page 8 2 21 forward Excellent
Sergey B Brin 12 0 82 defense Excellent
Marissa A Mayer -1 0 5 goalkeeper INVALID
*/
for (int i = 0; i < size; i++)
{
/*
cout << data[i].name.first_name;
cout << data[i].name.middle_initial;
cout << data[i].name.last_name;
cout << data[i].goal;
cout << data[i].penalty;
cout << data[i].jersey;
cout << data[i].position;
cout << data[i].status;
*/
outfile << data[i].name.first_name << " " << data[i].name.middle_initial
<< " " << data[i].name.last_name << " " << data[i].goal << " "<< data[i].penalty
<< " " << data[i].jersey << " " << data[i].position << " " << data[i].status << endl;
}
outfile.close();
}

// The main function
int main (int argc, char** argv)
{
if(argc != 4) {
cout << "wrong format. Enter in format ./a.out player.txt soccer.txt output.txt";
exit(1);
}
string player_file = argv[1];
if(!is_exist(player_file)) {
cout << "Missing input data file:" << player_file << " - terminating program";
exit(1);
}
  
string soccer_file = argv[2];
if(!is_exist(soccer_file)) {
cout << "Missing input data file:" << soccer_file << " - terminating program";
exit(1);
}
  
string output_file = argv[3];
read_data(player_file, soccer_file, player_data );
write_data(output_file, player_data);
return 0;
}