Pointers/References in C++ Project - c++

Question

I've been learning C++ for only a couple of months. We had a project that was due about pointers/reference. This is my code below that I submitted. However, My teacher said I didn't include pointers/references in my code. I was certain that I did on line 31-42. I'm having trouble understanding pointers. Please give feedback on what I should do differently.
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;
int main()
{
//Opening File
ifstream cafefile;
cafefile.open("cafeteria.txt");
//Check for errors
if (!cafefile)
{
cout << "cafeteria.txt did not open properly" << endl;
exit(9999);
}
//String & char
string choice;
string array[4][3];
char out;
//Pointers to the food
string food[] { "Cheese Pizza", "Hamburger", "Fish Sticks", "Mystery Meat" };
string *foodptr {food};
//Set yes & no to 4 array
int yes[4]{ 0 };
int no[4]{ 0 };
//pointer for integer Yes / NO
int* yesptr{ yes };
int* noptr{ no };
//Counters of Likes & Dislikes set = 0
int like = {0};
int dislike = {0};
for (int i = 0; i < 4; i++)
{
//Reopen the file
ifstream file("cafeteria.txt");
while (getline(file, choice))
{
istringstream pick(choice); //istringstream is input stream class, which operates on string
getline(pick, choice, '\t');
if (foodptr[i] == choice)
{
pick >> choice;
if (choice == "Y")
like++; //increment
else if (choice == "N")
dislike++; //increment
}
}
//Setting the yes = like
yesptr[i] = like;
noptr[i] = dislike;
//Set to 0
like = 0;
dislike = 0;
}
for (int m = 0; m < 4; m++)
{
array[m][0] = foodptr[m];
}
for (int j = 0; j < 4; j++)
{
array[j][1] = to_string(yesptr[j]);
}
for (int i = 0; i < 4; i++)
{
array[i][2] = to_string(noptr[i]);
}
//Display of the Program
cout << "School Cafeteria Survey!" << endl;
cout << endl;
cout << "Food Item" << "\t" << "Like" << "\t" << "Dislike" << endl; //Gives the tab space Horizontally in your output
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 3; j++)
{
cout << array[i][j] << "\t";
}
cout << endl;
}
//Background color, making it unique
system("color 6");
//Exit the Prgram
cout << endl;
cout << "Please enter 'E' to exit!";
cin >> out;
if (out == 'e' || out == 'E')
{
exit(0);
}
system("pause"); //pause the program
return 0;
}
Please provide solutions on what I should fix.

Answer 1

It would be better if you create your arrays dynamically i.e. make the 2D array dynamically using pointers
string **array;
array = new int *[4];
for(int i=0; i<4; i++){
array[i] = new int[3];
}
Other than this, your teacher must have wanted your to access these array not using indexing, but rather by using pointers and references. This means that you shouldn't access arrays using yesptr[i] but rather by using *(yesptr + i).
So for e.g. if you are in a loop do the following
for (int m = 0; m < 4; m++)
{
*(*(array+m)+0) = *(foodptr+m);
}