HASH TABLE Exception thrown: read access violation.

[NoobCplusplusGuy]

Hello Cplusplus people, I have currently have a problem with my program where I am trying to create a hash table that has a structure of name, last name and ID number where the ID can be find by the user input but when I run my program only the name of the first list pop up and it shows

"Exception thrown: read access violation.
**std::_String_alloc<std::_String_base_types<char,std::allocator<char> > >::_Mysize**(...) returned 0xCCCCCCE0. occurred"

with xstring file popping up anything helps

hash.h

#include <iostream>
#include <string>
using namespace std;
#define HASH_H
#include <cstdlib>
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
struct Student
{
	string ID;
	string name;
	Student* next;
};

class hasht {
public:
	hasht();
	int Hash(string key);
	void insert(string ID, string name);
	string retrieve(string id);
	int NumItemsIndex(int index);
	void PrintTable();
private:
	static const int tableSize = 100;
	Student* HashTable[tableSize];
};

hash.cpp

#include "hash.h"
hasht::hasht()
{
	for (int i = 0; i < tableSize; i++)
	{
		HashTable[i] = new Student;
		HashTable[i]->name = "empty";
		HashTable[i]->name = "empty";
		HashTable[i]->next = NULL;
	}
}
void hasht::insert(string ID, string name)
{
	int index = Hash(ID);
	if (HashTable[index]->ID == "empty")
	{
		HashTable[index]->ID = ID;
		HashTable[index]->name = name;
	}
	else
	{
		for (int i = 1;; i++)
		{
			if (HashTable[index + i]->ID == "empty")
			{
				HashTable[index + i]->ID = ID;
				HashTable[index + i]->name = name;
				break;
			}
		}
	}//else

}
string hasht::retrieve(string id)
{
	int index = Hash(id);
	string sname = "";
	if (HashTable[index]->ID == id)
	{
		sname = HashTable[index]->name;
	}
	else
	{
		for (int i = 1; i <100 - (index + i); i++)
		{
			if (HashTable[index + i]->ID == id)
			{
				sname = HashTable[index + i]->name;
				break;
			}
		}
	}
	return sname;
}

int hasht::NumItemsIndex(int index)
{
	int count = 0;
	if (HashTable[index]->ID == "empty")
	{
		return count;
	}
	else
	{
		count++;
		Student* Ptr = HashTable[index];
		while (Ptr->next != NULL)
		{
			count++;
			Ptr = Ptr->next;
		}
	}
	return count;
}

void hasht::PrintTable()
{
	int number;
	for (int i = 0; i < tableSize; i++)
	{
		number = NumItemsIndex(i);
		cout << "-----------------------\n";
		cout << "index = " << i << endl;
		cout << HashTable[i]->ID << endl;
		cout << HashTable[i]->name << endl;
		cout << "# of items = " << number << endl;
		cout << "-----------------------\n";
	}
}
int hasht::Hash(string key)
{
	string value = key.substr(2, 2);
	int index = stoi(value);
	return index;
}

main.cpp

#include <iostream>
#include <string>
using namespace std;
#include "hash.h"
bool die(const string &msg);
void show(string a[25][2]);
int main()
{
	hasht hasha;
	string id;
	string NAME;
	string line;
	string a[25][2];
	int b = 0;
	ifstream myfile("id.txt");
	if (myfile.is_open())
	{
		while (getline(myfile, line))
		{
			id = line.substr(0, 4);
			NAME = line.substr(5);
			cout << id << endl << NAME << endl << endl;
			//cout << id << endl << NAME << endl << endl;
			a[b][0] = id;
			a[b][1] = NAME;
			b++;
			hasha.insert(id, NAME);
			//hasha.insert(id, NAME);
		}
		myfile.close();
	}
	else cout << "Unable to open file";
	show(a);
	system("pause");
	//show(a);

	//system("pause");

	string cont;

	string cant;

	for (int i = 0; i < 25; ++i)

	{

		cont = a[i][0];

		cant = a[i][1];

		cout << cont << endl << cant << endl << endl;

		hasha.insert(a[i][0], a[i][1]);

	}
	hasha.PrintTable();
	//hasha.PrintTable();
	int num;
	string sid, sname;
	cout << "1. Find student by ID." << endl << "2. Exit." << endl;
	cin >> num;
	if (num == 1)
	{
		cout << "Enter student ID: ";
		cin >> sid;
		sname = hasha.retrieve(sid);
		if (sname == "")
			cout << "There is no student with that ID." << endl;
		else
			cout << sname << endl;
	}
	else if (num == 2)
	{
		exit(1);
	}
	else
	{
		die("Invalid Input");
	}
	return 0;
	system("pause");
}

bool die(const string &msg)

{

	cout << "Fatal error : " << msg << endl;

	exit(EXIT_FAILURE);

}

void show(string a[25][2])
{
	for (int i = 0; i < 25; ++i)
	{
		for (int j = 0; j < 2; ++j)
		{
			cout << a[i][j] << endl;
		}
		cout << endl;
	}
}

[NoobCplusplusGuy]

As for the txt.file you can create anything like

1234 hello world
1534 herro weird
2244 please help
1144 thank you