Программа работает до определенного момента, потом вылетает, появляется ошибка чтения символов строки - C (СИ)

#pragma once
#include <iostream>
using namespace std;
class drug
{
protected:
    string name;
    int price;
public:
    drug() {};
    drug(string cur_name, int cur_price);
    virtual void show();
 
    ~drug();
};

#include "drug.h"
#include <iostream>
#include <string.h>
#include <string>
using namespace std;
drug::drug(string cur_name, int cur_price)
{
 
    this->name = cur_name;
    this->price = cur_price;
}
void drug::show()
{
    cout << "\n Medical drug:" << endl;
    cout << "Name: " << name << endl;
    cout << "Price: " << price << endl;
}
 
drug::~drug()
{
}

#pragma once
#include "drug.h"
class mixture :public drug
{
protected:
    int size;
public:
    mixture() {};
    mixture(int cur_size, string name, int price) :drug(name, price)
    {
        this->size = cur_size;
    }
    void show();
    ~mixture() {};
 
};

#include "mixture.h"
#include "drug.h"
#include <string>
void mixture::show()
{
    cout << "\nMedical drug: " << endl;
    cout << "Name: " << name << endl;
    cout << "Size(ml): " << size << endl;
    cout << "Price: " << price << endl;
}

#pragma once
#include "drug.h"
 
class tablets :public drug
{
protected:
    int number;
public:
    tablets() {};
    tablets(int cur_number, string name, int price) :drug(name, price)
    {
        this->number = cur_number;
    };
    void show();
    ~tablets();
 
};

#include "tablets.h"
#include "drug.h"
#include <string>
#include <iostream>
using namespace std;
 
tablets::~tablets()
{};
 
void tablets::show()
{
    cout << "\nMedical drug:" << endl;
    cout << "Name: " << name << endl;
    cout << "Number: " << number << endl;
    cout << "Price: " << price << endl;
}

#include <iostream> 
#include <conio.h> 
#include <math.h>
 
using namespace std;
 
void main()
{
    setlocale(LC_ALL, "rus");
    double x[3], y[3],X[3];
    double L = 1,L_1=0;
 
    cout<<"Введите значение х(i):"<<endl;
    for (int i = 0; i < 4; i++)
    {
        cout << "x" <<i<< ":";
        cin >> x[i];
    }
    cout<<"Введите значение y(i):"<<endl;
    for (int i = 0; i < 4; i++)
    {
        cout << "y" << i << ":";
        cin >> y[i];
    }
    cout<<"\nВведите значение точек:"<<endl;
    for (int i = 0; i < 4; i++)
    {
        cout << "X" << i << ":";
        cin >> X[i];
    }
    for (int k = 0; k < 4; k++)
    {
        L_1 = 0;
        for (int i = 0; i <4; i++)
        {
            L = 1;
            for (int j = 0; j <4; j++)
                if (i != j)
                    L = L*((X[k]- x[j]) / (x[i] - x[j]));
 
            L_1 = L_1 + L*y[i];
        }
        cout<<"Y["<<X[k]<<"]="<<L_1<<" "<<endl;
    }
    system("pause");
    _getch;
}

#include "drug.h"
#include "mixture.h"
#include "tablets.h"
#include <iostream>
#include <conio.h>
#include <string>
using namespace std;
 
void input(string *name, int *price)
{
    cout << "Name: ";
    cin >> *name;
    cout << "Price: ";
    cin >> *price;
}
 
void objects(drug *obj[], int n)
{
    string name;
    int price, number, size, a;
    for (int i = 0; i < n; i++)
    {
        cout << "Do you want input data of tablets-1, or mixture-2: ";
        cin >> a;
        switch (a)
        {
        case 1:
        {
            input(&name, &price);
            cout << "Number: ";
            cin >> number;
            obj[i] = new tablets(number, name, price);
            break;
        }
        case 2:
        {
            input(&name, &price);
            cout << "Size: ";
            cin >> size;
            obj[i] = new mixture(size, name, price);
            break;
        }
        }
    }
    for (int i = 0; i < n; i++)
        delete obj[i];
}
 
void main(int argc, const char * argv[])
{
    const int n = 2;
    drug *obj[n];
    objects(obj, n);
    for (int i = 0; i < n; i++)
        obj[i]->show();
    _getch();
}