c++动态数组结构体分割错误

我正在编写一个程序，该程序从名为"phonebook.txt"的文本文件中读取数据并将其显示在终端中。它询问用户想要添加多少联系人。用户将输入他/她想要的联系人数量，程序将输出这个和旧联系人一起从"phonebook.txt"到"updated-phonebook.txt"。现在我选择使用动态数组而不是矢量，因为我想感受一下如何处理内存分配。

#include <iostream>
#include <string>
#include <fstream> 
#define nullptr 0;

struct Person
{
  std::string lName, fName, streetAddr, city, state, zip, phoneNum;
};
int main ()
{
  std::ofstream outFile;
  std::string dummy;
  int amount, total, count = 0;
  Person *contact;
  //set the pointer to 0 so its not pointing
  //to anything else in memory 
  contact = nullptr;
  std::ifstream inFile("/home/isemanthaj/My_Programs/Class_Programs/Assignment_3/phonebook/phonebook.txt",std::ios::in);
  if (!inFile)
    {
      std::cout << "File failed to open" << std::endl;
    }
  else
  outFile.open("updated_phonebook.txt", std::ios::out);
  std::cout << "How many contacts do you want to add?" << std::endl;
  std::cin >> amount;
  contact = new Person[amount];
   std::cout << "Contacts in the previous book n" << std::endl;
   std::cin.ignore();
         while (inFile)
    {
      //dummy stores the contact number which is the first line
      // in the read file. I don't want to carry the number over
      // to the other updated_phonebook.txt file
      std::getline(inFile, dummy);
      std::getline(inFile, contact[count].lName);
      std::getline(inFile, contact[count].fName);
      std::getline(inFile, contact[count].streetAddr);
      std::getline(inFile, contact[count].city);
      std::getline(inFile, contact[count].state);
      std::getline(inFile, contact[count].zip);
      std::getline(inFile, contact[count].phoneNum);
      std::cout << contact[count].lName << std::endl;
      std::cout << contact[count].fName << std::endl;
      std::cout << contact[count].streetAddr << std::endl;
      std::cout << contact[count].city << std::endl;
      std::cout << contact[count].state << std::endl;
      std::cout << contact[count].zip << std::endl;
      std::cout << contact[count].phoneNum << std::endl;

      outFile << contact[count].lName << std::endl;
      outFile << contact[count].fName << std::endl;
      outFile << contact[count].streetAddr << std::endl;
      outFile << contact[count].city << std::endl;
      outFile << contact[count].state << std::endl;
      outFile << contact[count].zip << std::endl;
      outFile << contact[count].phoneNum << std::endl;
      count++;
    }
     // I know this is a little wacky here. 
     // I want the program to display the total amount of contacts
     // to the screen
     total = amount + count;
    for (int index = 0; index < total; index++)
     {
       std::cout << "Last name: ";
       std::getline(std::cin, contact[index].lName);
       std::cout << "First name: ";
       std::getline(std::cin, contact[index].fName);
       std::cout << "Street address: ";
       std::getline(std::cin, contact[index].streetAddr);
       std::cout << "City: ";
       std::getline(std::cin, contact[index].city);
       std::cout << "State: ";
       std::getline(std::cin, contact[index].state);
       std::cout << "Zip code: ";
       std::getline(std::cin, contact[index].zip);
       std::cout << "Phone number: ";
       std::getline(std::cin, contact[index].phoneNum);
       std::cout << std::endl;
       std::cout << "Contact: " << index + 1 << std::endl;
       std::cout << "Last name: " << contact[index].lName << std::endl;
       std::cout << "First name: " << contact[index].fName << std::endl;
       std::cout << "Street address: " << contact[index].streetAddr << std::endl;
       std::cout << "City: " << contact[index].city << std::endl;
       std::cout << "State: " << contact[index].state << std::endl;
       std::cout << "Zip code: " << contact[index].zip << std::endl;
       std::cout << "Phone number: " << contact[index].phoneNum << std::endl;
       std::cout << std::endl;
       outFile << "Last name: " << contact[index].lName << std::endl;
       outFile << "First name: " << contact[index].fName << std::endl;
       outFile << "Street address: " << contact[index].streetAddr << std::endl;
       outFile << "City: " << contact[index].city << std::endl;
       outFile << "State: " << contact[index].state << std::endl;
       outFile << "Zip code: " << contact[index].zip << std::endl;
       outFile << "Phone number: " << contact[index].phoneNum << std::endl;

     }
   inFile.close();
   outFile.close();
   delete [] contact;
return 0; 
}

我试图将用户创建的新联系人和从读取文件中的旧联系人存储在一个动态结构数组中。我得到这个分割错误，因为我使用两个不同的索引"计数"answers"索引"存储在同一个动态数组中的联系人?