内存访问越界或者写入位置发生冲突该怎么解决？

我把代码都展出来吧
#ifndef LIBRARY_H
#define LIBRART_H
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std ;

class Library
{
public:
Library();
~Library();
void ShowData(const char[],const char[] );

private:
string BookID[10] ; //书的型号
char *BookTitle ; //书名
char *FirstName ; //书名
char *LastName ; //书名
int PublicationYear[10]; //出版年份
int CopyNumber[10] ; //每种书的数量
int AvailableNumber[5] ; // 还可借书的数量
string ID[10] ; //借书者的ID
char *firstname ; //人名
char *lastname ; //人名
int loanednumber[5] ; //借书的数量
int loanedtotal ; // 借书的总数
int CopyTotal ; // 书的总数
string bookid[5] ; //借的书的型号的数量

};

#endif
#include "Library.h"

Library::Library()
{
char *BookTitle = new char[100] ; //书名
char *FirstName = new char[100] ; //书名
char *LastName = new char[100] ; //书名
int AvailableNumber[5] = {0} ; // 还可借书的数量
char *firstname = new char[100] ; //人名
char *lastname = new char[100] ; //人名
loanedtotal = 0 ; // 借书的总数
CopyTotal = 0 ; // 书的总数
}

Library::~Library()
{
delete [] BookTitle ;
delete [] FirstName ;
delete [] LastName ;
delete [] firstname ;
delete [] lastname ;

}

void Library::ShowData(const char BookRecord[],const char Borrower[])
{
ifstream InBookRecord ;
InBookRecord.open(BookRecord) ;
int i = 0 ;
int n ;
if (!InBookRecord.is_open())
{
cout << "File could not be opened." ;
}
else
{
while (!InBookRecord.eof())
{
InBookRecord >> BookID[i] >> BookTitle[i] >> FirstName[i]
>> LastName[i] >> PublicationYear[i] >> CopyNumber[i] ;
i++ ;
}
}
n = i ;
InBookRecord.close();
for (int x=0;x<n;x++)
{
CopyTotal += CopyNumber[x] ;
}

ifstream InBorrower ;
InBorrower.open(Borrower) ;
int j = 0 ;
int m ;
if (!InBorrower.is_open())
{
    cout << "File could not be opened.";
}
else
{
    while (!InBorrower.eof())
    {
        InBorrower >> ID[j] >> firstname[j] >> lastname[j]
        >> loanednumber[j] ;
        for (int z=0;z<loanednumber[j];z++)
        {
            InBorrower >> bookid[z] ;
        }
        j++ ;
    }
}
m = j ;
InBorrower.close() ;
for (int y=0;y<m;y++)
{
    loanedtotal += loanednumber[y] ;
}

for (int x=0;x<n;x++)
{
    for (int y=0;y<m;y++)
    {
        for (int z=0;z<loanednumber[j];z++)
        {
            if (BookID[x] == bookid[z])
            {
                AvailableNumber[x]++ ;
            }
        }
    }
}

cout << "Total number of books on loan:" << loanedtotal << endl ;
cout << "Total number of books in catalogue:" << (CopyTotal-loanedtotal) << endl ;

for (int x=0;x<n;x++)
{
    if (BookID[x].at(0)>='A'&&BookID[x].at(0)<='Z'&&PublicationYear[x]>=1000&&PublicationYear[x]<=2999)
    {

       cout << "BookRecord" << x << endl << endl ;
       cout << "=============" << endl << endl ;
       cout << "Book ID:" << BookID[x] << endl << "Title:"<< BookTitle[x] << endl 
            << "Author:" << FirstName[x] << " " << LastName[x] << endl 
            << "Year published:" << PublicationYear[x] << endl
            << "Total number of copies:" << CopyNumber[x] << endl
            << "Number available for loan:"  << (CopyNumber[x] - AvailableNumber[x]) << endl << endl ;
    }
}

for (int y=0;y<m;y++)
{
    if (ID[y].length()==5&&loanednumber[y]>=0&&loanednumber[y]<=5)
    {

      cout << "Borrower" << y << endl << endl ;
      cout << "=============" << endl << endl ;
      cout << "Borrower ID:" << ID[y] << endl
        << "Name:" << firstname[y] << " " << lastname[y] << endl 
        << "Number of loaned books: "<< loanednumber[y] << endl 
        << "IDs of books on loan: " ;
      for(int z=0;z<loanednumber[y];z++)
      {
          cout << bookid[z] << " " ;
      }
    }
}
}