将结构的 c++ 数组保存到文件和问题中以向其添加新元素

我的程序目前有两个主要问题。首先是我无法在程序运行时向程序添加多个帐户(我需要关闭它并重新打开，然后才能添加另一个帐户(。第二个问题是当我不向程序地址添加任何帐户时，会保存到程序中，这就是我不向程序添加任何帐户时文件的样子。

123#John Smith#0#0###-1.07374e+008#-1.07374e+008#

文件的第一部分是正确的，但地址来自内存中的其他地方。这就是我的代码的样子。

#include <iostream> 
#include <iomanip> 
#include <string> 
#include <cmath> 
#include <fstream> 
#include <sstream>
using namespace std;
struct account
{
    string acctNum;
    string name;
    float cBal;
    float sBal;
};
int menu();
char subMenu();
int loadCustomers(account[]);
void saveCusomers(account[], int);
int newCustomer(account[], int);
int deleteCustomer(account[], int);
int findCustomer(account[], int);
void deposit(account[], int);
void withdrawl(account[], int);
void balance(account[], int);
void bankBalance(account[], int);
int main()
{
    account acc[20];
    int selection;
    int numAcc = 0;
    int search;
    numAcc = loadCustomers(acc);
    do
    {
        selection = menu();
        if(selection == 1)
        {
            newCustomer(acc, numAcc);
        }
        else if(selection == 2)
        {
            deleteCustomer(acc, numAcc);
        }
        else if(selection == 3)
        {
            search = findCustomer(acc, numAcc);
            if (search == -1)
            {
                cout << "That account doesn't exist." << endl;
                system("pause");
                system("cls");
            }
            else
            {
                cout << right << setw(3) << acc[search].acctNum << "" << left << setw(15) << acc[search].name << acc[search].cBal << acc[search].sBal << endl;
                system("pause");
                system("cls");
            }
        }
        else if(selection == 4)
        {
            deposit(acc, numAcc);
        }
        else if(selection == 5)
        {
            withdrawl(acc, numAcc);
        }
        else if(selection == 6)
        {
            balance(acc, numAcc);
        }
        else if(selection == 7)
        {
            bankBalance(acc, numAcc);
        }
        else if(selection == 8)
        {
            break;
        }
    } while (selection != 8);
    saveCusomers(acc, numAcc);
    return 0;
}
int menu()
{
    int select;
    cout << "Main Menu" << endl;
    cout << "=============" << endl;
    cout << "1. New Account" << endl;
    cout << "2. Delete Account" << endl;
    cout << "3. Find Customer" << endl;
    cout << "4. Deposit" << endl;
    cout << "5. Withdrawl" << endl;
    cout << "6. Balance" << endl;
    cout << "7. Bank Balance" << endl;
    cout << "8. Exit" << endl;
    cout << "=============" << endl;
    cout << "Enter choice: ";
    cin >> select;
    while (select < 1 || select > 8)
    {
        cout << "Invalid input, select a number between 1 and 8: ";
        cin >> select;
    }
    system("cls");
    return select;
}
char subMenu()
{
    char choice;
    cout << "Which account? <C>hecking or <S>aving: ";
    cin >> choice;
    while(choice != 'C' && choice != 'c' && choice != 'S' && choice != 's')
    {
        cout << "Invalid choice, choose either checking or saving: ";
        cin >> choice;
    }
    return choice;
}
int loadCustomers(account acc[])
{
    ifstream inFile;
    int numCustomers = 0, i = 0;
    string ctemp, stemp;
    inFile.open("customer.dat");
    if (!inFile)
    {
        cout << "No customer file found." << endl;
    }
    else
    {   
        cout << "Customer file found..." << endl << endl;
        while (getline(inFile, acc[i].acctNum, '#'))
        {
            getline(inFile, acc[i].name, '#');
            getline(inFile, ctemp, '#');
            getline(inFile, stemp, '#');
            istringstream(ctemp) >> acc[i].cBal;
            istringstream(stemp) >> acc[i].sBal;
            i++;
            numCustomers++;
        }
        cout << "Number of customers found in file: " << numCustomers << endl;
    }
    system("pause");
    system("cls");
    inFile.close();
    return numCustomers;
}
void saveCusomers(account acc[], int numCustomers)
{
    ofstream outFile;
    outFile.open("customer.dat");
    for (int i = 0; i < numCustomers; i++)
    {
        outFile << acc[i].acctNum;
        outFile << '#';
        outFile << acc[i].name;
        outFile << '#';
        outFile << acc[i].cBal;
        outFile << '#';
        outFile << acc[i].sBal;
        outFile << '#';
    }
    outFile << acc[numCustomers].acctNum;
    outFile << '#';
    outFile << acc[numCustomers].name;
    outFile << '#';
    outFile << acc[numCustomers].cBal;
    outFile << '#';
    outFile << acc[numCustomers].sBal;
    outFile << '#';
    cout << numCustomers + 1 << " accounts saved into the file." << endl;
    outFile.close();
}
int newCustomer(account acc[], int numCustomers)
{   
    cout << "New Customer" << endl;
    cout << "============" << endl;
    cout << "Enter account number: ";
    cin >> acc[numCustomers].acctNum;
    cout << "Enter name: ";
    cin.ignore();
    getline(cin, acc[numCustomers].name);
    acc[numCustomers].cBal = 0;
    acc[numCustomers].sBal = 0;
    numCustomers++;
    return numCustomers;
}
int deleteCustomer(account[], int)
{
    return 0;
}
int findCustomer(account acc[], int numCustomers)
{
    string target;
    cout << "Enter the account number you are looking for: ";
    cin >> target;
    for (int i = 0; i < numCustomers; i++)
    {
        if (acc[i].acctNum == target)
        {
            return i;
        }
    }
    return -1;
}

如何更改此设置，以便在程序运行时添加多个帐户，以及如何使程序在未添加任何内容时不会将地址保存到我的文件中？我还想知道为什么这些地址被这样保存。