使用数组和文件时收到未知的访问冲突

Question

几个月前我刚刚开始学习如何编程，这是我的第一种编程语言。我编写了这个程序，从“BeginningBalance.dat”中提取客户编号以及客户购买和付款。

读取每个客户的费用后，它将添加财务费用并总计所有内容，然后它将以相反的顺序写入每个客户编号的新期末余额。

所以 begindata.dat 看起来像

111
200.00
300.00
50.00
222
300.00
200.00
100.00

并且 NewBalance.dat 应该看起来像

222
402.00
111 
251.00

现在所有被读入 NewBalance.dat 的内容是 -858993460-9.25596e+061333655222402111251-858993460

如果有人可以提供帮助，这是我的代码。

#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;

int main()
{
    int count = 0;
    const int size = 100;
    double customer_beg_balance, customer_purchases, customer_payments, finance_charge_cost, finance_charge = .01;
    int customer_number[size];
    double new_balance[size];
    double total_beg_balances=0,total_finance_charges=0,total_purchases=0,total_payments=0,total_end_balances=0;

    ifstream beginning_balance;
    beginning_balance.open("beginningbalance.dat");

    while(beginning_balance>>customer_number[count])
    {
        beginning_balance >> customer_beg_balance;
        beginning_balance >> customer_purchases;
        beginning_balance >> customer_payments;

        finance_charge_cost = customer_beg_balance * finance_charge;

        new_balance[count] = customer_beg_balance + finance_charge_cost + customer_purchases - customer_payments;
        total_beg_balances+=customer_beg_balance;
        total_finance_charges+=finance_charge_cost;
        total_purchases+=customer_purchases;
        total_payments+=customer_payments;
        total_end_balances+=new_balance[count];

        cout<<fixed<<setprecision(2)<<setw(8)
            <<"Cust No  "<<"Beg. Bal.  "<<"Finance Charge  "<<"Purchases  "<<"Payments  "<<"Ending Bal.\n"
            <<customer_number[count]<<"        "
            <<customer_beg_balance<<"        "
            <<finance_charge_cost<<"       "
            <<customer_purchases<<"     "
            <<customer_payments<<"         "
            <<new_balance[count]<<endl;


        count++;
    }

    cout<<"\nTotals     "
        <<total_beg_balances<<"        "
        <<total_finance_charges<<"       "
        <<total_purchases<<"     "
        <<total_payments<<"         "
        <<total_end_balances<<endl;

    ofstream new_balance_file;
    new_balance_file.open("NewBalance.dat");

    while(new_balance_file << customer_number[count] && count >= 0)
    {
        new_balance_file << new_balance[count];
        count--;
    }

    new_balance_file.close();

    system("pause");
    return 0;
}

Answer 1

while(new_balance_file << customer_number[count])
{
    new_balance_file << new_balance[count];
    count--;
}

不对。由于不限制计数，因此您将遍历数组的开头并开始负访问。

Answer 2

一般来说，内存读取期间的访问冲突意味着您犯了一个指针数学错误（在这种情况下不太可能，因为您没有进行任何指针数学）或者您已经读取了明显超过结尾或开始之前的内容一个数组的。

Answer 3

学习在启用所有警告和调试信息的情况下进行编译。对于 GCC，这意味着 g++ -Wall -g。然后学习如何使用调试器（例如 Linux 的 gdb）并逐步运行程序。