c++ - "corrupted"程序结束

Question

嘿，我的代码在执行后说“帐户”已损坏...

这是什么意思，我该如何解决？

#include <iostream>
#include <iomanip>

using namespace std;

class BankAccount
{
private:
    int accountNum;
    double accountBal;
    const static double annualIntRate;
public:
    void enterAccountData(int, double);
    //void computeInterest();
    //void displayAccount();
};

// implementation section:
//const double BankAccount::annualIntRate = 0.03;
void BankAccount::enterAccountData(int number, double balance)
{
    cout << setprecision(2) << fixed;
    accountNum = number;
    accountBal = balance;

    cout << "Enter the account number " << endl;
    cin >> number;

    while(number < 0 && number <= 999)
    {
        cout << "Account numbers cannot be negative or less than 1000 " <<
                "Enter a new account number: " << endl;
        cin >> number;
    }

    cout << "Enter the account balance " << endl;
    cin >> balance;

    while(balance < 0)
    {
        cout << "Account balances cannot be negative. " <<
                "Enter a new account balance: " << endl;
        cin >> balance;
    }
    return;
}
/*void BankAccount::computeInterest()
{

}*/

int main()
{
    const int QUIT = 0;
    const int MAX_ACCOUNTS = 10;
    int counter;
    int input;
    int number = 0;
    double balance = 0;

    BankAccount accounts[MAX_ACCOUNTS];
    //BankAccount display;
    do
    {
        counter = 0;
        accounts[MAX_ACCOUNTS].enterAccountData(number, balance);
        cout << " Enter " << QUIT << " to stop, or press 1 to proceed.";
        cin >> input;
        counter++;
    } while(input != QUIT && counter != 10);

    system("pause");
    return 0;
}

Answer 1

accounts[MAX_ACCOUNTS].enterAccountData(number, balance);

大概你的意思是:

accounts[counter].enterAccountData(number, balance);

accounts[MAX_ACCOUNTS] 不存在:accounts 数组中有 MAX_ACCOUNTS 元素，它们的索引从零开始。您还需要将 counter 的初始化移到循环之外，否则您根本就没有在计算任何东西!

另请注意，您的输入处理不正确。如果您在提示输入新帐号时键入 hello，您的程序将停止运行，因为您没有检查 the state of the stream以确保提取成功。 C++ 中的惯用输入操作看起来像这样:

int number;
if (!(std::cin >> number)) {
    // o noez! The user didn't type in a number at all! Handle the error here...
}

在处理错误时，如果你想继续从流中读取，你需要使用它的clear()成员函数来重置状态标志和它的ignore() 跳过无效输入的成员函数。

处理控制台输入时，总是将字符串读入 std::string 然后使用 std::stringstream 解析字符串通常更容易；这允许更简单、更直接的错误处理，因为您不必处理从 std::cin 中清除无效字符，您可以直接丢弃 std::stringstream 轻松重新开始。