Question

我在打印课程时遇到问题。我希望此类读取二进制数，然后打印出来。我是一个初学者，所以这里可能是一个非常愚蠢的错误。该代码输出错误，但输入正确。我试图解决此问题，但无法解决。希望您会发现错误。请帮忙。谢谢！

代码如下：

using (ProductContext db = new ProductContext())
{
    log.Info("Checking for expired data in the Product Data db");
    //rule = now - configured hours, default = 2 hours in past.
    var checkWindow = Convert.ToInt32(PRODUCTMAPPING_CONFIG.MinusExpiredWindowHours);
    var dtCheck = Convert.ToDateTime(DateTime.Now.AddHours(-checkWindow).ToString("s"));

    // Ammended DB Table from nvarchar to DateTime to allow direct comparison based on comment by: Panagiotis Kanavos
    // Removed ToList() which returned the IEnumerable immediately based on comment by: jdweng
    var rowData = db.ProductData.Where(le => le.ProductEndDate < dtCheck);

    log.Info($"Number of expired Products being removed: {rowData.Count()}");

    // added print out on debug only.
    if(log.IsDebugEnabled)
        rowData.ToList().ForEach(i => {log.Debug($"DB Row ID {i.Id} with Product ID Value: {i.ProductUid} has expired with Product End Date: {i.ProductEndDate}, marked for removal."); });


    var rowCount = rowData.Count();

    db.ProductData.RemoveRange(rowData);
    db.SaveChanges();

    log.Info(rowCount == 0
        ? "No expired data present."
        : $"Number of expired assets Successfully removed from database = {rowCount}");
}

Answer 1

问题出在这行代码上：

        out << b.arr;

您正在打印数组指针b.arr，而不是数组中的值。

这将起作用：

        out << b.arr[i] ? '1' : '0';

您还应该考虑编写析构函数以释放先前分配的内存，并在覆盖此行的指针之前释放先前的数组：

b.arr = new bool[b.len];

我在阅读和打印我的课程时遇到问题

1 个答案: