I'm having some issue with memory on the heap. See I'm trying to doing polymorphism, and so I allocate an array of pointers of the base class of the polymorphic hierarchy of classes I'm using. However, I'm running into the issue that when I assign memory on the heap to the pointers in my array of pointers, this memory is being deleted later on in the program. the pointers that
我在堆上遇到了一些问题。 看到我试图做多态，所以我分配了我使用的类的多态层次结构的基类的指针数组。 然而，我遇到了这样的问题，即当我将堆中的内存分配给指针数组中的指针时，此内存将在程序中稍后被删除。 指向动态分配内存的指针不会超出范围，但由于某些原因，指向指针的数据正变得无法访问/删除 #include "OverNightPackage.h" #include "TwoDayPackage.h" #include <iostream> #include <string> usi
I am pretty new to C++ and trying to understand the concept of stack and heap as much as I can (or at least as much as I need to know). Some people tend to say that a starter shouldn't bother that much but it seems to me that a memory leak or stack overflow can occur pretty easily. I have been reading some stuff but I am still a little confused and unsure if I got it right. Here is what I
我对C ++相当陌生，尽可能多地理解堆栈和堆的概念（或者至少和我需要知道的一样多）。 有些人倾向于说，初学者不应该打扰太多，但在我看来，内存泄漏或堆栈溢出很容易发生。 我一直在阅读一些东西，但我仍然有点困惑，不确定我是否正确。 这是我到目前为止... 1.堆： 堆是一个共享和动态分配的区域。 我们的流程的任何部分都可以通过正确的指针和内容知识（类型和长度）来访问。 如果我们尝试使用错误的指针（平凡的地
Where exactly is the 'this' pointer stored in memory? Is it allocated on the stack, in the heap, or in the data segment? #include <iostream> using namespace std; class ClassA { int a, b; public: void add() { a = 10; b = 20; cout << a << b << endl; } }; int main() { ClassA obj; obj.add(
“this”指针究竟存储在内存中的什么位置？ 它是在堆栈，堆中还是在数据段中分配的？ #include <iostream> using namespace std; class ClassA { int a, b; public: void add() { a = 10; b = 20; cout << a << b << endl; } }; int main() { ClassA obj; obj.add(); return 0; } 在上面的代码中，我调用成员函数
I'm still a fairly novice programmer and I have a question about c++ memory management with refence types. First of all, my understanding of reference types: A pointer is put on the stack and the actual data that the pointer points to is created and placed on the heap. Standard arrays and user defined classes are refence types. Is this correct? Second, my main question is do c and c++&
我仍然是一个相当新手的程序员，我有一个关于c ++内存管理与refence类型的问题。 首先，我对参考类型的理解： 指针放在堆栈上，并且指针指向的实际数据被创建并放置在堆上。 标准数组和用户定义的类是refence类型。 它是否正确？ 其次，我的主要问题是，c和c ++的内存管理机制（malloc，free和new，delete）总是能够正确处理这个问题，并释放类或数组指向的内存？ 如果这些指针以某种方式重新分配给堆上相同大小/类型的
I'm implementing a compacting garbage collector for my own personal use in C++0x, and I've got a question. Obviously the mechanics of the collector depend upon moving objects, and I've been wondering how to implement this in terms of the smart pointer types that point to it. I've been thinking about either pointer-to-pointer in the pointer type itself, or, the collector maintain
我在C ++ 0x中为自己的个人使用实现了一个压缩垃圾收集器，并且我有一个问题。 很明显，收集器的机制取决于移动的对象，我一直想知道如何通过指向它的智能指针类型来实现这一点。 我一直在考虑指针类型本身的指针指针，或者，收集器维护一个指向每个对象的指针列表，以便它们可以被修改，在访问时不需要双重de-ref指针但在收集和额外的内存开销期间增加额外的开销。 去这里最好的方式是什么？ 编辑：我主要关心的是快速分配
We want to work on low latency system, heap allocation is costlier in the application. but for some extent object creation on heap is allowed. Thats why we want indication whether object is created is on heap or not..? Is the below methodology is the correct way to find out object created on heap memory..? Will have generic class where new and delete operator is overloaded to maintain heap
我们希望在低延迟系统上工作，堆分配在应用程序中成本较高。 但是在某种程度上允许在堆上创建对象。 这就是为什么我们想要指示对象是否被创建在堆上？ 下面的方法是找到在堆内存上创建的对象的正确方法。 将有新的泛型类和删除操作符被重载，以维持堆分配指针.... #include <iostream> #include <set> using namespace std; class MemStat //base class { typedef set<MemStat*> POI
If I declare a data structure globally in a C++ application , does it consume stack memory or heap memory ? For eg struct AAA { .../.../. ../../.. }arr[59652323]; Since I wasn't satisfied with the answers, and hope that the sameer karjatkar wants to learn more than just a simple yes/no answer, here you go. Typically a process has 5 different areas of memory allocated Code - text segm
如果我在C ++应用程序中全局声明数据结构，它会消耗堆栈内存还是堆内存？ 例如 struct AAA { .../.../. ../../.. }arr[59652323]; 由于我对答案不满意，并希望同一个karjatkar想要学习的不仅仅是一个简单的是/否的答案，在这里你去。 通常一个进程分配了5个不同的内存区域 代码 - 文本段 初始化数据 - 数据段 未初始化的数据 - bss段 堆 堆 如果你真的想知道什么是保存在哪里然后阅读和书签这些： 编译器
For context, I am using Qt 5.3.1 with Xcode 5.1.1 on OSX 10.9. After some struggle, I was finally able to get my application's PKG file to upload through Application Loader and appear in my "Prerelease" build list for my App in iTunes Connect. However, once I add the build to the app and click "Submit for Review" I get the following slew of errors: ITC.apps.assetvalida
对于上下文，我在OSX 10.9上使用Qt 5.3.1和Xcode 5.1.1。 经过一番努力之后，我终于可以通过Application Loader上传我的应用程序的PKG文件，并出现在我的应用程序iTunes Connect的“预发布”版本列表中。 但是，一旦我将该版本添加到应用程序并单击“提交以供查看”，我会得到以下错误： ITC.apps.assetvalidation.DESKTOP_MISSING_NESTED_BUNDLE_IDENTIFIER.error.message The Info.plist of the nested bundle must contain a v
Rather perplexed by this omission--but in Qt's QAbstractItemView class, it's possible to set a QAbstractItemDelegate (ie, QItemDelegate or QStyledItemDelegate) to the entire view, a single row, or a single column, using the setItemDelegate* methods. In addition the item delegate for an individual cell can be queried, with QAbstractItemView::itemDelegate(const QModelIndex&) , along wi
这种遗漏让Quest感到困惑 - 但在Qt的QAbstractItemView类中，可以使用setItemDelegate*方法将QAbstractItemDelegate（即QItemDelegate或QStyledItemDelegate）设置为整个视图，单个行或单个列。 另外，可以使用QAbstractItemView::itemDelegate(const QModelIndex&)查询单个单元格的项目委托，以及行，列的委托。 和整个视图。 但似乎没有办法将物品代理设置到单个单元。 我错过了什么吗？ 这应该是什么原因？ 不，您
I have just read about subobjects in the Standard saying this: A subobject can be a member subobject (9.2), a base class subobject (Clause 10), or an array element. I have encountered a lot of situations when reading about C++ where subojects were mentioned without even having a subobject(explicitly defined) in the derived class. But does this mean that whenever a class has a base class, th
我刚刚阅读了标准中的子对象，他说： 子对象可以是成员子对象（9.2），基类子对象（子句10）或数组元素。 在阅读有关提及子对象的C ++时，在派生类中甚至没有子对象（明确定义）的情况下，我遇到过很多情况。 但是这是否意味着只要一个类有一个基类，编译器就会在派生类中隐式地添加一个基类类型的对象？ 喜欢： class Base { }; class Derived : Base { }; 那么在Derived中添加了Base的子对象？ 标准中有什么我应该