dynamic-memory-allocation

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Dynamic memory allocation question

when you allocate dynamic memory on the heap using a pointer, char *buffer_heap = new char[15]; it would b开发者_开发技巧e represented in memory as:[详细]

2022-12-20 14:28 分类：问答
ALLOCATABLE arrays or POINTER arrays?

I am writing a new code in Fortran and hesitating between using allocatable arrays or pointer arrays. I read somewhere that allocatable arrays have significant advantages over pointer arrays:[详细]

2022-12-20 14:27 分类：问答
Is it safe to pass (synchronously) stack-allocated memory to other thread?

Recently I heard that memory in the stack is not shared with other thread and memory in the heap is shared with other threads.[详细]

2022-12-19 16:50 分类：问答
dynamic memory in QList

I don\'t have much experience with QT and this problem came out today. QList<int> memList; const int large = 100000;[详细]

2022-12-19 11:05 分类：问答
Pass by reference 2D dynamically allocated double array in C

I\'m trying to convert my string into a dynamic array of doubles. Each space of my string represents a column, each \";\" represents a new row. When this code runs, it only works for when *F[0][col].[详细]

2022-12-17 18:23 分类：问答
Allocating an array of Derived without new[]: Pointer to Base vtable is bad

Basically, I have a pure virtual class Base, and a concrete class Derived which inherits from Base. I then allocate a piece of memory and treat it as an array of Derived via a simple cast. Then, I pop[详细]

2022-12-16 05:31 分类：问答
Pointer won't return with assigned address

I\'m using Qt Creator 4.5 with GCC 4.3 and I\'m having the following problem that I am not sure is Qt or C++ related: I call a function with a char * as an input parameter. Inside that function I make[详细]

2022-12-10 07:50 分类：问答
Storing data of unknown size in C++

I\'ve been using PHP for about 4 years, however I\'ve come across a problem that requires something with slightly (:P) better performance and so I\'ve chosen C++.[详细]

2022-12-09 23:05 分类：问答
Can you define the size of an array at runtime in C

New to C, thanks a lot for help. Is it possible to define an array in C without either specifying its size or initializing it.[详细]

2022-12-09 12:05 分类：问答
Storing heterogeneous objects in vector with stack-allocated objects

Storing objects in heterogeneous vector with stack-allocated objects Hello, Say I have an abstract class CA, derived into CA1, CA2, and maybe others.[详细]

2022-12-09 05:19 分类：问答