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Questions tagged c++

5789 questions · page 1 of 116

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8
votes
5
answers

when does a function have to return a reference in c++

c++
asked 2013-08-05T17:45:10.880
26
votes
3
answers

C++: Multiple exit conditions in for loop (multiple variables): AND -ed or OR -ed?

c++ for-loop multiple-conditions
asked 2013-08-05T16:56:21.450
10
votes
3
answers

error: expected unqualified-id before ‘.’ token //(struct)

c++ struct
asked 2013-08-05T16:02:01.410
23
votes
4
answers

How to store extremely large numbers?

c++ data-structures int large-data
asked 2013-08-05T14:06:23.083
10
votes
1
answers

JNI calling Java from C++ with multiple threads

c++ multithreading qt java-native-interface runtime-error
asked 2013-08-05T10:48:37.140
17
votes
3
answers

How do I stop Windows from blocking the program during a window drag or menu button being held down?

c++ c winapi windows-messages
asked 2013-08-04T09:42:26.540
12
votes
5
answers

Why does setting an element of a map to its size increments the size *before* assigning it?

c++ dictionary assignment-operator
asked 2013-08-04T05:37:28.550
17
votes
1
answers

boost log file not written to

c++ boost boost-log
asked 2013-08-03T16:09:06.097
20
votes
5
answers

Why the constructor of std::ostream is protected?

c++ iostream ostream
asked 2013-08-03T09:28:25.017
12
votes
3
answers

Vim, C++, YCM, and Syntastic include path problems

c++ vim syntastic
asked 2013-08-03T00:35:02.783
15
votes
1
answers

Error: sys/wait.h: No such file or directory

c++ c windows shell
asked 2013-08-02T09:52:52.153
8
votes
1
answers

Compile times with boost::signals2 very slow

c++ performance boost visual-studio-2012 compilation
asked 2013-08-01T21:44:33.857
11
votes
1
answers

expected a qualified name after 'typename'

c++
asked 2013-08-01T15:21:05.067
20
votes
10
answers

Convert a unicode String In C++ To Upper Case

c++ string unicode
asked 2013-08-01T10:25:30.833
20
votes
6
answers

How can I use imshow to display multiple images in multiple windows?

c++ opencv
asked 2013-08-01T07:22:53.110
49
votes
6
answers

How do I add elements to an empty vector in a loop?

c++ vector insert
asked 2013-08-01T02:29:05.320
15
votes
7
answers

How can i get the top n keys of std::map based on their values?

c++ c++11
asked 2013-07-31T07:13:55.553
17
votes
2
answers

Fast way to generate code functions from header functions in Visual Studio?

c++ visual-studio
asked 2013-07-31T04:31:20.197
9
votes
2
answers

#ifdef not working as expected with precompiled headers

c++ macros
asked 2013-07-31T04:06:38.383
32
votes
2
answers

How to compile code from stdin?

c++ linux gcc
asked 2013-07-30T13:03:10.813
8
votes
9
answers

Can we declare a friend function with no argument?

c++ class friend-function
asked 2013-07-30T08:22:40.753
25
votes
3
answers

Can we overload operators for built-in types like int or float?

c++ overloading
asked 2013-07-30T08:08:52.067
94
votes
6
answers

Fast textfile reading in C++

c++ performance io ifstream
asked 2013-07-29T13:12:45.757
11
votes
4
answers

What is the difference between a proper defined union and a reinterpret_cast?

c++ unions reinterpret-cast
asked 2013-07-29T12:16:13.040
93
votes
5
answers

Why does std::array not have an constructor that takes a value for the array to be filled with?

c++ c++11 stdarray
asked 2013-07-29T12:11:32.163
19
votes
2
answers

accessing pixel value of gray scale image in OpenCV

c++ opencv image-processing
asked 2013-07-29T08:36:22.957
14
votes
2
answers

remove gradient of a image without a comparison image

c++ opencv image-processing gradient
asked 2013-07-28T23:32:06.717
10
votes
2
answers

Pointers vs. References in C++ function arguments

c++ pointers
asked 2013-07-27T16:28:46.990
13
votes
3
answers

Example of C++ "Memory barrier"

c++ multithreading volatile memory-barriers
asked 2013-07-27T13:07:19.667
9
votes
1
answers

Do we still need "placement new" and "operator new"?

c++
asked 2013-07-26T18:22:55.073
12
votes
8
answers

reading last n lines from file in c/c++

c++ file
asked 2013-07-26T08:54:01.137
38
votes
9
answers

Get index of element in C++ map

c++ dictionary indexing std
asked 2013-07-25T15:58:59.103
13
votes
1
answers

Pass template args by const& or &&

c++ c++11
asked 2013-07-25T09:24:06.530
12
votes
1
answers

What are allocators and when is their use necessary?

c++ stl allocator
asked 2013-07-25T02:49:36.257
30
votes
2
answers

struct alignment C/C++

c++ c memory-layout
asked 2013-07-24T21:27:57.820
12
votes
1
answers

Accessing boost fusion map field name

c++ dictionary boost-fusion
asked 2013-07-24T13:38:14.337
13
votes
3
answers

c++ copy constructor with shared_ptr members

c++ shared-ptr copy-constructor
asked 2013-07-24T12:04:29.967
9
votes
1
answers

Qt5.1 failed to load platform plugin xcb

c++ qt ubuntu
asked 2013-07-24T06:37:49.030
17
votes
2
answers

Calling Haskell library from C++

c++ haskell interface ffi
asked 2013-07-23T16:27:50.597
11
votes
5
answers

static and dynamic memory allocation of objects in C++

c++
asked 2013-07-23T15:11:45.617
8
votes
3
answers

User defined natvis files in Visual Studio 2012

c++ visual-studio-2012 debuggervisualizer natvis
asked 2013-07-23T13:29:50.140
11
votes
2
answers

zero initialization and static initialization of local scope static variable

c++ static initialization global-variables
asked 2013-07-23T03:35:31.060
10
votes
11
answers

clrscr(); equivalent in Code::Blocks

c++ codeblocks
asked 2013-07-22T16:47:27.707
31
votes
2
answers

Can Tail Call Optimization and RAII Co-Exist?

c++ recursion compiler-construction tail-recursion raii
asked 2013-07-22T16:37:06.497
59
votes
2
answers

Why doesn't `std::initializer_list` provide a subscript operator?

c++ c++11 iterator operator-overloading initializer-list
asked 2013-07-22T12:18:40.023
77
votes
5
answers

initial value of reference to non-const must be an lvalue

c++ pointers reference
asked 2013-07-21T10:34:25.677
9
votes
1
answers

SSE reduction of float vector

c++ sum sse simd reduction
asked 2013-07-20T10:16:49.817
9
votes
3
answers

Is there any equivalent of getch() from C++ in Java?

java c++ console-application
asked 2013-07-20T05:50:28.587
17
votes
5
answers

Intrinsics for CPUID like informations?

c++ intrinsics cpuid
asked 2013-07-20T03:40:39.920
11
votes
1
answers

loss of const volatile qualifiers

c++ templates volatile
asked 2013-07-19T14:46:50.517
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