我想做以下几件事:
#include <memory>
#include <vector>
#include <queue>
int main() {
std::vector<std::queue<std::unique_ptr<int>>> v;
v.resize(10);
}
但是我和GCC一起得到了10.2:
$ g++ test.cpp -o test
In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/include/g++
我正在测试将处理过程中的模拟转换为C++的可能性。但有些奇怪的事情发生了:
class World {
public:
sarray<pAnt> dummy1 { new array<pAnt>(10) };//OK
sarray<pAnt> dummy2 = new array<pAnt>(10); //Compiler error?!?!?!*
smatrix<pAnt> dummyWorld1 { new matrix<pAnt>(100,100) };//OK
我有一个类,Matrix
class Matrix
{
private:
int cols;
int rows;
int **matrix;
public:
//constructors and methods
friend Matrix addandupdate(Matrix a, Matrix b);
}
我在外部定义了函数addandupdate,如下所示
Matrix addandupdate(Matrix a, Matrix b)
{
int rsize = a.rows;
int csize = a.cols;
M
在我非常简单的C++项目中,g++编译器抛出了非常奇怪的错误。以下错误:
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/ios:39,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/ostream:40,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.6/
有可能吗?
#include <array>
#include <initializer_list>
struct A
{
A ( std::initializer_list< int > l )
: m_a ( l )
{
}
std::array<int,2> m_a;
};
int main()
{
A a{ 1,2 };
}
但这会导致以下错误:
t.cpp: In constructor ‘A::A(std::initializer_list<int>)’:
t.
我已经阅读了一些关于这个主题的文章,但在编译我自己的代码时仍然有问题。
我有A班:
class A
{
public:
List<int> data;
A(){}
A(A&){}
A& operator= (const A& a)
{
// copy the data from a to data
}
};
类B将调用类A:
class B
{
public:
A makeA()
{
A a;
return a
下面的编译错误就是我所知道的:
/usr/lib/qt-3.3/include/qobject.h: In copy constructor Product::Product(const Product&):
/usr/lib/qt-3.3/include/qobject.h:211: error: QObject::QObject(const QObject&) is private
Product.h:20: error: within this context
HandleTCPClient.cpp: In member function int Handler::Han
我有这个代码(文件名是test.jl),它是一个更复杂的代码的简化版本: using Distributed, SharedArrays
using LinearAlgebra
using PyCall
@everywhere @pyimport scipy.optimize as so
function fun() # Coupling constants
Ntraj = 2
Ntime = 10
result = @distributed (+) for ktraj = 1 : Nt