要对vector中的自定义类型进行排序,首先需要提供一个函数bool comp(const Interval & a, const Interval & b) 来定义类型的排序准则 然后调用std::sort(intervals.begin(),intervals.end(),comp) 写了几个小的测试用例也都通过了,但是当集成在类中的时候编译遇到问题, Line 30: no matching function for call to 'sort(std::vector<Int…
背景:一个线程通过signal-slot发送PVCI_CAN_OBJ类型的值到主线程中, 错误提示: QObject::connect: Cannot queue arguments of type 'PVCI_CAN_OBJ' (Make sure 'PVCI_CAN_OBJ' is registered using qRegisterMetaType().) 原因:在线程中通过signal-slot传递信息时,参数默认放到队列中的,但PVCI_CAN_OBJ是自定义的参数,不是Qt自带的参数…
Qt提示: QObject::connect: Cannot queue arguments of type 'FrequencySpectrum' (Make sure 'FrequencySpectrum' is registered using qRegisterMetaType().) 解决: 在connect之前添加如下,FrequencySpectrum为信号与槽形参类型 qRegisterMetaType<FrequencySpectrum>("FrequencySpe…
环境:codeblocks 语言:C++ 在执行:throw new exception("queue is empty.");时 遇到问题:error: no matching function for call to 'std::exception:exception(const char[16])' 解决办法:修改为 std::logic_error e("xxx."); throw std::exception(e);…
Error no matching function for call to 'std::exception::exception(const char [15])' Error 'logic_error' was not declared in this scope 错误原因 C++在使用VS 编译时抛出异常可以用下列语句: throw std::exception("XXX"); 但使用Dev-C++ (GCC) 编译时,会报以下错误: Error no matching func…
This question already has an answer here: External calls are not supported - CUDA 1 answer I am trying to understand how to decouple CUDA __device__ codes in separate header files. I have three files. File: : int2.cuh #ifndef INT2_H_ #define INT2_H_…
环境:在VirtualBox中安装了Ubuntu虚拟机,网络使用了NAT模式,开启了端口转发. 局域网内其他计算机访问虚拟机中的MySQL Server出现两个问题: Lost connection to MySQL server at 'reading initial communication packet, system error: 0 以及 host is not allowed to connect mysql 1.解决Lost connection to MySQL server…
在使用MySQL-Front连接mysql的时候发生的这个错误 ERROR 1130: Host xxx is not allowed to connect to this MySQL server 更改 mysql 数据库里的 user表里的 host项localhost改称% mysql -u root -p mysql>use mysql; mysql>update user set host = '%' where user ='root'; 经过实际测试,有些情况下执行这条语句会报…
我在QGraphicsScene子类中添加了item的弹出菜单,并连接Action到槽函数,结果槽函数不起作用,输出:QObject::connect: No such slot *** C++ Code 12345678910111213141516171819202122232425 //选中item后弹出右键菜单 if (event->button() == Qt::RightButton) { m_pItemSelected = nullptr; foreach …
错误信息 [ERROR ] Error parsing configuration file: /etc/salt/minion - conf should be a document, not <type 'str'>. [ERROR ] DNS lookup of 'salt' failed. 修改minion文件的master是漏了空格 #master: salt 应该修改为 master:空格ip…
