error: invalid use of non-static member function ‘bool MyClass::cmp(int, int)’ 看报错信息的字面意思似乎是:因为cmp是非static函数,那如果把cmp定义成static呢?果然编译ok。这是为啥? 这就涉及到第一个问题:static成员函数和非static成员函数有什么区别? 1.类的static成员属于类本身,在类加载时就会分配内...
classMachine{classState*current;public:Machine();voidsetCurrent(State *s){ current = s; }staticvoidon();// I add static here ...staticvoidoff();// and here}; But it complains that Invalid use of member Machine::current in static member function ...
error: invalid use of non-static member function 问题出在编译器不认可传递参数是non-static的类成员函数指针,也就是代码块中的d.fun(temp::foo); 暂且把编译器版本号放在下面: Linux:g++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0 Windows:g++.exe (x86_64-posix-seh-rev0, Built by MinGW-W64 ...
编译报错:MicRecorder.cpp: In member function 'int micrecord::MicRecorderImpl::audioThread(void*)': MicRecorder.cpp:297:79: error: invalid use of non-static member function。 1 2 如果要创建线程函数audioThread为MicRecorderImpl类成员函数,就需要使用静态函数。
C++编译错误"invalid use of non-static data member"通常是由于尝试在非静态上下文中使用静态数据成员或函数返回值造成的。这种错误可能出现在试图对一个静态成员进行操作，或者在函数中返回一个非void类型的值时，没有正确地处理其返回值。在C++编译流程中，几个关键的概念包括：目标文件(obj)：源代码...
class Date { public: int day,month,year; void init(int,int,int); void print_ymd(); }; void Date::init(int yy, int mm, int dd) { year = yy; month = mm; day = dd; } void Date::print_ymd() { std::cout << year << "-" << month << "-" << day << std::endl; ...
"709568706/source.cpp: In function ‘int main()’: 709568706/source.cpp:28:32: error: invalid use of member function ‘static void MessagePoller::poll_timer()’ (did you forget the ‘()’ ?) std::cout << (void*)m_sut->poll_timer << std::endl; ...
I'm having a bad time trying to call a correctly-working expression (ultra[currentSensor].ping_timer(echoCheck)) from an own class method (myclass::run) instead of from void loop(). I'm getting the following compiler error: "invalid use of non-static member funct...
MicRecorder.cpp:297:79: error: invalid use of non-static member function。 1 2 如果要创建线程函数audioThread为MicRecorderImpl类成员函数,就需要使用静态函数。 但是,使用静态函数有两个问题: 1.静态函数不能访问非静态成员; 2.无法实现多实例;