in-class initialization of static data member in-class initialization of static data member 在C++中，static数据成员是指在类中声明的静态变量，其值在所有类对象之间共享。在类定义外，必须进行初始化操作。C++提供了两种初始化static数据成员的方法，一个是在类外定义时在前面使用
class MyClass { public: static int staticMember; }; int MyClass::staticMember = 42; ``` 在上述示例中,我们定义了一个名为`staticMember`的`int`类型的静态成员,初始值为`42`。通过这种方式,我们可以确保`staticMember`在程序中的任何地方都有一个常规的初始值。 如果你没有在线定义静态成员,那么该变量...
In C++11, non-staticdata members,static constexprdata members, andstatic constdata members of integral or enumeration type may be initialized in the class declaration. e.g. struct X { int i=5; const float f=3.12f; static const int j=42; static constexpr float g=9.5f; };...
/bla/hardware/Arduino_STM32/STM32F1/libraries/STM32ADC/src/STM32ADC.h:155:40: error: 'constexpr' needed for in-class initialization of static data member 'const float STM32ADC::_AverageSlope' of non-integral type [-fpermissive] static const float _AverageSlope = 4.3; // mV/oC //4.0...
采纳回答:C++标准只允许static constant intergral或者枚举类型的数据在类内进行初始化。 引用:C++03 9.4.2 Static data members §4 If a static data member is of const integral or const enumeration type, its declaration in the class definition can specify a constant-initializer which shall be an integ...
staticinta=11111111; ^ ~~~ 1 error generated. struct test{ const int a=1111111; }test; struct test{ }test; 同样问题:http://stackoverflow.com/questions/13662441/c11-allows-in-class-initialization-of-non-static-and-non-const-members-what-c...
Example of initialization of class's const data member in C++ Let's consider the following example/program #include <iostream>usingnamespacestd;classNumber{private:constintx;public:// const initializationNumber():x(36) {}// print functionvoiddisplay() { cout<<"x="<<x<<endl; } };intmain...
classA{private:staticinti;inta;charb;public:A() { a=0; b='#'; } A(intaa,charbb) { a=aa; b=bb; }intget_int() { cout<<a<<endl;returna; }charget_char() { cout<<b<<endl;returnb; } }; Size of the class should be sum of all the non-static data me...
1098895 _lee Errors C2327, C2065 when in-class initialization of non-static data member 1152789 108065 Compiler crash and error C1001 807634 4lg3br4 Stack overflow in recursive template with member function returning scoped enum 1135528 6XGate C6011 Not Issued for Obvious Error 1265608 ...
Warning C5246 reports missing braces during aggregate initialization of a subobject. Before Visual Studio 2022 version 17.2, the warning didn't handle the case of an anonymousstructorunion. This change is a source breaking change. It applies when the off-by-default warning C5246 is enabled. ...