What is a Static Function? Static functions in C++ are defined using the static keyword. When a member function is declared static, it can be called on the class itself, not on instances of the class. This feat
编译出错:error C2597: illegal reference to data member ‘Point::m_x’ in a static member function 因为静态成员函数属于整个类,在类实例化对象之前就已经分配空间了,而类的非静态成员必须在类实例化对象后才有内存空间,所以这个调用就出错了,就好比没有声明一个变量却提前使用它一样。 结论3: 静态成员函数...
即可以在inline function中定义静态对象(或引用静态对象).实例
cpp: In static member function‘static void CBOOK::cbookfunction()’: staticnumbers.cpp:31:22: error: cannot call member function‘void CBOOK::function()’ without object function(); 静态成员变量在静态成员函数或者非静态成员函数都可以访问 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #...
Here is the following example for the static member function:Open Compiler #include <iostream> using namespace std; class MyClass { public: static void displayMessage() { cout << "Hello, World!"; } }; int main() { // Calling static member function MyClass::displayMessage(); return 0...
Finally, function-local statics will be initialized the first time execution "reaches" the line where they are declared. All static variables all destroyed in the reverse order of initialization. 全局作用域的static 变量在本翻译单元任何函数执行前初始化 函数(局部)作用域的 static 变量在程序首次执行到...
cout << "func_a_value => " << func_a_value << ", current function = > " << __FUNCTION__ << endl; } void func_b(int a, int b) { static int res = a + b; cout << "res => " << res << ", current thread id => " << std:...
Global variable:文件作用域:可以加上extern声明为外部变量,跨文件作用域(这里指的是把这些变量定义在.cpp文件中) static (Global) Function:有文件作用域,只在本文件中使用 Global Function:无文件作用域 static Member (in Function) variable:函数调用完成后,变量保存状态,再次调用函数,不会重新分配空间 ...
Global variable:文件作用域:可以加上extern声明为外部变量,跨文件作用域(这里指的是把这些变量定义在.cpp文件中) static (Global) Function:有文件作用域,只在本文件中使用 Global Function:无文件作用域 static Member (in Function) variable:函数调用完成后,变量保存状态,再次调用函数,不会重新分配空间 ...
ID: cpp/unused-static-function Kind: problem Security severity: Severity: recommendation Precision: high Tags: - efficiency - useless-code - external/cwe/cwe-561 Query suites: - cpp-security-and-quality.qls Click to see the query in the CodeQL repository ...