In the functionmyFunction()definition,varis not static, it’s alocal/automatic variablehere and it will be declared every time of program’s execution will move the function definition; that’s why on every calling ofmyFunction(), value ofvarwill be 1. ...
这对于在C/C++或任何其他需要存储函数先前状态的应用程序中实现协程非常有用。 // C++ program to demonstrate // the use of static Static // variables in a Function #include <iostream> #include <string> using namespace std; void demo() { // static variable static int count = 0; cout << ...
(1) a static local variable defines its lifetime in the function as the entire source, but its scope remains the same as that of the automatic variable, and can only be used within the function defining the variable. After exiting the function, you cannot use it even though it still ...
changes its lifetime. Changing a global variable to a static variable changes its scope and limits its use. So the role of static this descriptor is different in different places. 4. Static function ... internal and external functions
// Since we already have a library function to handle locking, we might // as well check for this situation and throw an exception. // We use the second byte of the guard variable to remember that we’re // in the middle of an initialization. class recursive_init: public std::excepti...
Each instantiation of function template has its own copy of local static variables. For example, in the following program there are two instances: void fun(int ) and void fun(double ). So two copies of static variable i exist. 1 #include <iostream> 2 using namespace std; 3 4 template...
[tsecer@Harry localstatic]$ gcc localstatic.c -c localstatic.c:2: error: initializer element is not constant localstatic.c: In function ‘bar’: localstatic.c:5: error: initializer element is not constant [tsecer@Harry localstatic]$ g++ localstatic.c -c ...
Learn about local static variables in C language, their definition, usage, and examples to understand how they differ from regular local variables.
// being_initialized = -1 } else { while (*pOnce == being_initialized) { // Timeout can be replaced with an infinite wait when XP support is // removed or the XP-based condition variable is sophisticated enough // to guarantee all waiting threads will be woken when the variable is ...
external variable:具有外部连接的变量称为外部变量。具有外部链接的变量可以在其定义的文件中以及其他文件中使用。 比如: static int g_x; // g_x is static, and can only be used within this file。static修饰的全局变量,是内部变量,只能该文件里面使用 ...