voidfoo(){staticintlocal_static_var=[](){std::cout<<"Initializing local static variable"<<std::endl;return42;}();// some logic} 这里local_static_var的初始化要等到foo()被调用时才会执行,即使动态库已经加载。3. 静态变量的两阶段初始化 你提到
定义在函数内部的变量称为局部变量(Local Variable),它的作用域仅限于函数内部, 离开该函数后就是无效的,生命周期直接结束,再使用就会报错。 而使用 static 修饰的局部静态变量,它的作用域仅限于函数内部, 离开该函数后就是无效的,**生命周期**直到程序结束,举个栗子: /***/ //@Author:猿说编程 //@Blog(...
1、static变量存放在静态存储区,在程序整个运行期间都不释放;而auto变量存放在动态存储区,随着生命周期的结束而立即释放。2、static变量只赋值一次,以后就不用赋值;而auto变量在函数每调用一次都要赋初值。3、如果用户不对static变量赋初值,则默认为0或'\0';而auto变量为不确定值。
); return 0; } int main() { func(); printf("www.codersrc.com"); return 0; } /* 输出:静态函数www.codersrc.com */ 二.static 修饰变量 1.static 局部静态变量 定义在函数内部的变量称为局部变量(Local Variable),它的作用域仅限于函数内部, 离开该函数后就是无效的,生命周期直接结束,...
(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 ...
void static_local_variable() { static int count = 0; count++; } 第一次进入此函数,静态变量count被初始化为0(若不初始化,系统会自动初始化为0),接下来执行count++。 而之后调用此函数则只执行count++. 此函数与以下代码实现同样的功能: int count = 0; ...
Using thestatickeyword on a local variable changes its duration from automatic duration to static duration. This means the variable is now created at the start of the program, and destroyed at the end of the program (just like a global variable). As a result, the static variable will retain...
type of variable, a so-called static local variable. This variable keeps its value even after the method ends. The next time you call this method, the variable isn’t created anew but the existing one is used. You still can’t use the variable outside of ...
++c;// Outputs 14cout<< c; } Output 13 14 In the above program,cis a global variable. This variable is visible to both functionsmain()andtest()in the above program. Static Local variable Keywordstaticis used for specifying a static variable. For example: ...
定义在函数内部的变量称为局部变量(Local Variable),它的作用域仅限于函数内部, 离开该函数后就是无效的,生命周期直接结束,再使用就会报错。 而使用 static 修饰的局部静态变量,它的作用域仅限于函数内部, 离开该函数后就是无效的,**生命周期**直到程序结束,举个栗...