函数内Static初始化的用法

最新推荐文章于 2023-10-31 23:04:55 发布

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#constructor #object #iostream #c

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本文通过一个C++示例程序演示了不同作用域下静态对象与局部对象的构造及析构顺序，并展示了如何通过将对象声明为static来控制初始化和清理过程。

如果想第一次使用的时候再初始化，而程序正常退出的时候，再释放资源。那么应该将其放到某个函数中，作为static声明。

#include "Object.h"
#include "Container.h"
#include <iostream>

using namespace std;

static Object sglobal(" static global");
Object global(" global");

void func()
{
cout << " In func()" << endl;
Container cc;
cout << " Out func()" << endl;
}

void func2()
{
cout << " In func2()" << endl;
Container cc;
cout << " Out func2()" << endl;
}

int main()
{
cout << "main() begin." << endl;
Object local(" local");
func();
func2();
//Container cc;
cout << "main() end." << endl;
return 0;
}

输出是：

C:/Project/CPP/LearnCpp/debug>InitializationOrder.exe
static global initializing...
global initializing...
object in container initializing...
global in container initializing...
static global in container initializing...
main() begin.
local initializing...
In func()
Static In Container Constructor initializing...
In Container Constructor initializing...
Initializing Container ...
In Container Constructor releasing...
Out func()
Releasing Container ...
In func2()
In Container Constructor initializing...
Initializing Container ...
In Container Constructor releasing...
Out func2()
Releasing Container ...
main() end.
local releasing...
Static In Container Constructor releasing...
static global in container releasing...
global in container releasing...
object in container releasing...
global releasing...
static global releasing...