什么是用C或C ++中的静态块？ [英] What is static block in c or c++?

问题描述

我想知道什么是静态块C或C ++用一个例子？我知道什么是静态的，而是什么是静态和静态块之间的区别？

I want to know that what is static block in c or c++ with an example? I know what is static but what is the difference between static and static block?

推荐答案

另一种方法是，你可能会寻找一个静态的比喻
阻止Java的。应用程序加载时运行code块。
在C中没有这样的事情++，但它可以通过使用一个构造函数被伪造
静态对象。

Another alternative is that you might be looking for the analogy of a static block in Java. A block of code that is run when the application is loaded. There is no such thing in C++ but it can be faked by using the constructor of a static object.

foo.cpp:

struct StaticBlock {
    StaticBlock(){
        cout << "hello" << endl;
    }
}


static StaticBlock staticBlock;

void main(int, char * args[]){

}

但是。我通过这之前，因为它是℃的微妙的边缘的情况下被咬伤++
标准。如果静态对象不是由主被叫任何code可达
静态对象的构造可以或可以不被调用。

HOWEVER. I've been bitten by this before as it's a subtle edge case of the C++ standard. If the static object is not reachable by any code called by main the constructor of the static object may or may not be called.

我发现用gcc你好将获得输出，并与Visual Studio它会
没有。

I found that with gcc hello will get output and with visual studio it will not.

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