是否将extern变量初始化为其默认值? [英] are extern variables initialized to their default value?

问题描述

我知道，如果char数组是全局或静态局部，其元素将初始化为\ 0，但是如果char数组是extern变量怎么办?

I know that if a char array is a global or a static local, its elements get initialized to \0's, but what if the char array is an extern variable?

推荐答案

如果变量被声明为extern但不是全局变量，则它也将接受相同的初始化处理.例如

If the variable was declared as extern but is nonglobal, it too receives the same initialization handling. For instance

namespace A { extern int x; int x;}

此非全局变量将初始化为零.所有名称空间作用域变量都接受此处理.

This nonglobal variable will be initialized to zero. All namespace scope variables receive this handling.

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