我有关于在命名空间中初始化变量的问题

问题描述

#include <iostream>

using namespace std;

namespace AAA
{
	namespace BBB
	{
		namespace CCC
		{
			int num1, num2;
		}
	}
}

int main()
{
	namespace ABC = AAA::BBB::CCC;
	cout << ABC::num1 << ABC::num2 << endl;
	return 0;
}

我的尝试：



如您所见，我没有在命名空间AAA :: BBB :: CCC中初始化变量num1，num2。在正常情况下，num1和num2应该有垃圾值是正确的，但我确认编译后它们都是0。为什么？

What I have tried:

As you see, I didn't initialize variable num1, num2 in namespace AAA::BBB::CCC. In the normal case, It is correct that num1 and num2 should have garbage values, but I have confirmed that both were 0 after compilation. Why?

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