关于const字符串数组存储一个奇怪的现象

以下代码的作用是返回数组中最大值（如果是字符串数组则返回数组中最长的那个字符串，如果有几个等长字符串最长，则返回其中第一个的地址）

// ex6, ch 8

#include <iostream>

#include <cstring>



template <typename T>

T ret_max(T [], int);



template <> char * ret_max(char *[], int);



int main()

{

	using namespace std;

	int ar_int[6] = {3, 7, 2, 5, 6, 4};

	double ar_doub[4] = {2.1, 3.4, 1.8, 4.2};

	char * str[5] = {

		"I really can't understand you.",

		"You're my dearest baby.",

		"How much do you love me?",

		"I really can't understand you.",

		"I really can't understand you."

	};

	char * s;



	cout << "Max of the six integers: " << ret_max(ar_int, 6) << endl;;

	cout << "Max of the four integers: " << ret_max(ar_doub, 4) << endl;

	cout << "The five strings and their addresses:" << endl;

	for (int i = 0; i < 5; i++)

	{

		cout << str[i] << endl;

		cout << (unsigned)str[i] << endl;

	}

	cout << "The largest of the five and its address:" << endl;

	s = ret_max(str, 5);

	cout << s << endl;

	cout << (unsigned)s << endl;   // 用unsigned打印指针内容，请还有其他打印法可以显示0x进制的模式吗？



	return 0;

}



template <typename T>

T ret_max(T ar[], int n)

{

	T max = ar[0];

	for(int i = 0; i < n; i++)

		if(max < ar[i])

			max = ar[i];

	return max;

}



template <> char * ret_max(char * str[], int n)

{

	int i, max = 0;



	for(i = 0; i < n; i++)

		if(strlen(str[max]) < strlen(str[i]))

			max = i;



	return str[max];

}

运行结果：
Max of the six integers: 7
Max of the four integers: 4.2
The five strings and their addresses:
I really can't understand you.
4214892 // 这些长度一致的数组，竟然地址一样！
You're my dearest baby.
4214923
How much do you love me?
4214947
I really can't understand you.
4214892 // 同上
I really can't understand you.
4214892 // 同上
The largest of the five and its address:
I really can't understand you.
4214892