c++hash関数

std::hash
template struct hash;
Unary function object class that defines the default hash function used by the standard library.
いちじげんかんすう
Member functions
operator()
Returns a hash value for its argument, as a value of type  size_t.

#include 
#include 
#include 
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	char nts1[] = "Test";
	char nts2[] = "Test";
	string str1 (nts1);
	string str2 (nts2);

	hash ptr_hash;
	hash str_hash;

	cout<	cout<	cout<	cout<	cout << "same hashes:
" << boolalpha;
	cout << "nts1 and nts2: " << (ptr_hash(nts1)==ptr_hash(nts2)) << '
';
	cout << "str1 and str2: " << (str_hash(str1)==str_hash(str2)) << '
';

	return 0;
}

   ：

hash value of nts1: 2071187971
hash value of nts2: 1344341107
hash value of str1: 805092869
hash value of str2: 805092869
same hashes:
nts1 and nts2: false
str1 and str2: true