print out a palindromic stack implemented by template meta programming XD

PalindromicStack.cpp

#include <iostream>
#include <string>
#include <iomanip>

using namespace std;

template<size_t max> string inc_seq()
{
	string s;
	for(int i=1; i<=max; i++)
		s += '0'+i;
	return s;
}
template<> string inc_seq<1>() { return string("1"); }

template<size_t max> string dec_seq()
{
	string s;
	for(int i=max; i>=1; i--)
		s += '0'+i;
	return s;
}
template<> string dec_seq<1>() { return string("1"); }

template<size_t level> void PalindromicStack(size_t center = level)
{
	PalindromicStack<level-1>(center);
	cout << setw(center) << inc_seq<level>() << dec_seq<level-1>() << endl;
	//cout << setw(center) << Seq<level>::inc << Seq<level-1>::dec << endl;
}
template<> void PalindromicStack<1>(size_t center)
{
	cout << setw(center) << 1 << endl;
}

int main(int argc, const char *argv[])
{
	PalindromicStack<5>();
	return 0;
}