重载

 

//error 函数模板不能有模板默认值，类模板可以
template <typename T = int>
void print(int i)
{
	cout<<i<<endl;
}

 

//模板形参T没有作为类型在模板函数的形参表中出现，因此将无法对其进行模板实参推断
template <typename T>
T pp()
{
	T a(1);
	cout<<"hello"<<endl;
	return a;
}

int _tmain(int argc, _TCHAR* argv[])
{
	pp();
}

 

template <typename T>
typename T::value_type mostFre(T first,T last)
{
	std::size_t amount = 0;
	T start =first;
	while (start != last)
	{
		++amount;
		start++;
	}

	typename std::vector<typename T::value_type> VecType;
	VecType vec(amount);

	VecType::iterator newFirst = vec.begin();
	VecType::iterator newLast = vec.end();

	std::uninitialized_copy(first,last,newFirst);
	std::sort(newFirst,newLast);
	std::size_t maxOccu = 0,occu = 0;
	VecType::iterator preIter = newFirst;
	VecType::iterator maxOccuElement = newFirst;

	while (newFirst != newLast)
	{
		if (*newFirst != *preIter)
		{
			if (occu > maxOccu)
			{
				maxOccu = occu;
				maxOccuElement = preIter;
			}
			occu = 0;
		}
		++occu;
		preIter = newFirst;
		++newFirst;
	}

	if (occu > maxOccu)
	{
		maxOccu = occu;
		maxOccuElement = preIter;
	}

	return *maxOccuElement;
}