模板特化

模板的特化:
對某些類型進行特殊處理,下面是函數模板特化的一個例子:

template<class T>
bool IsEqual(T t1,T t2)
{
	return t1==t2;
}

template<>
bool IsEqual(char* t1,char* t2)//IsEqual函數模板需要對char* 類型盡情特殊處理
{
	return strcmp(t1,t2)==0;
}

類模板實現特化的原因和函數模板實現特化的原因相同.


類模板應用的一個例子:

template<class T1,class T2>
class Point_T
{
public:
	T1 a;
	T2 b;
	Point_T():a(0),b(0){}
	Point_T(T1 ta,T2 tb):a(ta),b(tb){}
	Point_T<T1,T2>& operator=(Point_T<T1,T2> &pt);//賦值函數
	friend Point_T<T1,T2>operator+(Point_T<T1,T2> &pt1,Point_T<T1,T2> &pt2);//重載
};

template<class T1,class T2>
Point_T<T1,T2>& Point_T<T1,T2>::operator=(Point_T<T1,T2> &pt)//賦值函數
{
	this->a = pt.a;
	this->b = pt.b;
	return *this;
}

template<class T1,class T2>
Point_T<T1,T2> operator+(Point_T<T1,T2> &pt1,Point_T<T1,T2> &pt2)
{
	Point_T<T1,T2> temp;
	temp.a = pt1.a + pt2.a;
	temp.b = pt1.b + pt2.b;
	return temp;
}

template<class T1,class T2>
ostream& operator<<(ostream& out,Point_T<T1,T2>& pt)
{
	out << "(" << pt.a << ",";
	out << pt.b << ")";
	return out;
}