C++类模版------STL的原理

#include<iostream>
using namespace std;
template <class T>
class compare
{
    public:
    compare(T a,T b)
    {
        x=a;y=b;
    }
    T max(){
        return (x>y)?x:y;
    }
    T min();
    private:
    T x,y;
};
template<class T>
T compare<T>::min()
{
    return (x>y)?y:x;
}
int main()
{
    compare <int>cmp(3,7);
    cout<<cmp.max();
    compare <float>cmp1(1.2,3.4);
    cout<<cmp1.min();
}