类模板继承模板类（P346_2）

#include<iostream>
#include<string>
using namespace std;
template<class T>
class TBase
{
T data1;
public:
void print()
{
cout<<"TBase::"<<data1<<endl;
}
};
template<class T2>
class TDerived : public TBase<int>
{
T2 data2;
public:
void print()
{
TBase<int>::print();
cout<<"TDerived::"<<data2<<endl;
}
};
int main()
{
TDerived<int>d;
d.print();
TDerived<string>d2;
d2.print();
return 0;
}