C++普通类从模板类派生

#include<iostream> using namespace std; /*欲得到模板类,就必须定义一个类模板,然后从才能从类模板按需求实例化出某个模板类*/ template<class T> class A { T v1; public: void print() { cout << "v1=" << v1 << endl; } }; /*普通类B 从 模板类A<int> 派生*/ class B :public A<int>//模板类A<int> { int a; public: B(int a_ = 0) :a(a_) { cout << "constructor was called !" << endl; } void set(int a_) { a = a_; } void print() { cout << "a=" << a << endl; } }; int main() { B obj(5); obj.print(); obj.set(7); obj.print(); }