c++ - 错误 : 'template class Two' used without template parameters

Question

嘿，所以我正在尝试编译:

//ASSIGNMENT
#include <iostream>
#include <string>

using namespace std;

template <class T>
class Two { 

    private: T x,y;
    public: 

        Two (T a, T b); 
        friend void Show (Two p);
        ~Two();

};
//ASSIGNMENT


template <class T>
Two::Two (T a, T b){
    x = a;
    y = b;
}

friend void Two::Show(Two p){
    cout << p.x << " and " << p.y << endl;
}

int main () {
    Two<int> class2(2,3);
    Show(class2);
}

赋值是定义类的成员(在//ASSIGNMENT 标签中)。我不知道为什么它不会编译...谢谢!

Answer 1

改变

template <class T>
Two::Two (T a, T b)

到

template <class T>
Two<T>::Two (T a, T b)

并在需要的地方进行类似的更改。