C++模板类继承

Question

#include <iostream>
using namespace std;

template <class T>
class C1
{
public:
    int n;
    C1(int a)
    {
        n=a;
    }
    T mat[50][50];
    void readmat()
    {
        int i,j;
        for(i=1; i<=n; i++)for(j=1; j<=n; j++)cin>>mat[i][j];
    }
    void showmat()
    {
        int i,j;
        for(i=1; i<=n; i++)
        {
            cout<<endl;
            for(j=1; j<=n; j++)cout<<mat[i][j]<<" ";
        }
    }
};

template <class T>
class C2: public C1<T>
{
    C2(int a): C1(a) {};

};

每当我运行它时，我都会收到错误:

In constructor C2::C2(int)':

error: class 'C2' does not have a field named 'C1'

如果有人能向我解释我做错了什么，我将不胜感激。

Answer 1

你应该将模板参数添加到基类

template <class T>
class C2: public C1<T>
{
    C2(int a): C1<T>(a) {};

};