#include<stdio.h>
#include<iostream>

using namespace std;

class cna_MO
{
  public:
    virtual void print()
    {
        cout << "cna_MO" << endl;
    }
};

class cna_bsc:public cna_MO
{
  public:
    void print()
    {
        cna_MO::print();
    }

    void print(int a)
    {
        cout << "cna_BSC" << endl;
    }
};

class cna_Mo
{
    cna_MO *_mo;

  public:
    cna_Mo()
    {
        _mo = new cna_bsc;
    }

    virtual void print(int a)
    {
        cout << "cna_Mo with arg" << endl;
        _mo->print(5);
    }

    virtual void print()
    {
        cout << "cna_Mo" << endl;
        _mo->print();
    }
};

int main()
{
    cna_Mo valid_mo;
    cout << "old case is started" << endl;
    valid_mo.print();
    cout << "new case is started" << endl;
    valid_mo.print(5);
    return 0;
}

我在这里做的是我已经重载了一个虚拟函数在父类中的子类！这不是正确的事吗？

我收到的编译错误如下：

“temp10.cc”,line 45: Error: Too many arguments in call to “cna_MO::print()”.