错误：用构造函数中的指针重新定义多态类

Question

我正在尝试在C ++中进行战舰游戏，并且我正在使用多态性的三个CPU级别进行编码，Targetet Board对象作为指针作为构造函数传递，直到我尝试制作一个驾驶的类和驾驶类和我一直收到此错误：

error: redefinition of 'cpu_medium::cpu_medium(board&)'

cpu_battleships.h的样本：

#ifndef CPU_BATTLESHIPS_H
#define CPU_BATTLESHIPS_H
#include "board.h"

class cpu_easy
{
    public:
        cpu_easy(board &e);
        virtual ~cpu_easy();
    protected:
        board* enemy;

};
class cpu_medium : public cpu_easy
{
    public:
        cpu_medium(board &e):cpu_easy(e){};
};

#endif // CPU_BATTLESHIPS_H

cpu_battleships.cpp的样本

#include "cpu_battleships.h"
#include "board.h"
#include <cstdlib>

using namespace std;

cpu_easy::cpu_easy(board &e)
{
    enemy=&e;
}
cpu_medium::cpu_medium(board &e):cpu_easy(e){}
{

}

Answer 1

您定义cpu_medium :: cpu_medium（董事会＆amp; e）两次，正如错误消息所说。

在cpu_battleships.h中，更改

cpu_medium(board &e):cpu_easy(e){};

为

cpu_medium(board &e);

cppu_battleships.cpp中的构造函数。