C++ C++;为什么这个派生类会出错
对于我的tic tac toe游戏,我有一个基本类玩家和两个派生类HumanPlayer和AIPlayer。当我第一次创建类时,我在一个.h文件中编写了HumanPlayer类。现在,由于我已经分离了实现和头文件,我在devc++中遇到了一个错误:“在“{”标记之前应该有类名” 我似乎找不到问题所在 这是HumanPlayer类和基本类的玩家。也许有人能发现问题。 Player.h HumanPlayer.hC++ C++;为什么这个派生类会出错,c++,C++,对于我的tic tac toe游戏,我有一个基本类玩家和两个派生类HumanPlayer和AIPlayer。当我第一次创建类时,我在一个.h文件中编写了HumanPlayer类。现在,由于我已经分离了实现和头文件,我在devc++中遇到了一个错误:“在“{”标记之前应该有类名” 我似乎找不到问题所在 这是HumanPlayer类和基本类的玩家。也许有人能发现问题。 Player.h HumanPlayer.h #pragma once // include guard #include "Boa
#pragma once // include guard
#include "Board.h"
class HumanPlayer: public Player
{
public:
HumanPlayer(char token);
virtual void makeAMove(Board &myBoard);
private:
char token;
int askForRow();
int askForColumn();
};
HumanPlayer.cpp
#include "HumanPlayer.h"
#include <cstdlib> // atoi
HumanPlayer::HumanPlayer(char token)
{
this->token = token;
}
void HumanPlayer::makeAMove(Board &myBoard)
{
bool done = false;
do
{
int row = askForRow();
int column = askForColumn();
if (myBoard.getCell(row, column) == ' ')
{
myBoard.setCell(row, column, token);
done = true;
}
else
std::cout << "This cell is already occupied. Try a different cell" << std::endl;
}
while (!done);
}
int HumanPlayer::askForRow()
{
while(true)
{
std::cout << "Enter a row (0, 1, 2) for player " << token << ": ";
std::string row_s;
std::getline(std::cin, row_s);
if (row_s == "0" || row_s == "1" || row_s == "2")
{
return atoi(row_s.c_str());
}
else
{
std::cout << "\nInvalid input\n";
}
}
}
int HumanPlayer::askForColumn()
{
while(true)
{
std::cout << "Enter a column (0, 1, 2) for player " << token << ": ";
std::string column_s;
std::getline(std::cin, column_s);
if (column_s == "0" || column_s == "1" || column_s == "2")
{
return atoi(column_s.c_str());
}
else
{
std::cout << "\nInvalid input\n";
}
}
}
#包括“HumanPlayer.h”
#包括//atoi
HumanPlayer::HumanPlayer(字符令牌)
{
此->令牌=令牌;
}
void HumanPlayer::makeAMove(Board和myBoard)
{
bool done=false;
做
{
int row=askForRow();
int column=askForColumn();
if(myBoard.getCell(行、列)='')
{
设置单元(行、列、令牌);
完成=正确;
}
其他的
std::cout我看不到标题HumanPlayer.h在哪里包括类Player的定义。董事会标题是否包括其中任何一个?这两个标题都只需要一个董事会的前向声明。它们都不需要完整的定义。HumanPlayer如何获得Player的定义?好的。我在HumanPl中包括Player.h现在它可以编译了。当我只有HumanPlayer.h文件而没有HumanPlayer.cpp时,没有必要包含这个文件。谢谢你的帮助。
#include "HumanPlayer.h"
#include <cstdlib> // atoi
HumanPlayer::HumanPlayer(char token)
{
this->token = token;
}
void HumanPlayer::makeAMove(Board &myBoard)
{
bool done = false;
do
{
int row = askForRow();
int column = askForColumn();
if (myBoard.getCell(row, column) == ' ')
{
myBoard.setCell(row, column, token);
done = true;
}
else
std::cout << "This cell is already occupied. Try a different cell" << std::endl;
}
while (!done);
}
int HumanPlayer::askForRow()
{
while(true)
{
std::cout << "Enter a row (0, 1, 2) for player " << token << ": ";
std::string row_s;
std::getline(std::cin, row_s);
if (row_s == "0" || row_s == "1" || row_s == "2")
{
return atoi(row_s.c_str());
}
else
{
std::cout << "\nInvalid input\n";
}
}
}
int HumanPlayer::askForColumn()
{
while(true)
{
std::cout << "Enter a column (0, 1, 2) for player " << token << ": ";
std::string column_s;
std::getline(std::cin, column_s);
if (column_s == "0" || column_s == "1" || column_s == "2")
{
return atoi(column_s.c_str());
}
else
{
std::cout << "\nInvalid input\n";
}
}
}