想问这个错误是怎么回事，我在网上搜到，麻烦了，能解决一定采纳，谢谢！

Question

#include

using namespace std;

class Game
{
private:
int die1；
int die2;
int tzs;
public:
int RollDice(); //函数原型 //抛骰子函数

void PlayGame(); //进行一次游戏

void GetHelp();//游戏帮助

};

enum GameStatus{WIN,LOSE,PLAYING}; //枚举游戏状态;

int RollDice() //抛骰子函数
{
int die1 = 1 + rand() % 6;
int die2 = 1 + rand() % 6;
int tzs = die1 + die2;
cout << "Player rooled " << die1 << "+" << die2 << "=" << tzs << endl;
return tzs;
}

void Game::PlayGame()
{
int a;
cout<<"输入任何数字开始游戏"< cin>>a;
int tzs,first;
int GameStatus;
tzs=RollDice();
switch(tzs){
case 7:
case 11:
GameStatus = WIN;
break;
case 2:
case 3:
case 12:
GameStatus = LOSE;
break;
default:
GameStatus = PLAYING;
first=tzs;
break;
}
while(GameStatus==PLAYING)
{
tzs=RollDice();
if (tzs=first)
GameStatus=WIN;

    else if (tzs=7)
        GameStatus=LOSE;

}

if (GameStatus==WIN)
cout<<"你赢啦"<<endl;
else if(GameStatus==LOSE)
cout<<"很遗憾你输了"<<endl;

char j;
    char y;
cout<<"想继续玩此游戏吗？ 输入'y'或'Y'则继续，输入其他字符则退出游戏。"<<endl;
cin>>y;
while(y=='y'||'Y')
{
    if(y=='y')
    {  
        cout<<"输入任意字符游戏开始"<<endl;
        cin>>j;
        cout<<"游戏开始\n\n\n\n";
     Game::PlayGame();
    }
    break;
}

}

void Game::GetHelp(){

  cout<<endl

      <<"    比赛规则：每人初始积分为100分，从1号开始掷骰子，骰子出现后,"
      <<"根据点数减去掷骰人的相应积分， 如 减去 10*（6-点数），然后"
      <<"根据点数多少，就依次向后数掷骰的点数同等数量的人，被数到的"
      <<"被数到的最后一个人继续掷骰子，计算积分，依此类推。"
      <<"如果某人掷骰子后，其积分小于等于0则出列，余下的人继续按照此法进行游戏，直到剩下最后一个人，为胜利者。"
      <<endl<<endl<<endl;

}

int main()
{

cout<<endl
    <<"                            **************************************************\n\n"
    <<"                                           欢迎进入掷骰子游戏\n\n"
    <<"                            **************************************************\n\n"
    <<endl<<endl<<endl;
int o;

cout<<"                                          ------------------------"<<endl;
cout<<"                                          |亲输入你要选择的项目  |"<<endl;
cout<<"                                          |1.玩一手游戏          |"<<endl;
cout<<"                                          |2.查看帮助            |"<<endl;
cout<<"                                          |3.退出游戏            |"<<endl;
cout<<"                                          ------------------------"<<endl;

cin>>o;
switch(o)
{
case 1:


    char j;
    cout<<"                                          输入任意字符游戏开始"<<endl;
    cin>>j;
    cout<<"                                          游戏开始\n\n\n\n";
    Game obj;
    obj.PlayGame();
    break;
case 2:
    obj.GetHelp();
    break;
case 3:
    break;
default:
    cout<<"                                          对不起你输入的不在范围内"<<endl;
    break;
}
return 0;

}

错误是这样的：
1>zzh.obj : error LNK2019: 无法解析的外部符号 "public: int __thiscall Game::RollDice(void)" (?RollDice@Game@@QAEHXZ)，该符号在函数 "public: void __thiscall Game::PlayGame(void)" (?PlayGame@Game@@QAEXXZ) 中被引用

1>C:\Users\11350\documents\visual studio 2010\Projects\111\Debug\111.exe : fatal error LNK1120: 1 个无法解析的外部命令

Answer 1

编通了，能不能用你试一下：

#include <iostream>
using namespace std;

class Game
{
private:
    int die1;
        int die2;
    int tzs;
public:
    int RollDice(); //函数原型 //抛骰子函数

    void PlayGame(); //进行一次游戏

    void GetHelp();//游戏帮助

};

enum GameStatus{ WIN, LOSE, PLAYING }; //枚举游戏状态;

int Game::RollDice() //抛骰子函数
{
    int die1 = 1 + rand() % 6;
    int die2 = 1 + rand() % 6;
    int tzs = die1 + die2;
    cout << "Player rooled " << die1 << "+" << die2 << "=" << tzs << endl;
    return tzs;
}

void Game::PlayGame()
{
    int a;
    cout << "输入任何数字开始游戏:";
    cin >> a;
    int tzs, first;
    int GameStatus;
    tzs = RollDice();
    switch (tzs){
    case 7:
    case 11:
        GameStatus = WIN;
        break;
    case 2:
    case 3:
    case 12:
        GameStatus = LOSE;
        break;
    default:
        GameStatus = PLAYING;
        first = tzs;
        break;
    }
    while (GameStatus == PLAYING)
    {
        tzs = RollDice();
        if (tzs = first)
            GameStatus = WIN;

        else if (tzs = 7)
            GameStatus = LOSE;
    }

    if (GameStatus == WIN)
        cout << "你赢啦" << endl;
    else if (GameStatus == LOSE)
        cout << "很遗憾你输了" << endl;

    char j;
    char y;
    cout << "想继续玩此游戏吗？ 输入'y'或'Y'则继续，输入其他字符则退出游戏。" << endl;
    cin >> y;
    while (y == 'y' || 'Y')
    {
        if (y == 'y')
        {
            cout << "输入任意字符游戏开始" << endl;
            cin >> j;
            cout << "游戏开始\n\n\n\n";
            Game::PlayGame();
        }
        break;
    }
}

void Game::GetHelp(){

    cout << endl

        << "    比赛规则：每人初始积分为100分，从1号开始掷骰子，骰子出现后,"
        << "根据点数减去掷骰人的相应积分， 如 减去 10*（6-点数），然后"
        << "根据点数多少，就依次向后数掷骰的点数同等数量的人，被数到的"
        << "被数到的最后一个人继续掷骰子，计算积分，依此类推。"
        << "如果某人掷骰子后，其积分小于等于0则出列，余下的人继续按照此法进行游戏，直到剩下最后一个人，为胜利者。"
        << endl << endl << endl;
}

int main()
{

    cout << endl
        << "                            **************************************************\n\n"
        << "                                           欢迎进入掷骰子游戏\n\n"
        << "                            **************************************************\n\n"
        << endl << endl << endl;
    int o;

    cout << "                                          ------------------------" << endl;
    cout << "                                          |亲输入你要选择的项目  |" << endl;
    cout << "                                          |1.玩一手游戏          |" << endl;
    cout << "                                          |2.查看帮助            |" << endl;
    cout << "                                          |3.退出游戏            |" << endl;
    cout << "                                          ------------------------" << endl;

    cin >> o;
    switch (o)
    {
    case 1:


        char j;
        cout << "                                          输入任意字符游戏开始" << endl;
        cin >> j;
        cout << "                                          游戏开始\n\n\n\n";
        Game obj;
        obj.PlayGame();
        break;
    case 2:
        obj.GetHelp();
        break;
    case 3:
        break;
    default:
        cout << "                                          对不起你输入的不在范围内" << endl;
        break;
    }
    return 0;
}