c++ - Tic Tac Toe 预期主要表达之前

Question

我现在正在学习 C++，我的任务是创建一个 tic tac toe 游戏，该游戏读取 .txt 文件的 Action ，看起来像这样:2 31 32 23 2等等

所以这是我构建的代码:

#include <iostream>
#include <fstream>
using namespace std;

char my_board[3][3]{0,0,0,
                    0,0,0,
                    0,0,0,};


int i = 0, j = 0;
int line = 0;
int X = 0, O = 0, N = 0;

void loadSquaresFromStream(int my_board[3][3], int i, int j);
void getgameStatus (int X, int O, int N, int i, int j, int my_board[3][3]);
void displayTotals(int X, int O, int N);

int main(){


  cout << loadSquaresFromStream(int my_board[3][3], int i, int j) << endl;


return 0;
}

void loadSquaresFromStream(int my_board[3][3], int i, int j){
 ifstream inputStream;
   inputStream.open("games.txt");
//take all numbers from txt and input into an array
   int moves[] = inputStream;
   for (moves[i] != 0 && moves[j] != 0 ){
    switch(line){
      case %2:
        my_board[i][j] = x;
        i++; j++;
        break;
      case %1:
        my_board[i][j] = o;
        i++; j++;
        break;
    }
   }
   else if ((moves[i] == 0) && (moves[j] == 0)){
    cout << getgameStatus(X, O, N, i,j, my_board[3][3]) << endl;
   }
   else{
    cout << displayTotals(X, O, N) << endl;
   }
}

void getgameStatus (int X, int O, int N, int i, int j, int my_board[3][3]){
  if (my_board[1][1] == x && my_board[1][2] == x && my_board[1][3] == x){ //All possible games where x wins
    cout << "x wins" << endl;
    X++;
  }
  else if (my_board[2][1] == x && my_board[2][2] == x && my_board[2][3] == x){
    cout << "x wins" << endl;
    X++;
  }
  else if (my_board[3][1] == x && my_board[3][2] == x && my_board[3][3] == x){
    cout << "x wins" << endl;
    X++;
  }
  else if (my_board[1][1] == x && my_board[2][1] == x && my_board[3][1] == x){
    cout << "x wins" << endl;
    X++;
  }if (my_board[1][1] == x && my_board[1][2] == x && my_board[1][3] == x){
    cout << "x wins" << endl;
    X++;
  }
  else if (my_board[2][1] == x && my_board[2][2] == x && my_board[2][3] == x){
    cout << "x wins" << endl;
    X++;
  }
  else if (my_board[3][1] == x && my_board[3][2] == x && my_board[3][3] == x){
    cout << "x wins" << endl;
    X++;
  }
  else if (my_board[1][1] == x && my_board[2][1] == x && my_board[3][1] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][2] == x && my_board[2][2] == x && my_board[3][2] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][3] == x && my_board[2][3] == x && my_board[3][3] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][1] == x && my_board[2][2] == x && my_board[3][3] == x){cout << "Total games won by x: " << X << endl;

}
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][3] == x && my_board[2][2] == x && my_board[3][1] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][2] == x && my_board[2][2] == x && my_board[3][2] == x){
    cout << "x wins" << endl;
    X++;
  }void displayTotals(X, O, N)
    else if (my_board[1][3] == x && my_board[2][3] == x && my_board[3][3] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][1] == x && my_board[2][2] == x && my_board[3][3] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][3] == x && my_board[2][2] == x && my_board[3][1] == x){
    cout << "x wins" << endl;
    X++;
  }
    else if (my_board[1][1] == o && my_board[1][2] == o && my_board[1][3] == o){ //All possible games where o wins
    cout << "o wins" << endl;
    O++;
  }
    else if (my_board[2][1] == o && my_board[2][2] == o && my_board[2][3] == o){
    cout << "o wins" << endl;
    O++;
  }displayTotals(X, O, N)
    else if (my_board[3][1] == o && my_board[3][2] == o && my_board[3][3] == o){
    cout << "o wins" << endl;
    O++;
  }
    else if (my_board[1][1] == o && my_board[2][1] == o && my_board[3][1] == o){
    cout << "o wins" << endl;
    O++;cout << "Total games won by x: " << X << endl;

}
  }
    else if (my_board[1][2] == o && my_board[2][2] == o && my_board[3][2] == o){
    cout << "o wins" << endl;
    O++;
  }
    else if (my_board[1][3] == o && my_board[2][3] == o && my_board[3][3] == o){
    cout << "o wins" << endl;
    O++;
  }
    else if (my_board[1][1] == o && my_board[2][2] == o && my_board[3][3] == o){
    cout << "o wins" << endl;
    O++;
  }
    else if (my_board[1][3] == o && my_board[2][2] == o && my_board[3][1] == o){
    cout << "o wins" << endl;
    O++;
  }

    else{
    cout << "game incomplete" << endl; //All incomplete games
    N++;
  }
}

void displayTotals(int X, int O, int N){
  cout << "Total games won by x: " << X << endl;
  cout << "Total games won by o: " << O << endl;
  cout << "Total games incomplete: " << N << endl;

}

我有几个相同的“预期的主表达式之前......”错误。我不知道是什么原因造成的。我是新手，很抱歉，如果它很冗长。感谢你们提供的任何帮助。

Answer 1

好的，您发布的代码有几处错误。

对于初学者，您应该知道 C++ 是一种区分大小写的语言。您在多个地方完成了以下操作:

if (my_board[1][1] == x && my_board[1][2] == x && my_board[1][3] == x)

问题是您的变量被命名为 X 和 O 而不是 x 和 o。改变那些。

您还尝试流式传输具有 void 返回类型的函数的返回值。你根本不能那样做。 void 顾名思义什么都不是，因此您试图将任何内容流式传输到控制台。

对于您的 switch 语句，您写道:

case %2:

那简直是无效的。我不确定您在那里尝试做什么，所以我无法真正为您指明正确的方向。

最后我注意到您有与函数参数具有相同名称和类型的全局变量。两者兼得真的没有意义。要么你有全局变量以避免传递它们(这不是好的做法，不要那样做)或者你有函数参数；不要两者都做。