Valgrind错误-地址0x0没有被堆栈分配或释放

Question

我正在尝试根据主线参数中声明的列和行数分配内存。例如a.out 2 4 6意味着要用2名玩家，4列，6行进行a.out比赛。

我期望通过board_init函数分配内存，但是valgrind返回：user_input_players（int，char **）]上的读取大小无效1

我只熟悉new和delete命令。我不确定如何理解错误消息。

// function declaration
int user_input_players(int choices, char** selection);
int user_input_columns(int choices, char** selection);
int user_input_rows(int choices, char** selection);
int board_init(int columns, int rows);


int main(int argc, char** argv) {
 int column = 0, row = 0, player = 0;

 player = user_input_players(argc, argv);
 column = user_input_columns(argc, argv);
 row = user_input_rows(argc, argv);
 board_init(column, row);
 return 0;
}

int user_input_players(int choices, char** selection){
  int player_count = 0;
  for(int i = 0; i < choices; i++){
    selection[i];
  }
  while( !(*selection[1] == '1' || *selection[1] == '2')){
    cout << "Please enter number of players: " << endl;
    cin.clear();
    cin >> player_count;
   if(player_count == 1 || player_count == 2){
    return player_count;
   }
  player_count = *selection[1];
  return player_count;
 }
}

int user_input_columns(int choices, char** selection){
 int column_count = 0;
 for(int i = 0; i < choices; i++){
  selection[i];
  }
 column_count = atoi(selection[2]);
 if(column_count >= 4 && column_count <= 20){
  return column_count;
  }
 while( !(column_count >= 4 && column_count <= 20)){
  cout << "Please enter number of columns: " << endl;
  cin.clear();
  cin >> column_count;
   if(column_count >= 4 && column_count <= 20){
     return column_count;
    }
  }
}

int user_input_rows(int choices, char** selection){
 int row_count = 0;
 for(int i = 0; i < choices; i++){
   selection[i];
   }
 row_count = atoi(selection[3]);
 if(row_count >= 4 && row_count <= 20){
   return row_count;
  }
 while( !(row_count >= 4 && row_count <= 20)){
    cout << "Please enter number of rows: " << endl;
    cin.clear();
    cin >> row_count;
    if(row_count >= 4 && row_count <= 20){
      return row_count;
    }
  }
}

 int board_init(int columns, int rows){  // Valgrind shows no memory allocation because of error
  int** board = new int*[rows];
  for(int i = 0; i < rows; i++){
   board[i] = new int[columns];
  }
}

我正在尝试根据主线参数中声明的列和行数分配内存。例如a.out 2 4 6意味着要用2名玩家，4列，6行进行a.out比赛。我是...

Answer 1

如果允许使用矢量，请将init_board函数改为使用2d矢量：