尝试运行此程序，但要了解check_move函数。我相信这是为了确保那里没有一块板子......让移动变得非法。 它被声明为一个函数，但是我找不到定义/实现。程序尝试使用调用该函数 在void input（）中“while（check_move（）== false）”。有点失落......有人可以帮忙吗？
//This is a 2 player checker game
//
#include <iostream>
using namespace std;
char board[8][8] =
{
{' ', 'b', ' ', 'b', ' ', 'b', ' ', 'b'},
{'b', ' ', 'b', ' ', 'b', ' ', 'b', ' '},
{' ', 'b', ' ', 'b', ' ', 'b', ' ', 'b'},
{' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '},
{' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '},
{'r', ' ', 'r', ' ', 'r', ' ', 'r', ' '},
{' ', 'r', ' ', 'r', ' ', 'r', ' ', 'r'},
{'r', ' ', 'r', ' ', 'r', ' ', 'r', ' '},
};
char turn = 'B';
bool leap;
bool game_running = true;
int row1, row2, column1, column2;
void display_board();//
void input();//
bool check_move();//where is the
void move();
void do_leap();
void king();
void game_over();
int main()
{
cout << "***CHECKER GAME***\n";
cout << "Player 1 [b]\n";
cout << "Player 2 [r]\n\n";
cout << "Multiple leaps are supported.\n";
cout << "A capital letter represents a king piece.\n";
cout << "NOTE: Rows and columns are counted starting from 0, not 1.\n";
cout << "<------COLUMNS------>\n";
cout << "^\n";
cout << "|\n";
cout << "|\n";
cout << "|\n";
cout << "ROWS\n";
cout << "|\n";
cout << "|\n";
cout << "|\n";
cout << "v\n\n";
cout << "NOTE: Resize your console screen so that this line fits on the screen:\n";
cout << "_____________________________________________________________________________________\n\n";
cout << "Press enter to begin...";
cin.get();//This waits for the user to press enter before continuing
while (game_running)//game_running was initialzed to true so will run
{
display_board();//function is called to display board
if (turn == 'B')//was initialzed to 'B'line 19
{
cout << "--Player 1 [B]--\n";//says player 1 turn
}
else if (turn == 'R')
{
cout << "--Player 2 [R]--\n";
}
//funcitons called
input();
move();
king();
game_over();
}
if (turn == 'B')
{
cout << endl << endl << "Player 2 [Red] wins!!!\n";
}
else if (turn == 'R')
{
cout << endl << endl << "Player 1 [Black] wins!!!\n";
}
cout << "GAME OVER!\n";
}
void display_board()//board displayed is similar to tic tac toe except its bigger, has empty spaces
{
cout << "==================================================================================\n\n\n\n";
cout << " 0 1 2 3 4 5 6 7 \n";
cout << " _________________________________________________________________________________\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "0 | " << board[0][0] << " | " << board[0][1] << " | " << board[0][2] << " | " << board[0][3] << " | " << board[0][4] << " | " << board[0][5] << " | " << board[0][6] << " | " << board[0][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "1 | " << board[1][0] << " | " << board[1][1] << " | " << board[1][2] << " | " << board[1][3] << " | " << board[1][4] << " | " << board[1][5] << " | " << board[1][6] << " | " << board[1][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "2 | " << board[2][0] << " | " << board[2][1] << " | " << board[2][2] << " | " << board[2][3] << " | " << board[2][4] << " | " << board[2][5] << " | " << board[2][6] << " | " << board[2][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "3 | " << board[3][0] << " | " << board[3][1] << " | " << board[3][2] << " | " << board[3][3] << " | " << board[3][4] << " | " << board[3][5] << " | " << board[3][6] << " | " << board[3][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "4 | " << board[4][0] << " | " << board[4][1] << " | " << board[4][2] << " | " << board[4][3] << " | " << board[4][4] << " | " << board[4][5] << " | " << board[4][6] << " | " << board[4][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "5 | " << board[5][0] << " | " << board[5][1] << " | " << board[5][2] << " | " << board[5][3] << " | " << board[5][4] << " | " << board[5][5] << " | " << board[5][6] << " | " << board[5][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "6 | " << board[6][0] << " | " << board[6][1] << " | " << board[6][2] << " | " << board[6][3] << " | " << board[6][4] << " | " << board[6][5] << " | " << board[6][6] << " | " << board[6][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
cout << " | | | | | | | | |\n";
cout << " | | | | | | | | |\n";
cout << "7 | " << board[7][0] << " | " << board[7][1] << " | " << board[7][2] << " | " << board[7][3] << " | " << board[7][4] << " | " << board[7][5] << " | " << board[7][6] << " | " << board[7][7] << " |\n";
cout << " | | | | | | | | |\n";
cout << " |_________|_________|_________|_________|_________|_________|_________|_________|\n";
}
void input()//asks player first to CHOOSE their piece using row and column # for exact location, then to MOVE using same concept
{
cout << "Move piece\n";
cout << "Row: ";
cin >> row1;//
cout << "Column: ";
cin >> column1;
while (row1 < 0 || row1 > 7 || column1 < 0 || column1 > 7)//CHOOSE PIECE ...makes sure the input(Chosen piece) is within range
{
cout << "Incorrect input. Enter numbers between 0 and 7.\n";//runs if input out of range
cout << "Move piece\n";
cout << "Row: ";
cin >> row1;//allows another chance to enter input
cout << "Column: ";
cin >> column1;
}
cout << "To box\n";//allows to MOVE to another location based on row and column
cout << "Row: ";
cin >> row2;
cout << "Column: ";
cin >> column2;
while (row2 < 0 || row2 > 7 || column2 < 0 || column2 > 7)//MOVE PIECE...makes sure the move is legal
{
cout << "Incorrect input. Enter numbers between 0 and 7.\n";
cout << "To box\n";
cout << "Row: ";
cin >> row2;
cout << "Column: ";
cin >> column2;
}
while (check_move() == false)//check_move is called....and checks if it is false
{
cout << "ILLEGAL MOVE!!\n";
input();//input function starts again at line 133
}
}
void move()
{
bool king_piece = false;
if (board[row1][column1] == 'B' || board[row1][column1] == 'R')
{
king_piece = true;
}
board[row1][column1] = ' ';
if (turn == 'B')
{
if (king_piece == false)
{
board[row2][column2] = 'b';
}
else if (king_piece == true)
{
board[row2][column2] = 'B';
}
turn = 'R';
}
else if (turn == 'R')
{
if (king_piece == false)
{
board[row2][column2] = 'r';
}
else if (king_piece == true)
{
board[row2][column2] = 'R';
}
turn = 'B';
}
if (leap == true)
{
do_leap();
}
}
void do_leap()
{
char answer;
//It removes the checker piece after leap.
if (row2 > row1 && column2 > column1)
{
board[row2 - 1][column2 - 1] = ' ';
}
else if (row2 > row1 && column2 < column1)
{
board[row2 - 1][column2 + 1] = ' ';
}
else if (row2 < row1 && column2 > column1)
{
board[row2 + 1][column2 - 1] = ' ';
}
else if (row2 < row1 && column2 < column1)
{
board[row2 + 1][column2 + 1] = ' ';
}
display_board();//It displays the board after the changes
//It asks if the user wants to leap again.
do
{
cout << "You just leaped once. Do you want to do a second leap IF YOU CAN? (y/n): ";
cin >> answer;
}
while (answer != 'Y' && answer != 'y' && answer != 'N' && answer != 'n');
if (answer == 'y' || answer == 'Y')
{
row1 = row2;
column1 = column2;
cout << "Leap piece: row: " << row1 << ", column: " << column1 << endl;
cout << "To box\n";
cout << "row: ";
cin >> row2;
cout << "column: ";
cin >> column2;
while (row2 < 0 || row2 > 7 || column2 < 0 || column2 > 7)
{
cout << "Incorrect input. Enter numbers between 0 and 7.\n";
cout << "To box\n";
cout << "Row: ";
cin >> row2;
cout << "Column: ";
cin >> bool check_move()
{
//it checks if a non-king piece is moving backwards.
if (board[row1][column1] != 'B' && board[row1][column1] != 'R')
{
if ((turn == 'B' && row2 < row1) || (turn == 'R' && row2 > row1))
{
leap = false;
return false;
}
}
//It checks if the location the piece is moving to is already taken.
if (board[row2][column2] != ' ')
{
leap = false;
return false;
}
//It checks if location entered by the user contains a piece to be moved.
if (board[row1][column1] == ' ')
{
leap = false;
return false;
}
//It checks if the piece isn't moving diagonally.
if (column1 == column2 || row1 == row2)
{
leap = false;
return false;
}
//It checks if the piece is moving by more than 1 column and only 1 row
if ((column2 > column1 + 1 || column2 < column1 - 1) && (row2 == row1 +1 || row2 == row1 - 1))
{
leap = false;
return false;
}
//It checks if the piece is leaping.
if (row2 > row1 + 1 || row2 < row1 - 1)
{
//It checks if the piece is leaping too far.
if (row2 > row1 + 2 || row2 < row1 - 2)
{
leap = false;
return false;
}
//It checks if the piece isn't moving by exactly 2 columns
if (column2 != column1 + 2 && column2 != column1 - 2)
{
leap = false;
return false;
}
//It checks if the piece is leaping over another piece.
if (row2 > row1 && column2 > column1)
{
if (board[row2 - 1][column2 - 1] == ' ')
{
leap = false;
return false;
}
}
else if (row2 > row1 && column2 < column1)
{
if (board[row2 - 1][column2 + 1] == ' ')
{
leap = false;
return false;
}
}
else if (row2 < row1 && column2 > column1)
{
if (board[row2 + 1][column2 - 1] == ' ')
{
leap = false;
return false;
}
}
else if (row2 < row1 && column2 < column1)
{
if (board[row2 + 1][column2 + 1] == ' ')
{
leap = false;
return false;
}
}
leap = true;
return true;
}
leap = false;
return true;
} column2;
}
}
if (turn == 'B')
{
turn = 'R';
}
else if (turn == 'R')
{
turn = 'B';
}
check_move();
if (leap == false)
{
cout << "INVALID LEAP!!\n";
if (turn == 'B')
{
turn = 'R';
}
else if (turn == 'R')
{
turn = 'B';
}
}
else if (leap == true)
{
move();
}
}
}
void king()
{
for (int i = 0; i < 8; i++)
{
if (board[0][i] == 'r')
{
board[0][i] = 'R';
}
if (board[7][i] == 'b')
{
board[7][i] = 'B';
}
}
}
void game_over()
{
int counter = 0;
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
if (board[i][j] != ' ')
{
counter++;
}
}
}
if (counter > 1)
{
game_running = true;
}
else if (counter == 1)
{
game_running = false;
}
}
}
/*
ISSUE:
-check_move is declared as s function but has no def/implementation
-Could it be intended to be declared as a variable??
答案 0 :(得分：0)
bool check_move();
是forward declaration该函数必须在其他文件中定义。 您应该知道代码的来源并要求完整的来源。
答案 1 :(得分：0)
在do_leap函数的中间，我们看到：
cout << "Column: ";
cin >> bool check_move()
{
//it checks if a non-king piece is moving backwards.
if (board[row1][column1] != 'B' && board[row1][column1] != 'R')
{
这句话的第二行是语法错误;看起来有人将check_move函数复制粘贴到do_leap函数的中间（可能是带有鼠标复制粘贴功能的编辑器中的错误点击）。
错误放置的check_move函数在cin >>之后适合，没有什么明显的，所以看起来这个粘贴操作实际上“切掉”了一些原始代码。您需要从其他来源找到原始代码（或者如果您感到勇敢，精神错乱check_move并尝试重写do_leap的缺失部分。）
答案 2 :(得分：0)
此源代码显然已损坏。
check_move函数在另一个函数的中间声明...
cout << "Column: ";
cin >> bool check_move()
{
...
这不是有效的C ++。
答案 3 :(得分：0)
不知道你的来源在哪里，但是可以在这里找到完整的程序源，并找到缺失的方法：
http://runnable.com/U-_XgNndbURbbgx-/c%2B%2B-checkers-game
bool check_move()
{
//it checks if a non-king piece is moving backwards.
if (board[row1][column1] != 'B' && board[row1][column1] != 'R')
{
if ((turn == 'B' && row2 < row1) || (turn == 'R' && row2 > row1))
{
leap = false;
return false;
}
}
//It checks if the location the piece is moving to is already taken.
if (board[row2][column2] != ' ')
{
leap = false;
return false;
}
//It checks if location entered by the user contains a piece to be moved.
if (board[row1][column1] == ' ')
{
leap = false;
return false;
}
//It checks if the piece isn't moving diagonally.
if (column1 == column2 || row1 == row2)
{
leap = false;
return false;
}
//It checks if the piece is moving by more than 1 column and only 1 row
if ((column2 > column1 + 1 || column2 < column1 - 1) && (row2 == row1 +1 || row2 == row1 - 1))
{
leap = false;
return false;
}
//It checks if the piece is leaping.
if (row2 > row1 + 1 || row2 < row1 - 1)
{
//It checks if the piece is leaping too far.
if (row2 > row1 + 2 || row2 < row1 - 2)
{
leap = false;
return false;
}
//It checks if the piece isn't moving by exactly 2 columns
if (column2 != column1 + 2 && column2 != column1 - 2)
{
leap = false;
return false;
}
//It checks if the piece is leaping over another piece.
if (row2 > row1 && column2 > column1)
{
if (board[row2 - 1][column2 - 1] == ' ')
{
leap = false;
return false;
}
}
else if (row2 > row1 && column2 < column1)
{
if (board[row2 - 1][column2 + 1] == ' ')
{
leap = false;
return false;
}
}
else if (row2 < row1 && column2 > column1)
{
if (board[row2 + 1][column2 - 1] == ' ')
{
leap = false;
return false;
}
}
else if (row2 < row1 && column2 < column1)
{
if (board[row2 + 1][column2 + 1] == ' ')
{
leap = false;
return false;
}
}
leap = true;
return true;
}
leap = false;
return true;
}