I am facing the issue that copy of an 2 dimensional array is not made in each stack frame of recursive call. I am doing indirect recursion.
I also tried sending my data in function call from main() function but the copy was not made. Same address was used in every recursive call.
class board
{
public:
int board_arr[8][8];
public:
board()
{
}
void player1Turn()
{
for (int i = 0; i < rowCount; i++)
{
for(int j = 0; j < rowCount; j ++ )
{
if (board_arr[i][j] == 1)
{
//checking if the pawn can move anywhere
if (i + 1 <=7 && j - 1 >= 0 && board_arr[i + 1][j - 1] == 0 )
{
board_arr[i][j] = 0;
board_arr[i + 1][j - 1] = 1;
player2Turn();
}
if (i + 1 <=7 && j + 1 <= 7 && board_arr[i + 1][j + 1] == 0)
{
board_arr[i][j] = 0;
board_arr[i + 1][j + 1] = 1;
player2Turn();
}
//opponent infront
//killing
//if opponent is infront and checking if you can kill it or not
if (i + 2 <= 7
&& i + 1 <= 7
&& j - 2 >=0
&& j - 1 >= 0
&& board_arr[i + 1][j - 1] == 2
&& (board_arr[i + 2][j - 2]==0))
{
board_arr[i][j] = 0;
board_arr[i + 2][j - 2] = 1;
board_arr[i + 1][j - 1] = 0;
cout << endl << "kill by p1 " << endl;
player2Turn();
}
if (i + 2 <= 7
&& i + 1 <= 7
&& j + 2 <= 7
&& j + 1 <=7
&& board_arr[i + 1][j + 1] == 2
&& (board_arr[i + 2][j + 2]==0))
{
board_arr[i][j] = 0;
board_arr[i + 1][j + 1] = 0;
board_arr[i + 2][j + 2] = 1;
cout << endl << "kill by p1 " << endl;
player2Turn();
}
}
}
}
}
void player2Turn()
{
for (int i = rowCount-1; i >= 0; i--)
{
for (int j = rowCount-1; j >= 0; j--)
{
if (board_arr[i][j] == 2)
{
//checking if the pawn can move anywhere
if (i - 1 >= 0 && j - 1 >= 0 && board_arr[i - 1][j - 1] == 0)
{
board_arr[i][j] = 0;
board_arr[i - 1][j - 1] = 2;
player1Turn();
}
if (i - 1 >= 0 && j + 1 <=7 && board_arr[i - 1][j + 1] == 0)
{
board_arr[i][j] = 0;
board_arr[i - 1][j + 1] = 2;
player1Turn();
}
//opponent infront
//killing
//if opponent is infront and checking if you can kill it or not
if (i - 2 >= 0
&& i - 1 >= 0
&& j - 2 >= 0
&& j - 1 >= 0
&& board_arr[i - 1][j - 1] == 1
&& (board_arr[i - 2][j - 2] ==0))
{
board_arr[i][j] = 0;
board_arr[i - 2][j - 2] = 2;
board_arr[i - 1][j - 1] = 0;
cout << endl << "kill by p2 " << endl;
player1Turn();
}
if (i + 2 <= 7
&& i - 1 >= 0
&& j + 2 <=7
&& j + 1 <= 7
&& board_arr[i - 1][j + 1] == 1
&& (board_arr[i - 2][j + 2] ==0))
{
board_arr[i][j] = 0;
board_arr[i - 2][j + 2] = 1;
board_arr[i - 1][j + 1] = 0;
cout << endl << "kill by p1 " << endl;
player1Turn();
}
}
}
}
}
};
same copy of the board_arr was used in each call.
You are not passing board_arr to a recursive method, that is those methods do not have that array in their parameters. So board_arr is not being copied.
Because those methods are instance methods of board class, everything is passed in each method call is this pointer to the instance of board.