类中的 C++ int 被设置为值，似乎不知从何而来

在某些条件下，int winner应该设置为 2，但它以某种方式被设置为各种更高的值，最常见的是 6。我不知道这是怎么发生的，因为我的类中没有其他函数会影响winner，而且该程序中甚至没有提到该变量。最让我困惑的是，我有一个几乎相同的函数(P2Move()(，它在将winner变量设置为P1Move()的方式上实际上是相同的，并且该函数完美运行。

一些信息：这是一部分的类称为 Board，它充当由 Square 类对象组成的棋盘数组。

下面是导致问题的函数。在底部附近，语句else if((canTake.size()==0)&&(canMove.size()==0)) {Board::winner = 2;}导致问题。当我从函数中删除有问题的部分时，其他一切似乎都可以工作，但我需要该部分才能提交最终项目。

void Board::P1Move()
{
P1pieces = 0;
std::vector <Move> canMove;
std::vector <Move> canTake;
for(int j = 0; j < bSize; j++)
{ //Start of j loop.
for(int i = 0; i < bSize; i++)
{ //Start of i loop.
Square sq = board[i][j];
bool cTakeL = canTakeL(i,j);
bool cTakeR = canTakeR(i,j);
bool cMoveL = canMoveL(i,j);
bool cMoveR = canMoveR(i,j);
if(board[i][j].getPl() == P1)
{
P1pieces++;
if(cTakeL)
{
Move a = Move(sq.getIndex(),board[i-2][j+2].getIndex(),board[i-1][j+1].getIndex(),0);
canTake.push_back(a);
}
if(cTakeR)
{
Move b = Move(sq.getIndex(),board[i+2][j+2].getIndex(),board[i+1][j+1].getIndex(),0);
canTake.push_back(b);
}
if(cMoveL)
{
Move c = Move(sq.getIndex(),board[i-1][j+1].getIndex(),0,0);
canMove.push_back(c);
}
if(cMoveR)
{
Move d = Move(sq.getIndex(),board[i+1][j+1].getIndex(),0,0);
setWinner(d.getSpos());
canMove.push_back(d);
}
}
} //End of i loop.
} //End of j loop.
if(canTake.size()!=0)
{
time_t t;
time(&t);
srand(t);
int moveNum = rand()%canTake.size();
std::string output = "p1 ";
Move out = canTake.at(moveNum);
int i = 0;
int j = 0;
for(int y = 0; y < bSize; y++)
{
for(int x = 0; x < bSize; x++)
{
if(board[x][y].getIndex()==out.getSpos())
{
i = x;
j = y;
}
}
}
if(board[i-2][j+2].getIndex()==out.getEndPos())
{
board[i-2][j+2].setOcc(true);
board[i-2][j+2].setPl(P1);
board[i-1][j+1].setOcc(false);
board[i-1][j+1].setPl(NA);
}
else if(board[i+2][j+2].getIndex()==out.getEndPos())
{
board[i+2][j+2].setOcc(true);
board[i+2][j+2].setPl(P1);
board[i+1][j+1].setOcc(false);
board[i+1][j+1].setPl(NA);
}
output = output + out.toString();
setCmove(output);
board[i][j].setOcc(false);
board[i][j].setPl(NA);
}
else if(canMove.size()!=0)
{
time_t t;
time(&t);
srand(t);
int moveNum = rand()%canMove.size();
std::string output = "p1 ";
Move out = canMove.at(moveNum);
int i = 0;
int j = 0;
for(int y = 0; y < bSize; y++)
{
for(int x = 0; x < bSize; x++)
{
if(board[x][y].getIndex()==out.getSpos())
{
i = x;
j = y;
}
}
}
if(board[i-1][j+1].getIndex()==out.getEndPos())
{
board[i-1][j+1].setOcc(true);
board[i-1][j+1].setPl(P1);
}
else if(board[i+1][j+1].getIndex()==out.getEndPos())
{
board[i+1][j+1].setOcc(true);
board[i+1][j+1].setPl(P1);
}
output = output + out.toString();
setCmove(output);
board[i][j].setOcc(false);
board[i][j].setPl(NA);
}
else if((canTake.size()==0)&&(canMove.size()==0))
{
Board::winner = 2;
}
P1pieces = canTake.size() + canMove.size();
}