C ++ if语句导致无限循环

Question

In my function, I added a if statement to keep the users inputting the correct coordinates, if the first if statement is false, it will cause an infinite loop. IF the first if statement is correct and the second if statement is false, it works perfectly fine.

void Sheep::sheepProcess(BoardSet& board)
{
    char middle;

    cout << "Your move? ";
    cin >> x1 >> y1 >> middle >> x2 >> y2;
    if (correctInput(x1, y1, x2, y2))
    {
        convertCoordinates(x1, y1, x2, y2); //x=z and y=w

        if(board.legalMoveForSheep(z1, w1, z2, w2))
        {
            board.adjustBoardForSheep(z1, w1, z2, w2);

        }
        else
        {
            cout << "Illegal Move, Try again" << endl;
            sheepProcess(board);

        }

    }
    else
    {
        cout << "Illegal input, Try again" << endl;
        sheepProcess(board);
    }

}

If you need more if the code, such as the bools. let me know

Edit:

class Sheep {
public:

    void sheepProcess(BoardSet& board);
    void convertCoordinates(char x1, int y1, char x2, int y2);
    void initalizedItems();


private:
    char x1, x2;
    int y1, y2, z1, z2, w1, w2;
};

Answer 1

You're not eating the input that's standing ready on cin . The next read is getting the very same input which also fails, repeat ad nauseam.

Solution: When you detect there's input standing ready that's not valid, eat it & throw away, complain to user about providing bad input and allow him to retry.