题解 | #井字棋#

#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    int numK = 0;
    int numB = 0;
    char a[3][3];
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            cin >> a[i][j];
        }
    }

    // 遍历行是否存在3个相同符号
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            if (a[i][j] == 'K') {
                numK++;
            }
            if (a[i][j] == 'B') {
                numB++;
            }
        }
        if (numK == 3) {
            cout << "KiKi wins!";
            return 0;
        } else if (numB == 3) {
            cout << "BoBo wins!";
            return 0;
        } else {
            numK = 0;
            numB = 0;
        }
    }

    // 遍历列是否存在3个相同符号
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            if (a[j][i] == 'K') {
                numK++;
            }
            if (a[j][i] == 'B') {
                numB++;
            }
        }
        if (numK == 3) {
            cout << "KiKi wins!";
            return 0;
        } else if (numB == 3) {
            cout << "BoBo wins!";
            return 0;
        } else {
            numK = 0;
            numB = 0;
        }
    }

    // 遍历两条对角线是否存在3个相同符号
    for (int t = 0; t < 2; t++) {
        if (t == 0) {
            for (int i = 0; i < 3; i++) {
                if (a[i][i] == 'K') {
                    numK++;
                }
                if (a[i][i] == 'B') {
                    numB++;
                }
            }
        }
        if (t == 1) {
            for (int i = 0; i < 3; i++) {
                if (a[i][2 - i] == 'K') {
                    numK++;
                }
                if (a[i][2 - i] == 'B') {
                    numB++;
                }
            }
        }
        if (numK == 3) {
            cout << "KiKi wins!";
            return 0;
        } else if (numB == 3) {
            cout << "BoBo wins!";
            return 0;
        } else {
            numK = 0;
            numB = 0;
        }
    }

    cout << "No winner!";

    return 0;
}