#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char a[3][3];
int b[3][3];
int cur = 0;
int sn;
void step() { // функция хода крестиком дял пользователя
    sn = 0;
            printf("Place X in (Enter number 1 to 9): ");
            do {
                scanf("%d",&sn);
                switch (sn) {
                    case 1: if (b[0][0] != 0) sn = 0; break;
                    case 2: if (b[0][1] != 0) sn = 0; break;
                    case 3: if (b[0][2] != 0) sn = 0; break;
                    case 4: if (b[1][0] != 0) sn = 0; break;
                    case 5: if (b[1][1] != 0) sn = 0; break;
                    case 6: if (b[1][2] != 0) sn = 0; break;
                    case 7: if (b[2][0] != 0) sn = 0; break;
                    case 8: if (b[2][1] != 0) sn = 0; break;
                    case 9: if (b[2][2] != 0) sn = 0; break;
                default: break;
            }
                if (sn > 9 || sn < 1) {
                    printf("\nYour number is not fit.\nTry to enter again: ");
                }
            } while (sn > 9 || sn < 1);
            printf("\n");
            printf("\n");
            switch (sn) {
                case 1: a[0][0] = 'X'; b[0][0] = 1; break;
                case 2: a[0][1] = 'X'; b[0][1] = 1; break;
                case 3: a[0][2] = 'X'; b[0][2] = 1; break;
                case 4: a[1][0] = 'X'; b[1][0] = 1; break;
                case 5: a[1][1] = 'X'; b[1][1] = 1; break;
                case 6: a[1][2] = 'X'; b[1][2] = 1; break;
                case 7: a[2][0] = 'X'; b[2][0] = 1; break;
                case 8: a[2][1] = 'X'; b[2][1] = 1; break;
                case 9: a[2][2] = 'X'; b[2][2] = 1; break;
                default: break;
            }
}

void botstep() {
    int CBS = 0;
    for (int h = 0; h != 3; h++) {
        for (int g = 0; g != 3; g++) {
            if (b[h][g] == 0 && CBS == 0) {
                b[h][g] = 2;
                a[h][g] = 'O';
                CBS = 1;
            }
        }
    }
}

void output() {
    for (int i = 0; i != 3; i++) {
        for (int j = 0; j != 3; j++) {
            printf("%c ",a[i][j]);
            }
    printf("\n");
    }
    printf("\n");
}

void checker() {
    if (b[0][0] == b[0][1] && b[0][1] == b[0][2])
    if (b[1][0] == b[1][1] && b[1][1] == b[1][2])
    if (b[2][0] == b[2][1] && b[2][1] == b[2][2])
    if (b[0][0] == b[1][0] && b[1][0] == b[2][0])
    if (b[0][1] == b[1][1] && b[1][1] == b[2][1])
    if (b[0][2] == b[1][2] && b[1][2] == b[2][2])
    if (b[0][0] == b[1][1] && b[1][1] == b[2][2])
    if (b[0][2] == b[1][1] && b[1][1] == b[2][0])
}

void win () {

}

int main() // основная функция
{
    for (int i = 0; i != 3; i++) {
        for (int j = 0; j != 3; j++) {
            b[i][j] = 0;
            cur = cur + 1;
            a[i][j] = cur + '0';
            printf("%c ",a[i][j]);
        }
        printf("\n");
    }
    for (int i = 1; i != 10; i++) {
        if (i % 2 == 1) {
            if (i != 9) step();
            else {
                step();
                output();
            }
        }
        else {
            botstep();
            output();
        }
    }
    return 0;
}