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

#define SPACE ' '

void disp_matrix(void);
int check(void);
void player(void);
int pc(void);

int ininum = 9;
char done;
char matrix[3][3] = {
    {SPACE, SPACE, SPACE},
    {SPACE, SPACE, SPACE},
    {SPACE, SPACE, SPACE}
};

int main(void) {
    do {
    //Display matrix
    disp_matrix();
    //Player
    player();
    //Check
    done = check();
    if(done != SPACE)
        break;
    pc();
    done = check();
    }
    while(done == SPACE);
    if(done == 'X') {
        printf("\nYou win!\n");
        disp_matrix();
        return 0;
    }
    else {
        printf("\nYou lose!\n");
        disp_matrix();
        printf("\n\nArray: %s", &matrix);
    return 0;
    }
}

//Player
void player(void) {
    int x, y;
    printf("\nEnter you coords (X)\n");
    scanf("%d", &x);
    printf("Enter you coords (Y)\n");
    scanf("%d", &y);
    printf("\n");
    x--;
    y--;
    if(x < 0 || y < 0 || x > 2 || y > 2 || matrix[x][y] != SPACE || matrix[x][y] == 'O') {
        printf("Error move!");
    player();
    }
    else {
        matrix[x][y] = 'X';
        --ininum;
    }
}

//Computer
int pc(void) {
    static int ix, iy;
    iy = 0;
    for(static int ix = 0; ix < 3; ix++) {
        if(iy < 3 || ininum > 0){
            if(matrix[ix][iy] == SPACE) {
                matrix[ix][iy] = 'O';
                --ininum;
                iy++;
                return 0;
            }
            else {
                iy = 0;
                continue;
            }
    }
}
}

//Matrix display
void disp_matrix(void) {
    for(register int x = 0; x < 3; x++) {
        printf("\n%c | %c | %c\n", matrix[x][0], matrix[x][1], matrix[x][2]);
        if(x < 2)
            printf("\n- | - | -\n");
    }
}

//Check party
int check(void) {
    register int t;
    for(t = 0; t < 3; t++) {
        char *p;
        p = &matrix[0][t];
        if(*p == *(p + 1) && *(p + 1) == *(p + 2))
            return *p;
    }
    for(t = 0; t < 3; t++) {
        char *p;
        p = &matrix [t][0];
        if(*p == *(p+3) && *(p+3) == *(p+6))
            return *p;
    }
    if(matrix[0][0] == matrix[1][1] && matrix[1][1] == matrix[2][2])
        return(matrix[0][0]);
    if(matrix[0][2] == matrix[1][1] && matrix[1][1] == matrix[2][0])
        return(matrix[0][2]);
    return SPACE;
}