[C Language] Run C แล้วเวลาพิมตัวอักษร จะขึ้นลูปเรื่อยๆ อยากให้แก้ เป็นขึ้นข้อความแจ้งเตือน

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
void gameboard();
int main(char argc,char *argv[])
{
    gameboard();
    return 0;
}
void gameboard()
{
    int i,player,go,row,col,line,winner;    char board[3][3];       int s;      int t;
    i = 0,player = 0,go = 0,row = 0, col = 0, line = 0,winner = 0;/*Make board 3*3*/
    board[0][0]='1';board[0][1]='2';board[0][2]='3';board[1][0]='4';board[1][1]='5';board[1][2]='6';board[2][0]='7';board[2][1]='8';board[2][2]='9';

        for( i = 0; i<9 && winner==0; i++)
            {/*Display the board*/
                system("cls");
                printf("\n\n");
            for(t=0;t<3;t++)
                {
                    printf("                                    %c | %c | %c \n",
                        board[t][0], board[t][1], board[t][2]);
                    printf("                                   ---+---+---\n");
                }
                    printf("\n                                   Unfinished\n");
                player = i%2 + 1;/* swap players time playing*/
                do
                {
                    printf("\nPlayer No.%d [%c] 's Turn\nEnter Slot No. : ", player,(player==1)?'X':'O');
                    scanf("%d", &go);
                    row = (--go/3);//Get row index
                    col = go%3;//Get column index
                }
                while(go<0 || go>9 || board[row][col]>'9');board[row][col]= (player == 1) ? 'X' : 'O';//Insert player symbol
//Check for a winning line
                if((board[0][0] == board[1][1] && board[0][0] == board[2][2]) || (board[0][2] == board[1][1] && board[0][2] == board[2][0]))
                {
                    winner = player;
                }
                else
                {/* Check rows and columns for a winning line */
                    for(line = 0; line <= 2; line++)
                    {
                    if((board[line][0] == board[line][1] && board[line][0] == board[line][2])||(board[0][line] == board[1][line] && board[0][line] == board[2][line]))
                        winner = player;
                    }
                }
            }
//display the final board
    system("cls");
    printf("\n\n");
        for(t=0;t<3;t++)
        {
            printf(" %c | %c | %c\n", board[t][0], board[t][1], board[t][2]);
            printf("---+---+---\n");
        }
//Display result message
        if(winner == 0)
            {
                printf("\nDraw\n");
            }
        else
            {
                printf("\n%s\n",(winner==1)?"Congrat, X Wins!!!":"Congrat, O Wins!");
            }
    printf("\nCan you play again press Y : ");
        getchar();
        s=getchar();
        if(s==89 || s==121)
        {system("cls");
            gameboard(); /*recursive function*/
        }
        else
        {system("cls");
            printf("\n\n\nThanks for playing!! Goodbye.\n");
        }
}