Tic Tac Toe (Personal Project)

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

int checkwin (char t[10], char c)
{
    int x,i;
    x=0;
    if ((t[1]==t[5]) &&  (t[5]==t[9]) && (t[9]==c))
    {
        x=1;
        return x;
    }

    if ((t[3]==t[5]) &&  (t[5]==t[7]) && (t[7]==c))
    {
        x=1;
        return x;
    }

    for (i=1;i<=3;i++)
    {
        if ((t[i]==t[i+3]) &&  (t[i+3]==t[i+6]) && (t[i+3]==c))
        {
            x=1;
            return x;
        }
    }

    for (i=1;i<=7;i=i+3)
    {
        if ((t[i]==t[i+1]) &&  (t[i+1]==t[i+2]) && (t[i+2]==c))
        {
            x=1;
            return x;
            printf ("ahla");
        }
    }
    return x;
}
int update (char t[10] ,int n,int i)
{
    if (i==1)
    {
        t[n]='X';
    }else
    {
        t[n]='O';
    }
    return t;
}
int turn (int i)
{
    if (i==1)
    {
        i=2;
    }else
    {
        i=1;
    }
    return i;
}
void gamepad (char t[10])
{
    printf ("       |        |\n");
    printf ("   %c   |   %c    |   %c   \n",t[1],t[2],t[3]);
    printf ("       |        |\n");
    printf ("-------------------------\n");
    printf ("       |        |\n");
    printf ("   %c   |   %c    |   %c   \n",t[4],t[5],t[6]);
    printf ("       |        |\n");
    printf ("-------------------------\n");
    printf ("       |        |\n");
    printf ("   %c   |   %c    |   %c   \n",t[7],t[8],t[9]);
    printf ("       |        |\n");
}
int reset (char t[10])
{
    int i;
    for (i=1;i<=9;i++)
    {
        t[i]=i+48;
    }
}
int draw (char t[10])
{
    int i,test;
    i=0;
    test=1;
    for (i=1;i<=9;i++)
    {
        if (t[i]!='X' && t[i]!='O')
        {
            test=0;
        }
    }
    return test;
}

int main()
{
    char t[10] = {'0','1','2','3','4','5','6','7','8','9'};
    int i,n,win1,win2,win0;
    char res;
    i=1;
    do{
        do{
            printf ("\n        Welcome to TicTacToe      \n");
            printf ("\nPlayer 1: X ///// Player 2: O\n");
            gamepad (t);
            do{
                printf ("\nPlayer %d choose a column: ",i);
                scanf ("%d",&n);
            }while (t[n]=='X' || t[n]=='O');
            update(t,n,i);
            if (checkwin (t,'X')==1)
            {
                win1=1;
            }
            if (checkwin (t,'O')==1)
            {
                win2=1;
            }
            i=turn(i);
            win0=draw(t);
            system("cls");
       } while (win1==0 && win2==0 && win0==0);
       if (win1==1)
       {
           system("color B");
           gamepad (t);
           win1=0;
           printf ("Player 1 won good job");
       }
       if (win2==1)
       {
           system("color A");
           gamepad (t);
           win2=0;
           printf ("Player 2 won good job");
       }
       if (win0==1)
       {
           system("color C");
           gamepad (t);
           win0=0;
           printf ("Draw");
       }
       do{
            printf ("\nReplay another game? (Y/N)");
            scanf ("%c",&res);
       }while((toupper(res)!='N') && (toupper(res)!='Y'));
       system("cls");
       reset (t);
     }while (toupper(res)!='N');
     printf ("Thanks for using my program <3");
}