TIC TAC TOE using C language

#include<stdio.h>

void  intro();

int  check(char a[][3],char v);

void select(char a[][3],  int s,char i);

int main()

{

        char  a[3][3],v,ch;

        int s,w,i,j,d,g,h,z,n;

        intro();

        for(i=0;i<=2;i++)

               {

                  for(j=0;j<=2;j++)

                         a[i][j]=' ';

              }

        for(i=1;i<=9;i++)

            {

                           if(i%2!=0)

                                { v='x';   n=1;}

                           else

                                 { v='o';   n=2;}

                printf("\n-------------------------------------------------------------------------");

                printf("\nPLAYER [%d] TURN  :  ",n);scanf("%d",&s);

                select(a,s,v);

                prt(a,3);

                z=check(a,v);

               if(z==30)  break;

        }

        if(z!=30)

           printf("GAME DRAW");

system("PAUSE");

return 0;

}

void  intro()

{

        printf("\t\t\t@@@@@@@@@@@@@@@@@@@@@@");

        printf("\n\t\t\t@@@ TIC- TAC - TOE @@@ ");

         printf("\n\t\t\t@@@@@@@@@@@@@@@@@@@@@@");

        printf("\n\n  1  |  2  |  3  \n");

        printf("-------------------\t\tPLAYER 1  -->  [X] \n");

        printf("  4  |  5  |  6  \n");

        printf("-------------------\t\tPLAYER 2  -->  [O] \n");

        printf("  7  |  8  |  9  \n");

       printf("\n\nENTER THE BLOCK NUMBER:-");

}

void select(char a[][3],  int s,char i)

{

    switch(s)

    {

            case 1 :

                        a[0][0]=i;

                        break;

            case 2:

                        a[0][1]=i;

                        break;

            case 3 :

                        a[0][2]=i;

                        break;

            case 4 :

                        a[1][0]=i;

                        break;

            case 5:

                         a[1][1]=i;

                         break;

            case 6 :

                         a[1][2]=i;

                         break;

            case 7 :

                         a[2][0]=i;

                         break;

            case 8:

                         a[2][1]=i;

                         break;

            case 9 :

                        a[2][2]=i;

                        break;

    }

}

void prt(char a[][3], int s)

{

    int i,j;

    for(i=1;i<=s;i++)

    {

        printf("\t\t\t");

               for(j=1;j<=3;j++)

                  {

                     printf("  %c  ",a[i-1][j-1]);

                    if(j/3!=1)

                        printf("|");

                   }

               if(i/3!=1)

                   printf("\n\t\t\t ---------------\n");

     }

}

int  check(char a[][3],char v)

{

    int g,s,n,m,w;

     for(g=0;g<=2;g++)

     {

         if(v=='x')  w=1;

         if(v=='o')  w=2;

                 if(a[g][0]==v  &&  a[g][1]==v  && a[g][2]==v)

                       {

                          printf("\n\t        *********************************");

                         printf("\n\t\t    CONGRATES PLAYER  (%d)  WIN ",w);

                         printf("\n\t        *********************************\n");

                          return 30;

                        }

                 else  if(a[0][g]==v    &&   a[1][g]==v    &&     a[2][g]==v)

                       {

                          printf("\n\t        *********************************");

                         printf("\n\t\t    CONGRATES PLAYER  (%d)  WIN ",w);

                         printf("\n\t        *********************************\n");

                          return 30;

                        }

                  else  if(a[0][0]==v    &&   a[1][1]==v    &&     a[2][2]==v   ||  a[0][2]==v    &&   a[1][1]==v    &&     a[2][0]==v)

                        {

                          printf("\n\t        *********************************");

                         printf("\n\t\t    CONGRATES PLAYER  (%d)  WIN ",w);

                         printf("\n\t        *********************************\n");

                          return 30;

                        }

    }

}