Producer Consumer Problem C Program

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

void main()
{
 int ch,n,c1=0,c2=0,produce[23],consume[23];
 clrscr();
 printf("\n\n\n\n\n\t\n\n\t\t\tEnter Stack Size :  ",n);
 scanf("%d",&n);
 while(1)
 {
   clrscr();
   printf("\t\tProducer Stack (Stack Size : %d
                          )\n\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",n);
   display(c1,produce);
   printf("\n\n\t\tConsumer Stack (Stack Size : %d
                          )\n\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",n);
   display(c2,consume);
   printf("\n\t\tCHOICES\n\t\t~~~~~~~\n\t1.Producer\n\t2.Consumer\n\t3.
                                                                     Exit\nEnter your choice :  ");
   scanf("%d",&ch);
   switch(ch)
   {
    case 1:
      if(c1==n)
       printf("Produer stack is FULL.So Producer goes to SLEEP\n");
      else
      {
      c1++;
      printf("\t\tEnter PRODUCE item is :");
      scanf("%d",&produce[c1]);
      }
      break;

    case 2:
      if(c2==n)
         printf("Consumer Stack is FULL.So it goes to SLEEP!..........\n\tReset the Cosumer Stack\n",c2=0);
      else if(c1==0)
        printf("\tProducer stack is EMPTY\n");
      else
       {
       c2++;
       consume[c2]=produce[c1];
       printf("\t\tCONSUME one item");
       c1--;
       }
      break;

    case 3:
      exit(0);

    default:
      printf("\tIt is Wrong choice,Please enter correct choice!............\n");
    }
   getch();
  }
}

 display(int c,int stack[])
 {
  int i;
  printf("\n------------------------------------------------------------------------------\n");
  if(c==0)
  printf("\tStack is EMPTY\n\t\t(Now It is sleeping)");
  else
  for(i=1;i<=c;i++)
  printf("\t%d",stack[i]);
  printf("\n-------------------------------------------------------------------------------\n");
  }