Turbo c++ อยากให้โปรแกรมจบการทำงานครับ เมือ id=9 ควรทำยังไงครับ

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

void main(void)
{
	clrscr();
	int id,number,enterchange;
	float price,discount,amount,change;

	
	  gotoxy(1,17);
		cprintf("Enter id of product : "); scanf("%d",&id); gotoxy(25,17);
	  if (id==1)
		 printf("Chcolate Pudding 40 Bath\n");
	  else
	  gotoxy(1,18);
		 printf("Enter id of number : "); scanf("%d",&number);
	  if (id==1)
		price=(40*number);


		 printf("The total of money : %.2f\n",price);
	  if(number>=10)
		{
		discount=price*0.1;
		printf("discount : %.2f\n",discount);
		}
	  else
		if(number>=5)
		{
		discount=price*0.05;
		printf("discount : %.2f\n",discount);
		}
	  else
		if(number<5)
		{
		discount=price*0 ;
		printf("No discount : %.2f\n",discount);
		}

	      amount=price-discount;
	     printf("the amount of money : %.2f\n",amount);

	    if(amount)
	    {

		printf("Enter Change : "); scanf("%d",&enterchange) ;

	     }
	       change=enterchange-amount  ;
	       printf("Change : %.2f\n",change);
		 gotoxy(1,24);
		cprintf("BY Sarun Wattanayothin 6232040073");


	  getch();
	  }