لماذا لا يتوقف تنفيذ البرنامج بلغة c

يدخل في حلقة لا نهائية

#include <stdio.h>
  
  void main ()
{
  int n;
  int amount;
  float Service_charge;
  double Total_amount;
  printf("Enter any number to continue or press 0 to stop:>");
  scanf("%d",&n);
  while(n !=0 ){
    if(n==0)
      break;
    printf("\nEnter the amount:");
    scanf("%d",&amount);
    if(amount < 50){
      Service_charge=1;
      printf("Service charge $ %.2f",Service_charge);
      printf("\n-------------------------------");
      Total_amount=amount + Service_charge;
      printf("\nTotal amount is $ %.2f",Total_amount);
      printf("\n-------------------------------");}
    else {
      Service_charge = amount * 15/100;
      printf("\nService charge $ %.2f",Service_charge);
      printf("\n-------------------------------");
      Total_amount=amount + Service_charge;
      printf("\nTotal amount is $ %.2f",Total_amount);
      printf("\n-------------------------------");
    }
  }

  printf("Program end……….") ;

}