Illustration of nested if else

   1:  #include<stdio.h>

   2:  #include<conio.h>

   3:  void main()

   4:  {

   5:  int demand,stock;

   6:  char option;

   7:  printf("Enter the available stock:");

   8:  scanf("%d",&stock);

   9:  printf("Enter the demand:");

  10:  scanf("%d",&demand);

  11:  if(demand>stock)

  12:  {

  13:  printf("Maximum stock at hand %d\n",stock);

  14:  printf("Do you want to purchase type y:\n");

  15:  scanf("\n%c",&option);

  16:  if(option=='y' || option=='Y')

  17:  stock=0;

  18:  }

  19:  else

  20:  stock=stock-demand;

  21:  printf("Closing stock= %d\n",stock);

  22:  getch();

  23:  }