#include <stdio.h>

/* -------------------------------------------------------------
   Structure definition

   Note: You MUST define the structure BEFORE you can
         define/declare any variable of this structure !!!
   ------------------------------------------------------------- */
struct BankAccount
{
   int    accNum;
   double balance;
};

extern struct BankAccount a;   // Declare structure variable a

void print()
{
   printf("a.accNum = %d  a.balance = %f\n", a.accNum, a.balance);
}