#include <stdio.h>

/* ------------------------
   Structure definition
   ------------------------ */
struct BankAccount
{
   int    accNum;
   double balance;
};


extern void update( struct BankAccount x );


int main(int argc, char *argv[])
{
   struct BankAccount a;

   a.accNum  = 123;
   a.balance = 1000.0;

   printf("Before calling update: a.accNum = %d  a.balance = %f\n",
              a.accNum, a.balance);

   update (a);    // Demonstrate that struct is passed-by-value

   printf("AFTER  calling update: a.accNum = %d  a.balance = %f\n",
              a.accNum, a.balance);

}