#include <stdio.h>

struct BankAccount
{
   int    accNum;
   double balance;
};

void f( struct BankAccount x )
{
   x.accNum = 888;
   x.balance = 9999.0;
}

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

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

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

   f(a);              // Pass a 
 
   /* ===================================================
      Proof that objects in C are passed by value
      =================================================== */
   printf("a = (%d, %f)\n", a.accNum, a.balance);   
}