/* File: rec_stack.c

   Demonstrate that local variables are placed on a "stack"
   even for recursive functions.
*/

#include <stdio.h>

double rec_func (int n) {
   double x, y  ;

   if (n == 0) return 17.9 ;

   printf("n = %d: Address of n = %u, of x = %u, of y = %u\n", 
      n, &n, &x, &y) ;
   x = rec_func(n-1) ;
   return x ;
}


main() {
   double x, y ;

   printf("Size of double = %d\n\n", sizeof(double) ) ;

   printf("main:  Address of x = %u, of y = %u\n", &x, &y) ;
   x = rec_func(1) ;
   printf("\n") ;

   printf("main:  Address of x = %u, of y = %u\n", &x, &y) ;
   x = rec_func(3) ;
   printf("\n") ;

   printf("main:  Address of x = %u, of y = %u\n", &x, &y) ;
   x = rec_func(5) ;
   printf("\n") ;

}