// A simple program to convert a number of quarts to liters
// Version 2:  using local variables and simple error checking
 
#include <iostream.h>
#include <assert.h>
 
int main (void)
{  int quarts;                                  /* variables declared   */
   double liters;                               /* at the start of main */
 
   cout << "Enter volume in quarts: " ;
 
   cin >> quarts;
   assert (quarts > 0);                         /* abort if quarts <= 0 */
 
   liters = quarts / 1.056710 ;                 
 
   cout << quarts << " quarts = "
        << liters << " liters" << endl;

   return 0;
}