/* A simple program to convert a number of quarts to liters    *
 * Version 2:  using local variables and simple error checking */
 
#include <stdio.h>
#include <assert.h>
 
int main (void)           /* explicitly state main has no parameters */
{  int quarts;                               /* variables declared   */
   double liters;                            /* at the start of main */
 
   printf ("Enter volume in quarts: ");   
   scanf ("%d", &quarts);                 

   assert (quarts >= 0);                      /* abort if quarts < 0 */
 
   liters = quarts / 1.056710 ;                 
   printf ("%d quarts = %lf liters\n", quarts, liters);

   return 0;                           /* tell OS no errors occurred */
}