--- /dev/null
+#include "cll1.h"
+
+program
+{
+ boolean t=TRUE,f=FALSE;
+
+ printf("TRUE and FALSE = %s", bool_str(t and f) );
+ printf(",TRUE or FALSE = %s", bool_str(t or f) );
+ printf(",not FALSE = %s", bool_str(not f) );
+ printf(",not TRUE = %s\n", bool_str(not t) );
+}