#include <string.h> /* for memset */
-int zeroLUT[]; /* lookup table to find number of leading zeroes */
+extern int zeroLUT[]; /* lookup table to find number of leading zeroes */
-FILE *in, *out;
+extern FILE *in, *out;
byte negbuff[BUFSIZE+4]; /* byte I/O buffer, allowing for 4 "negative"
locations */