--- /dev/null
+/* Bonnie Berger, David Wilson and Theodore Tonchev 1992 */
+/* C Header File */
+/* Types of Errors are defined here. */
+
+#ifndef __scsystem_h__
+#define __scsystem_h__ 1
+
+/* Error Definitions */
+#define NO_ERR 0
+#define USAGE_ERR 1
+#define SWITCH_ERR 2
+#define FOPEN_ERR 3
+#define FWRITE_ERR 4
+#define FREAD_ERR 5
+#define MAGIC_ERR 6
+#define MEMORY_ERR 7
+
+/* Procedure Prototypes */
+
+void error(int errcode, char* msg);
+
+void usage();
+
+void timestamp(FILE* flog);
+
+#endif /* __scsystem_h__ */
+
+/* End of Code */