// check/check.h
-#ifndef _CHECK_H_
-#define _CHECK_H_
+#ifndef CHECK_H
+#define CHECK_H
// fcntimer is defined in timer.cpp and used for timing check functions only:
unsigned fcntimer(unsigned fcn());
unsigned lsolve_onedim();
unsigned series_expansion();
-#endif // ndef _CHECK_H_
+#endif // ndef CHECK_H