#ifndef MAT3_HAS_BEEN_INCLUDED
#define MAT3_HAS_BEEN_INCLUDED
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/* ----------------------------- Constants ------------------------------ */
/*
void MAT3cross_product(MAT3vec result,MAT3vec,MAT3vec);
void MAT3perp_vec(MAT3vec result_vec, MAT3vec vec, int is_unit);
+#ifdef __cplusplus
+}
+#endif
+
#endif /* MAT3_HAS_BEEN_INCLUDED */