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diff --git a/reference/C/CONTRIB/SNIP/round.h b/reference/C/CONTRIB/SNIP/round.h
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+/*
+** rounding macros by Dave Knapp & Thad Smith
+*/
+
+/* round to integer */
+
+#define iround(x) floor((x)+0.5)
+
+/* round number n to d decimal points */
+
+#define fround(n,d) (floor((n)*pow(10.,(d))+.5)/pow(10.,(d)))