C: sum of multiples + complex numbers

c/sum-of-multiples/src/sum_of_multiples.h

@@ -0,0 +1,21 @@
+#ifndef SUM_OF_MULTIPLES_H
+#define SUM_OF_MULTIPLES_H
+
+#include <stddef.h>
+
+unsigned int sum(const unsigned int *factors,
+                 const size_t number_of_factors, const unsigned int limit);
+
+/* See GNUmakefile below for explanation
+ * https://github.com/braoult/exercism/blob/master/c/templates/GNUmakefile
+ */
+#if defined UNIT_TEST || defined DEBUG
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+#ifdef  TESTALL
+#undef  TEST_IGNORE
+#define TEST_IGNORE() {}
+#endif
+
+#endif