Moved test_sum into it's own directory under scripts/

scripts/test_sum/test_sum.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+
+//functions be local in C
+int sum(int n) {
+	if (n < 2) {
+		return n;
+	}
+
+	return n + sum(n - 1);
+}
+
+//the test case (C)
+void test_sum(int key, int val) {
+	const int result = sum(val);
+	printf("%d: %d\n", key, result);
+}
+
+int main() {
+	for (int i = 0; i <= 10; i++) {
+		test_sum(i, i * 1000);
+	}
+}