Working on exercise 3-5 but I'm creating some libraries

libraries/hex_octal_conv/include/hex.h

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+#define BUFFER_LIMIT 1024
+
+
+char hex_value[BUFFER_LIMIT];
+
+char *HexOctalConv_number_converted_to_hex(char *value);
+
+int HexOctalConv_hex_part_to_number(char hex_part);
+
+long HexOctalConv_rudy_pow(long value, int power);
+
+int HexOctalConv_size_of_string(char *value);
+
+char HexOctalConv_convert_hex_part(int value);
+
+void HexOctalConv_reverse_order(char *value);