Added simple implementation of hex/octal conversion

libraries/hex_octal_conv/include/hex.h

@@ -3,16 +3,18 @@
 #define BUFFER_LIMIT 1024
 
 
-char hex_value[BUFFER_LIMIT];
-
-char *HexOctalConv_number_converted_to_hex(char *value);
-
+int HexOctalConv_hex_converted_to_number(char *value);
+int HexOctalConv_octal_converted_to_number(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);
+void HexOctalConv_number_converted_to_hex(char *hex_value, char *value);
+void HexOctalConv_number_converted_to_octal(char *octal_value, char *value);
+
+
+static long rudy_pow(long value, int power);
+
+static int size_of_string(char *value);
+
+static void reverse_order(char *value);