1- /* Java Program - Convert Hexadecimal to Octal
2- Author - Tanmay Joshi*/
3-
1+ /**
2+ + * Converts any Hexadecimal Number to Octal
3+ + *
4+ + * @author Tanmay Joshi
5+ + *
6+ + */
47import java .util .Scanner ;
58
69public class HexToOct
710{
8- /*Function that takes the Hexadecimal number as input and returns the decimal form.
9- The input is recieved as a string and the return type is int*/
11+ /**
12+ + * This method converts a Hexadecimal number to
13+ + * a decimal number
14+ + *
15+ + * @param The Hexadecimal Number
16+ + * @return The Decimal number
17+ + */
1018public static int hex2decimal (String s )
1119 {
1220String str ="0123456789ABCDEF" ;
@@ -20,12 +28,34 @@ public static int hex2decimal(String s)
2028 }
2129return val ;
2230 }
31+
32+ /**
33+ + * This method converts a Decimal number to
34+ + * a octal number
35+ + *
36+ + * @param The Decimal Number
37+ + * @return The Octal number
38+ + */
39+ public static int decimal2octal (int q )
40+ {
41+ int now ;
42+ int i =1 ;
43+ int octnum =0 ;
44+ while (q >0 )
45+ {
46+ now =q %8 ;
47+ octnum =(now *(int )(Math .pow (10 ,i )))+octnum ;
48+ q /=8 ;
49+ i ++;
50+ }
51+ octnum /=10 ;
52+ return octnum ;
53+ }
2354// Main method that gets the hex input from user and converts it into octal.
2455public static void main (String args [])
2556 {
2657String hexadecnum ;
27- int decnum ,i =1 ,j ;
28- int octnum [] =new int [100 ];//Array to store the octal from of the hex number.
58+ int decnum ,octalnum ;
2959Scanner scan =new Scanner (System .in );
3060
3161System .out .print ("Enter Hexadecimal Number : " );
@@ -34,19 +64,11 @@ public static void main(String args[])
3464// first convert hexadecimal to decimal
3565
3666decnum =hex2decimal (hexadecnum );//Pass the string to the hex2decimal function and get the decimal form in variable decnum
37-
67+
3868// convert decimal to octal
69+ octalnum =decimal2octal (decnum );
70+ System .out .println ("Number in octal: " +octalnum );
71+
3972
40- while (decnum !=0 )
41- {
42- octnum [i ++] =decnum %8 ;
43- decnum =decnum /8 ;
44- }
45- //Print the octal form of the number.
46- System .out .print ("Equivalent Octal Number is :\n " );
47- for (j =i -1 ;j >0 ;j --)
48- {
49- System .out .print (octnum [j ]);
50- }
5173 }
5274}