Merge pull request TheAlgorithms#316 from The-TJ/patch-1

varunu28 · web-flow · commit 6efaddb5ef7c · 2017-12-06T07:09:21.000-08:00
Add Hexadecimal to Octal
diff --git a/Conversions/HexToOct.java b/Conversions/HexToOct.java
@@ -0,0 +1,74 @@
+/**
+ + * Converts any Hexadecimal Number to Octal 
+ + * 
+ + * @author Tanmay Joshi
+ + *
+ + */
+import java.util.Scanner;
+
+public class HexToOct
+{ 
+	/**
+ +	 * This method converts a Hexadecimal number to
+ +	 * a decimal number
+ +	 * 
+ +	 * @param The Hexadecimal Number
+ +	 * @return The Decimal number
+ +	 */ 
+    public static int hex2decimal(String s)
+    {
+             String str = "0123456789ABCDEF";  
+             s = s.toUpperCase();
+             int val = 0;
+             for (int i = 0; i < s.length(); i++)
+             {
+                 char a = s.charAt(i);
+                 int n = str.indexOf(a);
+                 val = 16*val + n;
+             }
+             return val;
+    } 
+	
+	/**
+ +	 * This method converts a Decimal number to
+ +	 * a octal number
+ +	 * 
+ +	 * @param The Decimal Number
+ +	 * @return The Octal number
+ +	 */ 
+	public static int decimal2octal(int q)
+	{
+		int now;
+		int i=1;
+		int octnum=0;
+		while(q>0)
+		{
+			now=q%8;
+			octnum=(now*(int)(Math.pow(10,i)))+octnum;
+			q/=8;
+			i++;
+		}
+		octnum/=10;
+		return octnum;
+	}
+	// Main method that gets the hex input from user and converts it into octal.
+    public static void main(String args[])
+    {
+        String hexadecnum;
+        int decnum,octalnum;
+        Scanner scan = new Scanner(System.in);
+		
+        System.out.print("Enter Hexadecimal Number : ");
+        hexadecnum = scan.nextLine();      
+        
+        // first convert hexadecimal to decimal
+        
+        decnum = hex2decimal(hexadecnum);       //Pass the string to the hex2decimal function and get the decimal form in variable decnum
+		
+        // convert decimal to octal
+        octalnum=decimal2octal(decnum);
+	System.out.println("Number in octal: "+octalnum);
+ 
+        
+    }
+}
