Merge pull request ashutosh97#118 from martinezhenry/master

Added Octal Decimal Calculator

Author: ashutosh97

Octal Decimal Calculator/Octal Decimal Calculator.txt

@@ -0,0 +1,9 @@
+Given an octal number it is required to convert to decimal and print it on the console
+
+Example:
+
+The octal number 567 is entered.
+
+The system calculates the equivalent number in decimal that is 375 and prints it on the console
+
+The decimal number for octal 567 is: 357

Octal Decimal Calculator/OctalDecimalCalculator.java

@@ -0,0 +1,43 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class OctalDecimalCalculator {
+
+    private static int BASE_8 = 8;
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final String RESULT_TEMPLATE = "The decimal number for octal %s is: %s";
+
+    public static void main(String[] args){
+
+        System.out.println("Please input octal number to convert");
+        try {
+            String octal = br.readLine();
+            String decimal = convertOctalToDecimal(Integer.parseInt(octal));
+
+            System.out.println(String.format(RESULT_TEMPLATE, octal, decimal));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    public static String convertOctalToDecimal(int octal){
+        int result = 0;
+        String tmp =  String.valueOf(octal);
+        int count = 0;
+        int multiple;
+        String caracter;
+        for (int i = tmp.length(); i > 0; i--) {
+            caracter = tmp.substring(i-1, i);
+            multiple = (int) Math.pow(BASE_8, count);
+            int value = (Integer.parseInt(caracter) * multiple);
+            count = count + 1;
+            result += value;
+
+        }
+
+        return String.valueOf(result);
+    }
+
+}