Thread: base conversion

hi there,

i'm currently writing a program to convert numbers between bases and i'm stuck in a spot. anyway, i've just truncated to the part where i'm stuck at and to simply code, values are preset here. In short, this code is suppose to convert the number 71 in base 8 to a decimal number (via Math.pow method). I don't know why it's not working as I have printed out values in intermediate steps to verify. To avoid losing values, i went on and chose instantiate product as a double (it was originally an int). The run gives product = 49.0 and 440 during the loop when it should be 1.0 and 56.0. I appreciate any feedback. Sorry about the spacing, I don't know why the editor removed the indentions.

UPDATE: found solutions, moderator please delete thread

import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("Do you want to convert /from decimal or /to decimal? (To quit type /exit)");
        String reply = scan.nextLine();
        while (!reply.equals("/exit")) {
            if (reply.equals("/from")) {
                System.out.println("Enter number in decimal system: ");
 
                int decimal = scan.nextInt();
                int remainder;
                StringBuilder converted = new StringBuilder();
 
                System.out.println("Enter target base: ");
                int base = scan.nextInt();
 
                if (base == 2 || base == 8) {
                    while (decimal > 0) {
                        remainder = decimal % base;
                        converted.insert(0, remainder);
                        decimal = decimal / base;
                    }
                } else {
                    char[] hex = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
                    while (decimal > 0) {
                        remainder = decimal % base;
                        converted.insert(0, hex[remainder]);
                        decimal = decimal / base;
                    }
                }
                System.out.println("Conversion result: " + converted);
            }
            else if (reply.equals("/to")) {
                System.out.println("Enter source number: ");
                String sourceNumber = scan.next();
                System.out.println("Enter source base: ");
                int base = scan.nextInt();
                int converted = 0;
                converted = Integer.parseInt(sourceNumber,base);
 
                System.out.println("Conversion to decimal result: " + (int) converted);
            }
            System.out.println("Do you want to convert /from decimal or /to decimal? (To quit type /exit)");
            reply = scan.next();
        }
    }
}

Can you post the steps the code should take to convert a number from on base to another?

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