java - 如何使用for循环将十进制转换为二进制？

Question

/* This program converts decimal to binary */

import javax.swing.JOptionPane;

public class BinaryLoop {
public static void main(String []args) {

    String askForDecimal = JOptionPane.showInputDialog("Enter the decimal number you would like to convert?");
    int decimalNumber = Integer.parseInt(askForDecimal);

    int remainder = 0;
    for (int i = 1; decimalNumber > 0; i++) {

            decimalNumber /= 2;
            remainder = decimalNumber % 2;
            System.out.print(remainder);
        }

    }
}

例如，我输入 15，但它返回 1110，本应是 1111。 附注结果将从右向左读取。

Answer 1

decimalNumber /= 2;
remainder = decimalNumber % 2;

这两行的顺序应该相反。你能明白为什么吗？