位运算：二进制表示浮点实数

package com.atzhanyuan.java;


public class WeiYunSuan01 {
    public static void main(String[] args) {
        double num = 0.625;

        StringBuilder stringBuilder = new StringBuilder("0.");

        while (num > 0){
            double r = num * 2;

            if (r >= 1){
                stringBuilder.append("1");
                num = r - 1;
            }else {
                stringBuilder.append("0");
                num = r;
            }

            if (stringBuilder.length() > 34){
                System.out.println("ERROR");
                return;
            }
        }

        System.out.println(stringBuilder.toString());//0.101

    }
}