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| class Solution {
public String printBin(double num) {
StringBuilder sb = new StringBuilder("0.");
while (sb.length() <= 32 && num != 0) {
num *= 2;
int digit = (int) num;
sb.append(digit);
num -= digit;
}
return sb.length() <= 32 ? sb.toString() : "ERROR";
}
}
|
注意该题是输出二进制数，而不是 Double 对应的二进制表示。示例 0.625 = 5/8 = 0.101。
References
面试题 05.02. 二进制数转字符串