5.2 Given a real number between 0 and 1 (e.g., 0.72) that is passed in as a double, print the binary representation. If the number cannot be represented accurately in binary with at most 32 characters, print "ERROR."
[CareerCup] 5.2 Binary Representation of Real Number 实数的二进制表示
原文：http://www.cnblogs.com/grandyang/p/4721047.html