打印从1到1000的整数，无循环，不判断

http://heikezhi.com/yuanyi/printing-1-to-1000-without-loop-or-conditionals

http://stackoverflow.com/questions/4568645/printing-1-to-1000-without-loop-or-conditionals

http://blog.csdn.net/yseternalxuan/article/details/7447383