1.创建如下mysql脚本 drop table if exists book_info; create table if not exists book_info( book_id ) primary key auto_increment, book_name ) not null, book_author ) not null, book_publish ) not null, book_page ) not null, book_price ,) not null, creation_ti
0. math & code COME ON CODE ON | A blog about programming and more programming. 1. 中文 统计学Computational Statistics in Python 线代启示录 2. 英文 数学证明的维基百科:Pr∞fWiki Wolfram|Alpha: Computational Knowledge Engine:工具网站,自然科学搜索的,可以帮你画图.积分.求解等: Mathematics Stack Exc
概述 平方根倒数速算法,是用于快速计算1/Sqrt(x)的值的一种算法,在这里x需取符合IEEE 754标准格式的32位正浮点数.让我们先来看这段代码: float Q_rsqrt( float number ) { long i; float x2, y; const float threehalfs = 1.5F; x2 = number * 0.5F; y = number; i = * ( long * ) &y; // evil floating point bit level hac