2017 new stocks

, distributed, robust, security, architecture-neutral, portability, interpretive, high-performance, multi-threading, dynamic language." So, Java is worthy of our learning. In the first chapter, we summarize the different performance of Java and other programming languages, and we have a preliminary understanding of Java. The second chapter discusses in detail how to download and install the Java Development Toolkit JDK and how to compile and run various types of programs: console programs, graph

PKU Helper 2017 Development Group Recruit new Topic answer T1 Implement a SQRT function yourself, accept a floating-point variable, return the square root of its arithmetic, and return the result to be equal within the error range of 1e-6. The language native SQRT library function must not be invoked. Using Newton iterative method to implement SQRT function, compared to the general binary search method

1. [Programming questions] Buy hats Time limit: 1 seconds Space limit: 32768K degree bear wants to go to the mall to buy a hat, there are n hats in the mall, some hats may be the same price. The degree bear wants to buy a third-cheapest hat and ask the price of the third-cheapest hat.Enter a description: First enter a positive integer n (n Output Description: If there is a third cheap hat, please output this price is how much, otherwise output-1 Enter an example: 10 10 10 10 20 20 30

Apache and IIS I do not introduce, because the use of the same way!!The first is the port mode, with the port to distinguish between different PHP site, is the latest Nginx site management port mode, please note the figure of the distinction (domain name mode and port mode can be mixed) Then is the domain name mode, the domain name mode needs to modify the main interface to 80 ports, and then all the ports inside the site to be set to 80, and finally generated host can be used to distinguish