what value of 2 pi

1 start with const int IYou know, when declaring a variable, int I is like this; this I may be re-assigned to it. As follows:Int I = 0;//...I = 20; // The value is assigned again here.However, one day my program may need such a variable (temporarily

In the previous article, the array name is a constant pointer.Reference: http://blog.pfan.cn/whyhappy/5164.htmlConst int * pi, int const * pi and int * const pi and their operations1 start with const int IYou know, when declaring a variable, int I

Many people are interested in Raspberry Pi's hardware hack function, one thing I see is Raspberry Pi's low power consumption function. I can use it to replace the Linux Server currently in use. In my previous articles, I have introduced how to use

Build a Qt cross-compiling environment for Raspberry Pi 2B and Raspberry Pi 3 The lab project needs to use Qt to develop a user interaction interface on Raspberry Pi. Although Raspberry Pi's hardware configuration is constantly improved with version

First, pre-preparationReach the goal:Using Rapberry Pi to drive MQ-2 smoke Alarm module, the information is collected and extracted, and then Zabbix monitoring system to collect and process information collected.1. Prepare the Raspberry Pi

Sigrity provides a wide range of Ge-bit signal and power network analysis technologies, including unique signal integrity analysis functions for systems, printed circuit boards (PCB) and IC packages. The combination of sigrity Analysis Technology

π is a truly magical number followed by countless people. I am not very clear about the fascinating point of an irrational number that is always repeated. In my opinion, I am happy to calculate π, which is the value of pi. Because π is an irrational

In the use and development of Raspberry Pi, you may often need some hardware and sensors to support your development work, for example, add an ultrasonic ranging module to allow your Raspberry Pi to have ranging function, add a temperature

ext.: http://bbs.xiaomi.cn/thread-7797152-1-1.html In the use and development of Raspberry Pi, you may often need some hardware and sensors to support your development work, for example, add an ultrasonic

0 environmentLinux hosts os:ubuntu14.04 64-bit, running on WMware workstation 10 virtual machinesRaspberry Pi Version: Raspberry Pi 2 Type B.Raspberry Pi Os:debian Jessie Raspbian Jessie1 Raspberry Pi Start-up processThe boot process of the