一个很实用的智能大厦报警系统 ,请各位研究者多学习下 ,很有用处的-A very practical and intelligent building alarm system, please learn more researchers, the very useful

C++ 时钟类的实现，闹钟功能。程序可以自动获取系统时间，也可用户自己设置时间。闹钟通过蜂鸣实现，-Achieve C++ clock class, alarm clock function. Program can automatically obtain the system time, the user can also set up their own time. Achieved by beep alarm,

Duck公司在仓库安装了红外报警装置，如图所示，所有红外线互不相交。n个发射器和n个接收器将平面分成n+1个区域，从左到右分别记作0、1、…、n。现在技术人员正在进行调试，对于每个点，需要快速知道它处于哪个区域。若正好处于红外线上，则视为处于右边的区域。-Duck in the warehouse infrared alarm system installed, as shown, all infrared disjoint. n transmitters and receivers n n+1