定时器1秒钟定时实例,可以在各种需要时间记录的程序中调用-Examples of Timer 1 second from time to time, you can record in a variety of procedures will take time to call

测验者的成绩存放在硬盘上的record文件中，如删除该文件后，则调用系统运行时会初始化该文件，并设置初始的测验者姓名和测验分数。 paper1.txt、paper2.txt、paper3.txt、paper4.txt是系统设置的四份测验试卷。只可修改内容，不可删除。 -Test results are stored in the record file on the hard disk, such as delete the file, then the call is initiali

在keil开发环境下，用AT89S52做主控制器对外界温度值进行检测，并通过串口上传到PC中，查看温度计录，可作毕业设计，内附有电路图 Proteus 软件进行模拟-In keil development environment, using AT89S52 call the shots on the external temperature controller to detect and uploaded to the PC via serial port, view the thermom