操作系统中的页面调度(先进进出,最近很少使用算法,最佳算法等等,操作系统中比较重要的算法)-operating system pages Scheduling (advanced access, recently rarely used algorithm, the best algorithms and so on the operating system more important algorithm)
另外一个关于表达式求值的程序,功能强大,可以计算带有次方的表达式 ,而且可以先输入字母,再对字母赋值-A program which can calulate the value of a expression, it owns powerful function, and can calculate the expression which has limited power, also it can input letters firstly,then assign value towards letters.