有交互界面的一款可以进行的符号函数运算，简单排序，简单矩阵加减乘运算，自编的软件的源代码-There are interactive interface can be a function of operator symbols, simple sorting, simple addition and subtraction matrix multiplication, written and directed the software' s source code

实现一个简单的随机数生成程序,利用rand（）函数，有界面-a progrom which used for produce a random

面向对象程序设计，简单的登陆界面，有缺陷-Object-oriented programming, a simple login screen, defective

逐步回归计算源码：从给定样本数据中获取多元回归函数，并输出计算过程中的关键信息以供查验，本方法侧重回归函数实现，普通界面，内有模块调用实例，简单易学，方便自用。如果感觉好，谢谢支持！-Stepwise regression the calculation source: Get multiple regression function from the given sample data and output during the calculation of the critical info