全国计算机二级等级考试c语言考前的训练题，对初学c语言的你如果想过二级，可以试试笔！-C language exam for secondary level examination of the National Computer Training Problems beginner c language, if you think about the two, you can try the pen!

关于安卓系统设计的计算器代码，有加减乘除简单的几个运算-About the android design calculator code, simple several operations are addition, subtraction, multiplication, and division