大三学习C#的时候编写的一个计算器程序，对于学习C#的人应该有所启发，不过只要C语言学得好，一个计算器程序写出来应该没有问题。-Junior year, when learning C# a calculator program written for learning C# people should be inspired, but as long as C Linguistics well, a calculator program written should be no problem