实现对二进制文件的操作，全部写为0 ；是VC++操作文件读写的一个简单例子； 本例子中的功能是将一个bin文件内容全写为0；(To achieve the operation of binary files, all written as 0; is a simple example of VC++ operation file read and write; The function of this example is to write the contents of a bin fil