格子波尔兹莫程序入门程序，LBM,驱动流，这个例子很简单，但是是很经典的例子，多学习这个例子可以达到举一反三的效果，这个程序是用c++编写，可以方便的转化为其他格式的程序-This example is very simple, but it is a classic example, learn more examples of this can achieve the same effect, the program is written in c++, can be easily conv