简单的c ++构造函数不起作用（非常基础）

Ok, so I've decided to read a little c++ now and then, just to get a basic understanding of the syntax. I am familiar with Java, and a little bit of Python. I have 'read' through a c++ for dummies book, and I thought I had the grip - until I tried to create the simplest class. The idea was Ok, so I've decided to read a little c++ now an