Some minor issues during development

1. line feed and carriage return

 

"/R/n" in windows, press ENTER + line feed, "/n" in UNIX, and "/R" in Mac ".

 

If there is only "/N", a black dot will be displayed in windows without line breaks.

 

The reason is that in the printer era, since it takes 0.2 seconds to print a line feed, data will be lost in these 0.2 seconds, and a two-byte line feed will be sent to complete the line feed.

 

In 2 C ++. And->

 

Is the object instance to get the member variable.

-> Is the object pointer used to obtain member variables. This is a pointer. It is wrong to write this. member in the constructor, And the C-free compiler cannot compile it anyway.

Error: Request for member 'm1 'in' this ', which is of non-class type 'a * const'