主题：用g++编译的c++程序怎样引用外部类的static 变量？ -- 金口玉言

The classical textbook on C programming language is Kernighan and Ritechie (K&R), The C Programming Language, 2nd edition. The official website is 外链出处.

For free download, try 外链出处. Click on the category: C.

The exercise problems are very good and worth of doing.

For the compiler, a very easy-to-use one is Bloodshed Dev C++ compiler 外链出处.

It's IDE and should be sufficient for doing the problems in K&R. If you need to compile and link several files together, GNU gcc is better. You can download it at 外链出处 .