Ucc is a C compiler which implements the ANSI C89 standard with a few extensions. Ucc is released under BSD license. Ucc is specificaly designed for personal research and assist the undergraduate or graduate in compiler learning. We hope that Ucc will be a seedbed for new ideas and world-class optimizing techniques. Ucc's design and development goals is clear code structure,upstanding extensibility,retargetable and excellent optimization.