Hi Ben:

...

It could be "int, short, unsigned things even the customized type". It seems to be confirmed during compiling. In another hand, size_t is used "typedef", it is as a definition and will be confirmed during preprocessing. As a typedef, compile time, after the preprocessor.

Thanks for that. I had mistake about this before. Cheer~ 程墨 PBI―北京加维通讯电子技术有限公司 地址：北京市海淀区西北旺镇 丰智东路3号院 邮编：100094 Mail: mcheng@pbicn.com