说明：  C参考大全(第四版)，英文完整版。 Herbert Schildt著，详细描述了C库函数，使用例子，C99与C89的区别等
(C Reference Encyclopedia (Fourth Edition), English full version. Herbert Schildt, and a detailed description of the C library function, use the example, C99 and C89, such as the distinction between)