OpenMP中并行嵌套的应用，使用nested语句在并行语句中实现并行的嵌套。-OpenMP parallel nested applications

由ＳＵＮ公司提供的ｏｐｅｎｍｐ用户手册，包含详细的接口函数用法与解释，嵌套并行操作，Ｆortran 中的自动作用域，实现定义的行为等。-Provided by the SUN company openmp user manual includes detailed usage and interpretation of interface functions, nested parallelism, Fortran automatic scope, implementation-defined