获取操作系统CPU、内存、磁盘使用情况的实用进程代码，支持Linux、AIX、HPUX，原创-Access to the operating system CPU, memory, disk usage utility process code to support Linux, AIX, HPUX, original

C语言实现，可用于linux下获取系统的某一个指定进程的CPU占用率和内存占用率。-C language, can be used to obtain a specified system process CPU utilization and memory usage under linux.