在命令

代码说明：

在linux下完成联机指令系统的设计与实现，要求实现账户管理接口，业务受理接口，业务竣工接口，余额查询接口，业务充值接口。程序要求运行稳定，在此基础上，在内存占用，运行效率上进行改进。-In the linux command-line system to complete the design and implementation requirements to achieve account management interface, the business receiving interface, the business completed interface, balance inquiries, interfaces, business Result interface. Procedural requirements for stable operation, on this basis, in the memory footprint, run efficiency improvements.