程序说明： 1:多用户系统 2:商品分类支持多级； 3:支持IPAY 在线支付系统和银行转账； 4:功能完整，可以收藏，EMAIL推荐给好友，在线充值，银行转账 具体功能见演示-procedures Note : 1 : Multi-User System 2 : Commodity Classification support multi-level; 3 : support IPAY online payment systems and bank transfers; 4 : functio

Multi-level queue 196 scheduling algorithm is used in scenarios where the processes can be classified into groups based on property like process type, CPU time, IO access, memory size, etc. One general classification of the processes is foreground pr