cleint11A订阅topic#################################################### server发送topic消息 ####################################################message is published completely! truedeliveryComplete---------truefalse------ratained状态 client11A接收topic消息#######
LINUX是个多用户系统,一旦连接到网络中,它可以同时为多个登录用户提供服务. 查看用户的操作 查看当前用户: [ROOT@LOCALHOST ROOT] # W 2:31PM UP 11 DAY ,21:18 4 USERS, LODE AVERAGE : 0.12, 0.09 , 0.08 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
1.查看当前登录用户 [wilsh@lcl ~]$ whatis w w (1) - Show who is logged on and what they are doing [wilsh@lcl ~]$ w 09:49:30 up 1 day, 17:19, 4 users, load average: 0.00, 0.00, 0.00 USER TTY FROM LOGIN@ IDLE JCPU
unique函数的功能是:去除相邻的重复元素(只保留一个). 函数参数:unique(first,last,compare); //first为容器的首迭代器,last为容器的末迭代器,compare为比较函数(可略写). int N ; while(cin>>N){ for(int i=1 ;i<=N ;i++) cin>>num[i] ; sort(num+1,num+1+N) ; //先排序 int M=unique(num+1,num+1+N)-(num+1) ; c