5.27作业

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdlib.h>
#include <iostream>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include <sys/msg.h>
using namespace std;
class msgqueue
{
	private:
		long mtype;
		char* mtext;
		int len;
	public:
		msgqueue(long num,const char* str=NULL)
		{
			if(str==NULL)
			{
				mtext=new char[1];
				len=0;
			}
			else
			{
				len=strlen(str);
				mtext=new char[len+1];
				strcpy(mtext,str);
				//创建秘钥
				key_t key=ftok("./",200);
				if(key==-1)
				{
					cout<<"ftok error"<<endl;
					return;
				}
				//更具秘钥创建一个消息队列
				int msgid = msgget(key,IPC_CREAT|0664);
				if(msgid ==-1)
				{
					cout<<"msgget error"<<endl;
					return;
				}
				mtype=num;
				msgsnd(msgid,&mtext,len,0);
				cout<<mtext<<endl;
			}
		}
		/*~msgqueue(){
		msgctl(msgid,IPC_RMID,NULL);
		}*/

};
int main(int argc, const char *argv[])
{
	msgqueue msg(1,"hello");

	return 0;
}