小编Adr*_*iak的帖子

我想在构造对象时在结构中启动数组的大小:

class someclass{
public:
  someclass(int init_msgsz) { this->msgsz = init_msgsz; }

private:
   int msgsz;
   struct msgbuf {
      long msqtype;
      uint8_t msgtext[msgsz];
   } send_message_buf, receive_message_buf;
};

但有些事情是错的:-(任何人都帮帮我？
注意这个结构来自:msgrcv,msgsnd - 消息操作

更新:

#include <iostream>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <stdint.h> //uint8_t == unsigned char
#include <string.h>

class communication
{
public:
    communication(key_t &init_key, int &init_msgflg, size_t init_msgsz);
    ~communication();

    int send_msg(uint8_t *send_msg);
    int receive_msg(uint8_t *rec_msg);

private:
    int msqid;
    key_t key;
    int msgflg;
    int msgsz;
    size_t buf_length;

    struct msgbuf {
        long    msqtype; …