C / C++ / MFC

//CPort_Class handels all port operation like open/Close and read and write

//CAppClass its a main appclass

void CAppClass::fun1()
{
  for(int i=0; i<port_count;i++)
  {
    CPort_Class* p_c=new CPort_Class;
    p_c->Open()
   
    //some working

    p_c->Close();
  }
}

CPort_Class *ports = new CPort_Class[portcount]
for (int port = 0; port < portcount; port++) ports[port].Open();
...
//now you have an array of ports that are opened simulteniously, do what you need with them
...
for (int port = 0; port < portcount; port++) ports[port].Close(); //you could put a call to Close() in
                                                                  //the destructor of this class possibly
delete []ports;

unsigned char (*main_data)[MAD_BUFFER_MDLEN];  is somewhat equivalent to:

unsigned char **main_data;  

#include <stdio.h>


int main(void)
{
    char (*ptr)[40];

    ptr = malloc(40);

    // some code...
    
    free(ptr);

    return 0;

}

*ptr = (char*)malloc( sizeof(char*) * 40 );

Richard Andrew x64 wrote:

I think this is an array of unsigned char pointers.

void fun(char (*p)[10])
{
    cout << *p << endl;    // Will output Hello
}

char name[10];
strcpy_c(name, "Hello");
fun(&name);

char name[11];    // Wrong size
strcpy_c(name, "Hello");
fun(&name);

void fun(char (&r)[10])
{
    cout << r << endl;    // Will output Hello
}

char name[10];
strcpy_c(name, "Hello");
fun(name);

char name2[11];    //Wrong size
strcpy_c(name2, "Hello");
fun(name2);    // Compile time error

char (*p)[10] = new char[5][10];

void fun(char (**p)[10]){}
fun(&p);

void fun(char (*&p)[10]){}
fun(p);