C / C++ / MFC

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);