Question

I have the following source:

#include <iostream>
using namespace std;

void main(int j)
{
    char arr[10][10];
    char** ptr;
    ptr = arr;
}

when I compile it using VS2010 I get this error:

error : a value of type "char (*)[10]" cannot be assigned to an entity of type "char **"

I thought arrays in c++ were just pointers. So a char[][] could also be char**. What am I doing wrong?

Answer 1

The types char[10][10] and char** and char (*)[10] are all different types. However, the first one cannot convert into the second one, it can convert into the third one.

So try this:

char arr[10][10];
char (*ptr)[10];
ptr = arr; //ok

It will work, because as I said object of type char[10][10] can convert into an object of type char (*)[10]. They’re compatible types.