c++ - Unable to pass two dimensional array using double pointer as function argument

I am trying to pass a 2D-array to a function using double pointer,however the compiler is giving the following error

[Error] cannot convert 'int (*)[3]' to 'int**' for argument '1' to 'void print1(int**, int, int)

Here is the code:

#include
using namespace std;
void print1(int **arr,int r,int c);

int main()
{
    int a[2][3]={{10,20,30},{40,50,60}};


    int r=2;
    int c=3;
    print1(a,r,c);
}
void print1(int **arr,int r,int c){
    int i,j;
    for(i=0;i        for(j=0;j            cout<        }

    }
}

I want to emulate two dimensional array using double pointer.