dev-cpp-users

[Dev-C++] Doble pointer

[Esteban V. <est...@ho...>]

Hi, I can do this:

int array [ N ];
int *p = array;

but I can't do this:

int matrix [ M ] [ N ];
int **q = matrix;

An "suspicius pointer conversion" warning message appear and the program
halts when I run it. Why can't do this assigment ?


------------------------------------------------
Esteban Valverde
est...@ho...

RE: [Dev-C++] Doble pointer

[Ioannis V. <iv...@at...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Esteban Valverde
> Sent: Tuesday, April 29, 2003 4:22 PM
> To: dev-cpp
> Subject: [Dev-C++] Doble pointer
> 
> 
> Hi, I can do this:
> 
> int array [ N ];
> int *p = array;
> 
> but I can't do this:
> 
> int matrix [ M ] [ N ];
> int **q = matrix;
> 
> An "suspicius pointer conversion" warning message appear and 
> the program
> halts when I run it. Why can't do this assigment ?


Because that is a pointer to pointer. You need a pointer to array, that is:

int (*q)[N]=matrix;

or

int (*q)[N]=&matrix[0];



Ioannis Vranos
 
* Programming pages: http://www.noicys.freeurl.com
* Alternative URL 1: http://run.to/noicys
* Alternative URL 2: http://www.noicys.cjb.net


Anti-racism movement: http://www.positive-youthfoundation.org
Iraq Peace Pledge: http://www.peacepledge.org

Re: [Dev-C++] Doble pointer

[Ricardo R. <ri...@un...>]

It seems that you can find an alternative solution,

for instance in your case:

***************************
#define N 2
#define M 3

int main()
{
  int matrix [ N ] [ M ];
  int *q = matrix[0];

  matrix[1][0]=8;
  cout << matrix[1][0] << *(q+3);

      system("PAUSE");
      return 0;
}
**************************