…

int    exterint[5][5];

int    exterint1[5];

…

int **temp1;

int *temp2;

….

temp2=exterint1; //*****

temp1 = exterint;  //xxxxxxxxx    “ERROR GIVING LINE”

 

In the above case exterint1 will be pointing to the first element of the 
integer array, so it can be assigned to a integer pointer.

 

So the assignment 

temp2=exterint1;   is correct.

 

While in case of exterint , it will be pointing to the first element to the 
first row , again its pointing to a integer not a pointer to the integer while 
temp1 is a pointer to the pointer to an integer.

 

So the assignment  

 temp1 = exterint   gives an error.

Thanks & Regards,

Saquib Imam

  _____  

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Cihan Kömeçoglu
Sent: Monday, December 24, 2007 4:26 PM
To: [EMAIL PROTECTED]
Cc: kernelnewbies@nl.linux.org
Subject: Re: Question about double pointers assignment

 

I think , the problem is there

 

temp1 = exterint

 

temp1 is pointer to pointer,not pointer to int but you assigned adress of 
exterint1 and this array of integer; not array of pointer.

For example like this give you same warning:

 

int * temp1;

int a;

temp1 = a; 

Warrning:“assignment from incompatible pointer type

 

This is correct if you do like below

 

int *temp1

int exterint[5];

 

temp1 = exterint;

 

Monday, December 24, 2007, 11:49:37 AM, you wrote:

 


> 

Dear all:

I write a program like below:

 

#include<stdio.h>

#include<stdlib.h>

int    exterint[5][5];

int    exterint1[5];

int main(void){

    int index0, index1;

    int **temp1;

    int *temp2;

    temp2=exterint1; //*****

    temp1 = exterint;  //xxxxxxxxx

…..

…..}

 

The compiler will warn me that at line marked as xxxxx is “assignment from 
incompatible pointer type.”

But “******” doesn’t get any warning.

 

Is there any restriction about assigning multi-layer array or something about 
pointer I miss?

 

Appreciate your help,

cckuo

 

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