a small help here

hello guys,
i had a little problem in understand the pointer to pointer reference concept (i.e **p) how it is used. and what is the effect of uisng that.

any help will be appreciated
:)

Try reading through this post. It was discussed decently there. Let me know if you have any questions.

Think of **p as p[][]. A multidimensional array (even though technically it's not).

Code:

---

const char **p = {
    "Apples",
    "Cornbread"
};

// p[] would carry the strings
// p[][] would carry the characters of the strings

// *p would carry the strings
// **p would carry the characters of the strings

p[0][0] = 'B' // Change Apples to Bpples
**p = 'C'      // Change Bpples to Cpples

---

Does any of that work?
I very much doubt it.

You mean because of const, or because they're string literals. Or both. ;)

Quzah.

This is crazy horse !

Code:

---

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main( void )
{
  // Create a string array
 
  char p[2][100];

  // Copy the strings into the string array

  strncpy( p[0], "Apples", sizeof( *p ) );
  strncpy( p[1], "Corn Bread", sizeof( p[0] ) );

  // Next is the same thing as:
  // **p = 'B'
 
  p[0][0] = 'B'; // Change Apples to Bpples
  puts( p[0] );

  // Next is the same thing as:
  // p[1][5] = 'X'
 
  *( ( *( p+1 ) )+5 ) = 'X';      // Change Corn Bread to Corn Xread
  puts( p[1] );

  return 0;
}

---