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C Multiple Indirection 
 

C permits the pointer to point to another pointer. This creates many layers of pointer and therefore called as multiple indirection.

 

C Multiple Indirection

                         

This section illustrates you the concept of Multiple Indirection.

C permits the pointer to point to another pointer. This creates many layers of pointer and therefore called as multiple indirection. A pointer to a pointer has declaration is similar to that of a normal pointer but have more asterisk sign before them. This indicates the depth of the pointer. You can see in the given example, we have declared an integer variable i initialized to 100. The statement int ** pt creates a pointer which points to pointer to a variable with int value. We have passed the value of i to pointer pt2 and to pass the value of pt2 to pt1, we have used the statement pt1 = &pt2; which shows the Multiple Indirection.

Here is the code:

MULTINDI.C

#include <stdio.h>
#include <conio.h>
void main() {
  int i =100;
  int **pt1;
  int *pt2;
  clrscr();
  pt2 = &i;
  pt1 = &pt2;
  printf("The value of **pt1 = %d \n The value of *pt2 = %d", **pt1, *pt2);
  getch();
}

Output will be displayed as:

Download the source code

                         

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Related Tags: c array integer size type int ai max example maximum contains exam e ax pe im in m nt xa

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