Write a program in C to demonstrate how to handle the pointers in the program.

#include <stdio.h>

void main()

{

   int* p;

   int a;

   a=852;

   printf(” Here in the declaration p = int pointer and a as int.\n”);

   printf(” Address of a : %p\n”,&a);

   printf(” Value of a : %d\n”,a);

   p=&a;

   printf(” Now p is assigned with the address of a.\n”);

   printf(” Address of pointer p : %p\n”,p);

   printf(” Content of pointer p : %d\n”,*p);

   a=563;

   printf(” The value of a assigned to 563 now.\n”);

   printf(” Address of pointer p : %p\n”,p);

   printf(” Content of pointer p : %d\n”,*p);

   *p=1954;

   printf(” The pointer variable p is assigned the value 1954 now.\n”);

   printf(” Address of a : %p\n”,&a);

   /*as p contain the address of a, so *p changed the value of a and now a become 1563*/

   printf(” Value of a : %d\n\n”,a);

}

Output:

Here in the declaration p = int pointer and a as int.

Address of a : 0x7ffee0797354

Value of a : 852

Now p is assigned with the address of a.

Address of pointer p : 0x7ffee0797354

Content of pointer p : 852

The value of a assigned to 563 now.

Address of pointer p : 0x7ffee0797354

Content of pointer p : 563

The pointer variable p is assigned the value 1954 now.

Address of a : 0x7ffee0797354

Value of a : 1954