C Program to Show How to Handle Pointers

If you have ever found yourself puzzled by pointers, don't worry; you are not alone because pointers might sound tricky. But fear not! In this post, we are going to explore the basics of handling pointers in C through a simple and easy-to-follow program which shows how to handle pointers in C language.

  Step by Step logic of the given program:

1. First declare integer pointer variable a, declare integer variable z assign z=10.

2. Print value of z and address of z using &z.

3. After that assign a with address of z using:

a=&z;

4. Print address of pointer a using %p. It prints the address of z because we already stored address of z in variable a.

5. After that print content of pointer a using *a  it will print value of z=10.

6. After that assign z=30.

7. Print address of a using %p it will print address of z as it is. After that print content of pointer a using *a it will print changed value of z that means it will print 30.

8. After that assign value 5 to the pointer variable *a. Then print address of z and print value of z it will print value 5 because a contain the address of z.

  Program to Show Working of Pointers:

#include<stdio.h>

int main()

{

int* a;

int z;

z=10;

printf("How works pointer and how to handle pointers-C program:\n\n");

printf("Value of z = %d\n",z);

printf("Address of z = %p\n",&z);

a=&z;

//Now, a is assigned with the address of z.

printf("\nNow a is assigned with the address of z:\n");

printf("Address of pointer a = %p\n",a);

printf("content of pointer a = %d\n\n",*a);

z=30;//now value of z is 30

printf("Now, The value of z assigned to 30:\n");

printf("Address of pointer a = %p\n",a);

   printf(" Content of pointer a = %d\n\n",*a);

    *a=5;

   printf("Now, pointer variable a is assigned the value 5\n");

   printf("Address of z = %p\n",&z);

   /*here, a contain the address of z, so *a changed the value of z (now z=7)*/

   printf("Value of z = %d",z);

   return 0;

}

Above program shows the following output:

You can explore more examples of pointers 👉 Here..