Pointer Representation and Pointer Example Programs

Pointer Definition

• The pointer is a programming language data type whose value refers directly to (or "points to") another value stored elsewhere in the computer memory using its address.

Accessing The Address:

• & - Locate the Variable Address 
• &variable 
• ponter_variable = &variable; 

Pointer Representation

// Example program for Pointer Representation 
#include<stdio.h> 
#include<conio.h> 
void main() 
{ 
	int i=10; 
	printf("\nValue Of i :%d",i); 
	printf("\nAddress Of i :%d",&i); 
} 

Declaring Pointer Variables

• * and variable name 
• pointer variable points to a variable of type data_type 

Pointer Syntax:

data_type *pt_name; 

Pointer Syntax Example:

int *p; 
float *x; 

Initialization Of Pointer Variable:

pointer_vaibale = &variable; 

Pointer Example program: 1

// Pointer Representation Example Program : 1
#include<stdio.h> 
#include<conio.h> 
void main() 
{ 
	// Declaring Variables
	int i=10; 
	int *Ptr; 
	
	// Assigning Pointer
	Ptr=&i; 

	/ Printing Values of Pointer
	printf("\nValue Of i :%d",i); 
	printf("\nAddress Of i :%d",&i); 
	printf("\nValue Of Ptr :%d",Ptr); 
	printf("\nAddress Of Ptr :%d",&Ptr); 
	printf("\nPtr's Pointer Value:%d",*Ptr); 
	printf("\nPtr Equal to &i :%d",*(&i)); 
} 

Pointer Example Program: 2

// Pointer Representation Example Program : 2
#include<stdio.h> 
#include<conio.h> 
void main() 
{ 
	// Declaring Variables and Pointer
	int i=10; 
	int *Ptr; 
	Ptr=&i; 

	// Printing Values of Pointer
	printf("\nValue Of i :%d",i); 
	printf("\nAddress Of i :%d",&i); 
	printf("\nValue Of Ptr :%d",Ptr); 
	printf("\nAddress Of Ptr :%d",&Ptr); 
	printf("\nPtr's Pointer Value:%d",*Ptr); 
	printf("\nPtr Equal to &i :%d",*(&i)); 

	// Change Values of Using Pointer
	printf("\n\nWe Can Change Value Of i,Without Using i"); 
	*Ptr=100; 
	printf("\nValue Of i :%d",i); 
	printf("\nAddress Of i :%d",&i); 
	printf("\nPtr's Pointer Value:%d",*Ptr); 
	getch(); 
}

C Pointer Example Programs

• Simple Pointer Example Program
• Simple Program for Print address of Variable Using Pointer in C
• Pointer Simple Example Program with Reference operator (&) and Dereference operator (*)
• Simple Example Program for Swap Numbers Using Pointers In C
• Print size of different types Using Pointer in C
• Simple Program for Add Two Numbers Using Pointer in C
• Simple Program for Increment and Decrement Integer Using Pointer in C
• Simple Program for Increment and Decrement Floating Point Using Pointer in C
• Simple Program for Find a difference between two Numbers Using Pointer in C
• Simple Program for Change the value of constant integer Using Pointer in C
• Simple Program for Print String Using Pointer in C
• Simple Program for Count vowels String Using Pointer in C
• Simple Program for Length of String Using Pointer In C
• Pointer to Pointer or Double Pointer Example Program In C
• Simple Program for Pointer and Array Example in C
• Simple Program for Sum of Integer an array using pointers in C
• Simple Program for Read, Print, and Sum of Integer in an array using pointers in C
• Simple Example Program for Passing pointers to functions In C
• Simple Example Program for Area Of Circle Using Pointer In C

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