C++ LANGUAGE USING POINTERS

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C++ LANGUAGE USING POINTERS

Using Pointers in C++ 


There are few important operations, which we will do with 
the pointers very frequently. (a) We define a pointer variable. 
(b) Assign the address of a variable to a pointer. 
(c) Finally access the value at the address available 
in the pointer variable. This is done by using unary operator 
* that returns the value of the variable located at the address 
specified by its operand. Following example makes use of these operations: 

#include <iostream> 
 
using namespace std; 
 
int main () 
{ 
   int  var = 20;   // actual variable declaration. 
   int  *ip;        // pointer variable  
 
   ip = &var;       // store address of var in pointer variable 
 
   cout << "Value of var variable: "; 
   cout << var << endl; 
 
   // print the address stored in ip pointer variable 
   cout << "Address stored in ip variable: "; 
   cout << ip << endl; 
 
   // access the value at the address available in pointer 
   cout << "Value of *ip variable: "; 
   cout << *ip << endl; 
 
   return 0; 
} 
When the above code is compiled and executed, it produces result something as follows: 
Value of var variable: 20 
Address stored in ip variable: 0xbfc601ac 
Value of *ip variable: 20