Example : A simple C++ program to display the address of the variables without using pointer.
#include <iostream>
using namespace std;
int main() 
{
    int num;	
    num=10;
    cout<<"Address of variable is = "<<&num<<endl;
    return 0;
}

Output :
Address of variable is = 0x6ffe1c

---------  OR  ----------
#include <iostream>
using namespace std;

class A 
{
  	int num1,num2;
	public:
	void input()
	{
	   num1=10;num2=20;
	   cout<<"Address of variable are = "<<&num1<<" and "<<&num2<<endl;
	}
};
int main() 
{
        A a;
  	a.input();
	return 0;
}
Output :
Address of variable are = 0x6ffe10 and 0x6ffe14
Example : A C++ program to display the address of the array elements/variables using Array Act as Pointer concept (without using pointer).
#include <iostream>
using namespace std;	

       int main()
       {
            int arr[5];    
    	    cout<<"Array Variables Address are : "<< endl;
    	    for (int i = 0; i < 5; i++) 
		{
        	cout << arr + i <<endl;
    		}    
    	    return 0;
	}

Output :
Array Variables Address are :
0x6ffe00
0x6ffe04
0x6ffe08
0x6ffe0c
0x6ffe10
Example : A simple C++ program to display the address of the integer and float variables with the help of integer and float pointer.
#include <iostream>
using namespace std;

int main() 
{
    int x=10;
    float y=10.20;
    
    int *ptr1;
    float *ptr2;    
    
    ptr1 = &x;
    ptr2= &y;
	
    cout <<"The address of integer value is = "<< endl ;    
    cout << &x << endl;
    cout <<ptr1<< endl;
    
    cout << endl << endl;
    
    cout <<"The address of float value is = "<< endl;
    cout << &y << endl;
    cout << ptr2<< endl;   
    
    return 0;
}
Output :
The address of integer value is = 0x6ffe0c
0x6ffe0c

The address of float value is = 0x6ffe08
0x6ffe08
Example : A simple C++ program to display the address of the variables with the help of pointer/WILD pointer.
#include <iostream>
using namespace std;

int main() 
	{
       	int num;
	int *ptr;    //wild Pointer
	
	num=10;
	ptr=#

	cout<<"Address of variable is = "<<&num<<" and "<<ptr<<endl;
		 
	return 0;
	}

Output :
Address of variable is = 0x6ffe14 and 0x6ffe14.

---------  OR  ----------
#include <iostream>
using namespace std;

class A 
{
  	int num1,num2;
	public:
	void input()
	  	{
	     	int num;
		int *ptr;
				
	   	num=10;
	   	ptr=#
	   		
		cout<<"Address of variable is = "<<&num<<" and "<<ptr<<endl;
	  	}
};

int main() 
	{
        A a;
  	a.input(); 	   	
  		
	return 0;
	}
Output :
Address of variable is = 0x6ffe14 and 0x6ffe14.
Example : A simple C++ program to display the address of the any variables with the help of VOID pointer.
#include <iostream>
using namespace std;

int main() 
{
    void *ptr;
    
    int x=12;
    float f = 3.141;
    
    ptr = &x;     
    cout << &x << endl;
    cout << ptr;
    
    cout << endl << endl;
    
    ptr = &f;     
    cout << &f << endl;
    cout << ptr;
    
    return 0;
}
Example : A C++ program to display the concept of NULL pointer.
#include <iostream>
using namespace std;
int main() 
{
    int *ptr = NULL;     // Null pointer declaration having no address stored in it. 
    cout<<"The address stored by ptr is = "<<ptr;    
    return 0;
}
Output :
The address stored by ptr is = 0
Example : A C++ program to display the concept of THIS pointer.
#include <iostream>
using namespace std;
class Example 
{
	private:
  	int num;
  	char ch;
  	
	public:
  	void input(int num, char ch)
  	{
           this->num =num;
           this->ch=ch;
  	}
  	
  	void display()
  	{
           cout<<num<<endl;
           cout<<ch;
  	}
};

int main()
{
  Example obj;
  obj.input(50, 'R');
  obj.display();
  return 0;
}

Output :
50
R
Example : A C++ program to display the array elements with the help of pointers.
#include <iostream>
using namespace std;

int main()
{
   int *ptr;   
   int arr[]={12, 82, 43, 40, 75, 62};  
   ptr = arr;
   for(int i=0; i<=5;i++)
   {
     cout<<*ptr<<" ";     
     ptr++;
   }
   return 0;
}
Output :
12 82 43 40 75 62
Example : A C++ program to display the address of array elements with the help of both array and pointers.
#include <iostream>
using namespace std;

int main()
{
    int x[5];
    int *ptr;
    
    cout << "The Address of Array Elements using Array Address Operator = " << endl;
    for (int i = 0; i < 5; i++)
    {
        cout << " Address of x[" << i << "] = " << &x[i] << endl;
    }
    
    cout << "\nThe Address of Array Elements using Array(that act as Pointer itself) = " << endl;
    for (int i = 0; i < 5; i++)
    {
        cout << "Address of x[" << i << "] = " << x+i << endl;
    }
    
    ptr = x;
    cout<<"\nThe Address of Array Elements using Pointer =  "<< endl;
    for (int i = 0; i < 5; i++)
    {
        cout << " Address of x[" << i << "] = " << ptr + i << endl;
    }
    return 0;
}
Output :
The Address of Array Elements using Array Address Operator =
 Address of x[0] = 0x6ffde0
 Address of x[1] = 0x6ffde4
 Address of x[2] = 0x6ffde8
 Address of x[3] = 0x6ffdec
 Address of x[4] = 0x6ffdf0

The Address of Array Elements using Array(that act as Pointer itself) =
Address of x[0] = 0x6ffde0
Address of x[1] = 0x6ffde4
Address of x[2] = 0x6ffde8
Address of x[3] = 0x6ffdec
Address of x[4] = 0x6ffdf0

The Address of Array Elements using Pointer =
 Address of x[0] = 0x6ffde0
 Address of x[1] = 0x6ffde4
 Address of x[2] = 0x6ffde8
 Address of x[3] = 0x6ffdec
 Address of x[4] = 0x6ffdf0
Example : A C++ program to display the address & values of array elements with the help of  Array of pointer concept.
#include <iostream>
using namespace std;
int main()
{
    int x=10,y=20,z=30;
    int *ptr[3];    // Array of pointer
	                     
    ptr[0] = &x;                    
    ptr[1] = &y;                     
    ptr[2] = &z;                     

    cout <<"\n Total Values are : ";
    for(int i=0;i<3;i++)
    {
    	cout << *ptr[i]<<"  ";		
    }
	
    cout <<"\n Total Addresses are : ";
    for(int i=0;i<3;i++)
    {    	
	cout << ptr[i]<<"  ";	
    }    
    return 0;
}

Output :
Total Values are : 10  20  30
Total Addresses are : 0x6ffe14  0x6ffe10  0x6ffe0c

---------  OR  ----------
#include <iostream>
using namespace std;
int main()
{
    int x[3];
    int *ptr[3];    // Array of pointer
	                     
    cout<<"Enter 3 array values : "; 
    for(int i=0;i<3;i++)
    {
    	cin>>x[i];		
    }
    for(int i=0;i<3;i++)
    {
    	//ptr[i]= &x[i];    	
	ptr[i]= x+i;		
    }	
    cout <<"\n Total Addresses are : ";
    for(int i=0;i<3;i++)
    {    	
	cout << ptr[i]<<"  ";	
    }    
    return 0;
}
Output :
Enter 3 array values : 
10
20
30

Total Addresses are : 0x6ffe00  0x6ffe04  0x6ffe08

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Categories: C++

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