C++ Program to Access Array element using pointer


January 21, 2023, Learn eTutorial
1401

In this C++ program, an array of five elements is declared and are accessed using a pointer.

What is an Array in C++?

An array is a datatype that can able to store some elements of the same datatype in continuous memory locations. The array will be declared as

 dataType arrayName[arraySize];.

An array has elements that can be accessed by using a variable which is called as an Index variable.
array[index]

What are C++ pointers

In C++, pointers are variables that can able to store the address of another variable. A pointer will be declared using the asterisk (*) sign, int *pointVar.

int *ptr;
int arr[5];

// store the address of the first
// element of arr in ptr
ptr = arr
 

How to access elements of the array using pointer in C++?

Declare an integer-type array of size 5 and ask the user to enter the elements. Read the elements into the array a[5] by using a for loop. Use another for loop to access the elements on the array by using the pointer, and display the elements.

Algorithm

Step 1:  Call the header file iostream.

Step 2: Use the namespace std.

Step 3: Open the integer type main function; int main().

Step 4: Declare integer type array a[5]

Step 5: Ask the user to enter the elements.

Step 6: Read the elements into the array

Step 7:Access the elements using the pointer and display them on the screen.

Step 8: Exit
 

C++ Source Code

                                          #include <iostream>
using namespace std;

int main()
{
   int a[5];
   cout << "Enter elements: ";

   for(int i = 0; i < 5; ++i)
      cin >> a[i];

   cout << "You entered: ";
   for(int i = 0; i < 5; ++i)
      cout << endl << *(a + i);

   return 0;
}
                                      

OUTPUT

Enter elements: 6
3
5
6
4
You entered: 
6
3
5
6
4