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Practical-21

Write a program using pointers to read an array of integers and print its elements in reverse order.​

Introduction

In this program, we will learn to write a program using pointers to read an array of integers and print its elements in reverse order.

Algorithm

  1. Start
  2. Declare an array of size 100.
  3. Declare two integer variables.
  4. Input the size of the array.
  5. Scan the size of the array.
  6. Read the elements of the array.
  7. Scan the elements of the array.
  8. Print the elements of the array in reverse order.
  9. End

Code

Practical-21.c
#include <stdio.h> // Include the library to use printf() and scanf()

void main()
{
    int arr[100]; // Declare an array of size 100
    int i, size; // Declare two integer variables
    printf("Enter the size of array: "); // This will ask the user to enter the  size of the array
    scanf("%d", &size); // Store the value in size

    // read elements of the array
    printf("Enter the elements of the array: ");
    for (i = 0; i < size; i++)
    {
        scanf("%d", &arr[i]); // Store the values in the array
    }

    // print elements of the array in reverse
    printf("The elements of the array in reversed order: \n");
    for (i = size - 1; i >= 0 ; i--)
    {
        printf("%d\n", arr[i]); // print each element
    }
}

Output

Enter the size of array: 5
Enter the elements of the array: 1
2
3
4
5
The elements of the array in reversed order:
5
4
3
2
1
Explanation

The program first asks the user to enter the size of the array. Then it asks the user to enter the elements of the array. Then it prints the elements of the array in reverse order.

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