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ip-20.c

Problem Statement

Write a C program that defines an array of integers, and includes a user-defined function named reverseArray with the signature void reverseArray(int arr[], int size);. The function should reverse the elements of the array.

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Property Detail
Author Amit Dutta amitdutta4255@gmail.com
Date 03 Jan 2026
License MIT License (See the LICENSE file for details)

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Source Code

#include <stdio.h>

void inputArray(int[], int);
void reverseArray(int[], int);

int main()
{
    int size;
    printf("How many element do you want to add: ");
    scanf("%d", &size);
    int arr[size];
    inputArray(arr, size);
    reverseArray(arr, size);
    return 0;
}

void inputArray(int arr[], int size)
{
    int i;
    for (i = 0; i < size; i++)
    {
        printf("Enter element %d: ", i + 1);
        scanf("%d", &arr[i]);
    }
}

void reverseArray(int arr[], int size)
{
    int i, j, temp;
    printf("\nBefore Reverse: \n");
    for (i = 0; i < size; i++)
    {
        printf("Position: %d, Value: %d\n", i, arr[i]);
    }
    for (i = 0, j = size - 1; i < j; i++, j--)
    {
        temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }
    printf("\nAfter Reverse: \n");
    for (i = 0; i < size; i++)
    {
        printf("Position: %d, Value: %d\n", i, arr[i]);
    }
}