Reverse operation is being implemented in C language with using function and pointers.

reverse_array.c

/*
*	author: Gökhan Özeloğlu
*	
*	date: 10.10.2018
*
*	code: reverse operation in C language
*
* 	email: gozeloglu@gmail.com
*/

#include <stdio.h>

int* reverse_array(int a, int *array) 
{
	int count = a / 2;

	for (int i = 0; i < count; i++)
	{
		int tmp = array[i];		// Stores in temp variable to not losing after assign operation
		array[i] = array[a-i-1]; // Assigns the last element to first element
		array[a-i-1] = tmp;		// Assigns the temp element to last element
	}

	return array;
}

// Prints the array
void print_array(int a, int *array) 
{
	printf("[");
	for (int i = 0; i < a; ++i)
	{
		if (i == a-1) {
			printf("%d", array[i]);
		} else {
			printf("%d, ", array[i]);	
		}
	}
	printf("]\n");
}

int main(int argc, char const *argv[])
{
	printf("Array size: ");
	int a;
	scanf("%d", &a);
	int array[a];

	printf("Elements: ");
	for (int i = 0; i < a; i++)
	{
		scanf("%d", &array[i]);

	}

	printf("Original array: ");
	print_array(a, array);
	printf("Reversed array: ");
	reverse_array(a, array);
	print_array(a, array);

	return 0;
}