Q:

# C program to swap first element with last, second to second last and so on (reversing elements)

Given an array of integer elements and we have to reverse elements (like, swapping of first element with last, second element with second last and so on) using C program.

Example:

```    Input:
Array elements are: 10, 20, 30, 40, 50

Output:
Array elements after swapping (reversing):
50, 40, 30, 20, 10```

## Program to reverse array elements (by swapping first element to last, second to second last and so on) in C

``````/** C program to swap first element with last,
* second element with second last and so on in
* an array.
*/

#include <stdio.h>

// function to swap the array elements
void Array_Swap(int *array , int n)
{
// declare some local variables
int i=0,temp=0;

for(i=0 ; i<n/2 ; i++)
{
temp = array[i];
array[i] = array[n-i-1];
array[n-i-1] = temp;
}
}

// main function
int main()
{
// declare an int array
int array_1[30] = {0};

// declare some local variables
int i=0 ,n=0;

printf("\nEnter the number of elements for the array : ");
scanf("%d",&n);

printf("\nEnter the elements for array_1..\n");
for(i=0 ; i<n ; i++)
{
printf("array_1[%d] : ",i);
scanf("%d",&array_1[i]);
}

// Sort the array in ascending ordder
Array_Swap(array_1 , n);

printf("\nThe array after swap is..\n");
for(i=0 ; i<n ; i++)
{
printf("\narray_1[%d] : %d",i,array_1[i]);
}

return 0;
}``````

Output

```Run 1:

Enter the number of elements for the array : 6

Enter the elements for array_1..
array_1[0] : 1
array_1[1] : 2
array_1[2] : 3
array_1[3] : 4
array_1[4] : 5
array_1[5] : 6

The array after swap is..

array_1[0] : 6
array_1[1] : 5
array_1[2] : 4
array_1[3] : 3
array_1[4] : 2
array_1[5] : 1```