define a function reverse() to reverse array elements and take input then call reverse() in main().

array in reverse order

// ALGORITHM:
STEP 1: START
STEP 2: INITIALIZE arr[] = {1, 2, 3, 4, 5}
STEP 3: length= sizeof(arr)/sizeof(arr[0])
STEP 4: PRINT "Original Array:"
STEP 5: REPEAT STEP 6 and STEP 7 UNTIL i<length
STEP 6: PRINT arr[i]
STEP 7: i=i+1
STEP 8: PRINT new line.
STEP 9: PRINT "Array in reverse order"
STEP 10: SET i=length-1. REPEAT STEP 11 and STEP 12 UNTIL i>=0
STEP 11: PRINT a[i]
STEP 12: i=i-1
STEP 13: RETURN 0.
STEP 14: END
//

#include<stdio.h>
/* Function to reverse arr[] from start to end*/
void rvereseArray(int arr[], int start, int end)
{
	int temp;
	while (start < end)
	{
		temp = arr[start];
		arr[start] = arr[end];
		arr[end] = temp;
		start++;
		end--;
	}
}	

/* Utility that prints out an array on a line */
void printArray(int arr[], int size)
{
int i;
for (i=0; i < size; i++)
	printf("%d ", arr[i]);

printf("\n");
}

/* Driver function to test above functions */
int main()
{
	int arr[10];
	printf("please Input 10 values");
	for(int i = 0; i < 10; ++i) {
     scanf("%d", &arr[i]);
  }
	int n = sizeof(arr) / sizeof(arr[0]);
	printf("Input Value:\n");
	printArray(arr, n);
	rvereseArray(arr, 0, n-1);
	printf("Reversed array is \n");
	printArray(arr, n);
	return 0;
}