A c++ program to take the size and components of an Array from user and return the reversed Array

I have written this code that should take the size and components of the array from the user and then return the reverse of the Array but not able to identify and fix the error.
My best guess is that the while loop is causing trouble, but I am not sure.

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

// function to reverse given array
void reverseArray(int arr(), int start, int end){

while (start<=end){
    int temp = arr(start);
    arr(start) = arr(end);
    arr(end) = temp;


// function to print given array
void printArray(int arr(), int size){
   for (int i = 0; i < size; i++)
   cout << arr(i) << " ";

int main() {
    int n;
    cin >> n;
    int mainarray() = {n} ; 
    n = sizeof(mainarray);

    for (int i=0; i<n; i++) {
        cin >> mainarray(i);

reverseArray(mainarray , 0, n-1);
printArray(mainarray ,n);

    return 0;