help me to fix this c++ insertion sort code

Question

i took this code from insertion sort in c++ from a guide in this site but when i run it in my visual studio 2017 it shows me two error.
1-'void swap(int *,int *)': cannot convert argument 1 from 'int' to 'int *'
2-'cout': undeclared identifier.
the code works in online compiler
this is the code :
#include <iostream>
#include "stdafx.h"
using namespace std;

void swap(int *a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}

void insertionSort(int arr[], int n) {
int i, j;
for (i = 1; i < n; i++) {
j = i;
while (j > 0 && arr[j - 1] > arr[j]) {
swap(arr[j], arr[j - 1]);
j--;
}
}
}

void printArray(int arr[], int size) {
for (int i = 0; i < size; i++)
cout << arr[i] << " ";
}

int main() {
int arr[] = { 5, 2, 42, 6, 1, 3, 2 };
int n = sizeof(arr) / sizeof(arr[0]);
insertionSort(arr, n);
printArray(arr, n);

return 0;
}

Answer 1

Thank you.