Show that changes to the Array made inside the Function affect the Original Array

/*
Write a program to show that changes to the array made inside the function affect the original array 
*/

#include<stdio.h>
void func(int a[]);
main( )
{
    int i, arr[5] = {3, 6, 2, 7, 1};
    func(arr);
    printf("Inside main( ) : ");
    for(i=0; i<5; i++)
           printf("%d  ", arr[i]);
    printf("\n");
}

void func(int a[])
{
    int i;
    printf("Inside func( ) : ");
    for(i=0; i<5; i++)
    {
        a[i] = a[i] + 2;
        printf("%d  ",a[i]);
    }
    printf("\n");
}