A program to explain POINTER with single dimensional array

#include <stdio.h>
 
void main()
{
    int a[30], n, i, *p, sum = 0;
 
    printf("Enter how many numbers you want to input: ");
    scanf("%d", &n);
 
    p = a;
    printf("\nEnter numbers:\n");
    for (i = 0; i < n; i++)
    {
        scanf("%d", p + i);
    }
    for (i = 0; i < n; i++)
    {
        sum = sum + (*(p + i));
    }
 
    printf("Sum of numbers = %d", sum);
    printf("\n");
}