Array reverse,summation ,average

#include<stdio.h>
#include<conio.h>
int main()
{
    int a[100],b[100],temp,i,j,n,sum=0;
    float avg;

    printf("How many numbers do you want in array:");
    scanf("%d",&n);

    puts("\nplease enter the number of array:");

    for(i=1; i<=n; i++)
    {
        scanf("%d",&a[i]);

        
}
    for(i=1; i<=n; i++)
    {
        printf("%d",&a[i]);

        sum=sum+a[i];

        avg=(float)(sum)/n;

    }
    puts("----------------------");

    printf("The sum  of the array is:%d",sum);

    puts("\n----------------------");

    printf("The average of the array is:%.2f",avg);

    puts("\n----------------------");

    puts("The reversed array is:");

    puts("----------------------");
    for(i=n; i>=1; i--)

    {
        printf("%d ",a[i]);
    }
    return 0;
}

output:

How many numbers do you want in array:5

please enter the number of array:
4 7 9 3 8
----------------------
The sum  of the array is:31
----------------------
The average of the array is:6.20
----------------------
The reversed array is:
----------------------

8 3 9 7 4