Write a c program that will accept n numbers from user and find their sum and average

#include<stdio.h> int main()   {     int   n, i, sum=0, ava=0;     printf( "Enter a positive integer number: " );     scanf( "%d" , &n);     for(i=1;i<=n;i++)    sum= sum+i;     ava=sum/(i-1);     printf( "\nSum is: %d\nAverage is: %d" , sum, ava);     return 0;     }