The Solution is:
/*	sumav.c - prints statistics: sum, average, sum of squares
                  of n inputted numbers*/

#include	

main()
{
	float	x, sum, sq;
	int	i, n;

	printf("How many numbers? ");
	scanf("%d", &n);
	printf("Please enter number  1: ");
	scanf("%f", &x);
	sum = x;	/*	first value entered	*/
	sq = x*x;
	for (i = 2; i <= OR SUM, &X); SQ SQUARES="%10.3f\n"," I++) , I);
		SCANF( SQ); N; I NUMBER +="x*x;" / 1 PRINTF("SUM="%10.3f,"