Summary Statistics of ungrouped data

The Program

#include <stdio.h>
#include <math.h>

int main()
{
	int i, n;
	double x, sum = 0, sumsqr = 0, logsum = 0, invsum = 0, variance, 
                       SD, CV, AM, GM, HM;

	printf("Total Observations: ");
	scanf("%d", &n);
	
	for(i=1; i<=n; i++){
		printf("\nX%d: ", i);
		scanf("%lf", &x);
		
		sum = sum + x;
		sumsqr = sumsqr + x*x;
		logsum = logsum + log(x);
		invsum = invsum + 1.0/x;
	}
	
	AM = sum/n;
	GM = exp(logsum/n);
	HM = n/invsum;
	variance = sumsqr/n - AM*AM;
	SD = sqrt(variance);
	CV = SD/AM*100;
	
	printf("\nAM = %g", AM);	
	printf("\nGM = %g", GM);	
	printf("\nHM = %g", HM);	
	printf("\nVariance = %g", variance);	
	printf("\nSD = %g", SD);	
	printf("\nCV = %g", CV);	

	return 0;
}

Output

Total Observations: 5

X1: 24

X2: 56

X3: 17

X4: 28

X5: 10

AM = 27
GM = 22.9721
GM = 19.6803
Variance = 248
SD = 15.748
CV = 58.326