Hello,

I am writing a program to read a series of numbers then calculate average, geometric mean and harmonic mean. I'm not sure if my formulas are entered correctly. Any thoughts, (not good at math)

Code:

/*this program will calculate the average, geometric mean and harmonic mean of a series of 5 pos numbers.
written by: Patricia Stephens
Date: June 2009
*/
#include<stdio.h>
#include "stdafx.h"
#include "math.h"
#define M 5
int main(void)
{
//local declarations
int i;
int sum;
int avg;
int n;
sum=avg=0;
//Statements
printf("please enter 5 whole numbers then key <EOF> to stop(CTRL+D OR CTRL + Z\n");
for (i=0; i<=M; i++)
{
scanf_s("%2d",&n);
sum=sum+n;
}
printf("the sum is %2d\n", ((sum)-n));
printf("the average is %2d\n", (int(sum)/n));
printf("the harmonic mean is %f\n", (n/float(sum)/1));
printf("the geometric mean is %f\n", pow(sum,1.0/n));
return 0;
}//main