#include <stdio.h>
#include <stdlib.h>

#define N 5
int main()
{
	int a[N];
	int i;
	
	for(i=0; i< N; i++) {
		printf("Enter a value for a[%d]: ", i);
		scanf("%d", &a[i]);
	}
	
	float sum=0;
	for(i=0; i< N; i++)
		sum+=a[i];
	
	float sum2=0;
	for(i=0; i<5; i++)
		sum2 += a[i]*a[i];
	
	// This can be done in one loop as well.
	//for(i=0; i<5; i++)
	//{
	//	sum+=a[i];
	//	sum2 += a[i]*a[i];
	//}

	float average = sum/N;		
	float stdev = sqrt( sum2/N - average*average);
	
	printf("The average is %f\n", average);
	printf("The stdev is %f\n", stdev);

	system("pause");
}