include SAMPLER include stdio include math include stdlib double 100 i

#include<SAMPLER.H>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>

double x[100];
int i,n;
double mean;
double  std;
void meanstd( double *x, int length, double mean, double std_dev)
{
	int i;
	double sum_x, sum_sq;
	sum_x=0.0;
	sum_sq=0.0;
	for( i=0; i<length; i++)
	{
		sum_x=sum_x+x[i];
        sum_sq=sum_sq+x[i]*x[i];

	}
	mean=sum_x/length;
	std_dev=sqrt((sum_sq-pow(sum_x, 2)/length)/(length-1));

}

int main (void)
{
SAMPLE;
    mean=0;
	std=0;
	n=100;
	for(i=0; i<n; i++)
		x[i]=rand()%100;
	meanstd(x,n, mean, std);    
SAMPLE;
    return 0;
}