08/01/09 22:30:25
>>711
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
double Average(int count,int data[])
{
double sum=0;int i;
for(i=0;i<count;i++)sum+=data[i];
return sum/count;
}
double StandardDeviation(int count,int data[])
{
double av,variance;
int i;
variance=0;
av=Average(count,data);
for(i=0;i<count;i++)variance+=((data[i]-av)*(data[i]-av));
variance/=count;
return sqrt(variance);
}