In this tutorial, we are going to write a C Program to calculate standard deviation in C Programming with practical program code and step-by-step full complete explanation.
C Program to calculate the standard deviation.
#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAXSIZE 100
void main()
{
int i,n;
float value[MAXSIZE], deviation;
int sum,sumsqr,n=0;
float mean, variance, stddeviation;
printf("Input values: input -1 to endn");
for(i=1;i<MAXSIZE;i++)
{
scanf("%f",&value[i]);
if(value[i]== -1)
break;
sum += value[i];
n+=1;
}
mean=sum/(float)n;
for(i=1;i<=n;i++)
{
deviation = value[i]-mean;
sumsqr += deviation*deviation;
}
variance = sumsqr/(float)n;
stddeviation=sqrt(variance);
printf("nNumber of items: %d",n);
printf("nMean: %f",mean);
printf("nStandard deviation: %f",stddeviation);
}
Output
Input values: input -1 to end 65 9 27 78 12 20 33 49 -1 Number of items: 8 Mean: 36.625000 Standard deviation: 23.510303
