/* Standard Deviation - Calculate standard deviation of n numbers */

#include  <stdio.h>
#include  <conio.h>
#include  <math.h>

void  main()
{
    int  i, n, x[50] ;
    float  avg, std, sum = 0, s = 0 ;
    clrscr() ;
    printf("Enter the number of elements: ") ;
    scanf("%d", &n) ;
    printf("Enter the elements: \n") ;
    for(i=0 ; i<n ; i++)
        {
            scanf("%d", &x[i]) ;
            sum=sum+x[i] ;
        }
    avg=sum/n ;
    for(i=0 ; i<n ; i++)
        s = s + pow(x[i]-avg, 2) ;
    std = sqrt(s/n) ;
    printf("The standard deviation of given numbers is %f",std);
    getch();
}

/*
Output:

Enter the number of elements: 6
Enter the elements:
2 9 1 5 7 4
The standard deviation of given numbers is 2.748737
*/