Program to demonstrate standard deviation using function

Write a program to demonstrate standard deviation using function

#include<stdio.h>

#include<conio.h>

#include<math.h>

float mean(int a[],int n);

float std(int a[],int n,float m);

void main()

{

            float m,sd;

            int n,a[10],i;

            clrscr();

            printf(“\nenter the number of values\n”);

            scanf(“%d”,&n);

            printf(“\n enter the elements\n”);

            for(i=0;i<n;i++)

                        scanf(“%d”,&n);

            m=mean(a,n);

            printf(“mean=%f\n”,m);

            sd=std(a,n,m);

            printf(“\n sd=%f”,sd);

            getch();

}

float mean (inta[],intn)

{

            float f;

            int sum=0;

            for(i=0;i<n;i++)

                        sum=sum+ a[i];

            f=(float)sum/n;

            return f;

}

float std(int a[],int n,float m)

{

            int i;

            float std,sum=0.0,d;

            for(i=0;i<n;i++)

            {

                        d=a[i]-m;

                        a=d*d;

                        sum=sum+d;

            }

            sd=sqrt(sum\n);

            return sd;

}