Sum,mean,daviation & standard daviation bY muftY

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

int main()
{
    int a[100],b,c,d,e,f=0,g=0,h=0,m,add=0,i,j,k,l,n;

    double ad,bd,cd,dd,ed,ff=0.00,gd=0.00,hd=0.00;
    scanf("%d",&m);

    for(h=0; h<m; h++)
    {
        scanf("%d",&a[h]);
        add=add+a[h];

    }
    printf("Sum=%d\n",add);
    ad=(add*1.00)/m*1.00;
    printf("Mean=%.2lf\n",ad);
    for(j=0; j<m; j++)
    {
        printf("Deviation of d%d= %.2lf \n",j+1,a[j]-ad);
    }
    for(k=0; k<m; k++)
    {
        bd=a[k]*a[k];
        cd=cd+bd;
    }

    dd=(cd*1.00)/(m*1.00);
    ed=sqrt(dd);
    printf("Standard Deviation =%.2lf\n",ed);

    return 0;

}