How to Calculate Harmonic Mean (HM) for Raw Data in C programming?

Calculate Harmonic Mean (HM) for Raw Data in C programming

// Here, ll = lowerLimit
// cl = classLength
// nc = number of classes
// sf = sum of frequency
// f = frequency
#include<stdio.h>
#include<conio.h>
void main()
{
            int ll,cl,up,nc,l[100],u[100],i,n,x[100],f[100],sf=0;
            float fix[100],sfix=0.0;
            clrscr();
            printf("Enter the lower limit: ");
            scanf("%d",&ll);
            printf("Enter the class length: ");
            scanf("%d",&cl);
            printf("Enter the total number of class: ");
            scanf("%d",&nc);
            for(i=0;i<nc;i++)
            {
                        up=ll+cl;
                        l[i]=ll;
                        u[i]=up;
                        ll=up;
                        x[i]=((float)l[i]+(float)u[i])/2;
            }
            for(i=0;i<nc;i++)
            {
                        printf("Enter the frequency for class %d-%d: ",l[i],u[i]);
                        scanf("%d",&f[i]);
                        fix[i]=(float)f[i]/(float)x[i];
                        sfix+=fix[i];
                        sf+=f[i];
            }
            printf(" Class Xi Fi Fi/Xi ");
            for(i=0;i<nc;i++)
            printf("%d-%d %d %d %.4f ",l[i],u[i],x[i],f[i],fix[i]);
            printf(" Total %.4f",sfix);
            printf(" sum of Fi/Xi is: %.4f",sfix);
            printf(" %.4f",(float)sf/(float)sfix);
 
           getch();
}

Output: