4 Harmonic & Geometric Mean

// Harmonic Mean
#include<stdio.h>
#include<math.h>
int main()
{
    int n ;
    printf("Enter the number of observation\n");
    scanf("%d",&n);
    int obs[n];

    printf("\nEnter each elements one by one \n");
    for(int i=0 ; i<n ; i++){
        scanf("%d",&obs[i]);
    }

    int fre[n];
    printf("\nEnter each frequency one by one \n");
    for(int i=0 ; i<n ; i++){
        scanf("%d",&fre[i]);
    }

    float temp,sum=0,N=0;
    for(int i=0 ; i<n ; i++){
        N += fre[i];
        temp = (float)fre[i]/obs[i] ;
        sum += temp;
    }

    float ans = N/sum;
    printf("Harmonic Mean is : %f",ans);

    return 0;
}

Output[?2004l
Enter the number of observation
7

Enter each elements one by one
10 1 2   12 14 16 171    8 20 22\ 

Enter each frequency one by one
2 5 8 10 4 4     7 4 4
Harmonic Mean is : 15.481060

// Geometric Mean
#include<stdio.h>
#include<math.h>
int main()
{
    int n ;
    printf("Enter the number of observation\n");
    scanf("%d",&n);
    int obs[n];

    printf("\nEnter each elements one by one\n");
    for(int i=0 ; i<n ; i++){
        scanf("%d",&obs[i]);
    }
    int fre[n];
    printf("\nEnter each frequency one by one \n");
    for(int i=0 ; i<n ; i++){
        scanf("%d",&fre[i]);
    }
    float sum=0,N;
    for(int i=0 ; i<n ; i++){
        N += fre[i];
        float temp  = (log10(obs[i]) * fre[i]);
        sum += temp;
    }
    sum/=N;

    float GM = pow(10,sum);


    printf("\nGeometric for the following program is %f",GM);
    return 0;
}