Kajornsak

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


int main(){
    double num[20],avg,sd,sum = 0,sumsd = 0,sum2,avg2,sumsd2,sd2;

    for (int i =0; i < 20; i++) {
        scanf("%lf",&num[i]);
        sum += num[i];
    }

    avg = sum/20;

    for (int i = 0; i < 20; i++) {
        sumsd += pow((num[i]-avg),2.0);
    }
    sd = sqrt(sumsd/20);
    printf("AVG = %.4lf\n",avg);
    printf("SD = %.4lf\n",sd);
    //-----------------------------------------------------//

    sum2 = 0;
    sumsd2 = 0;
    sd2 = 0;
    avg2 = 0;
    int count = 0;
    for (int i = 0; i < 20 ; i++) {
        if (fabs(num[i]-avg) > (4*sd)) {
            num[i] = 0;
            count++;

        }
        sum2 += num[i];
    }
    for (int i = 0; i < 20; i++) {
        printf("%.0lf ",num[i]);
    }

    avg2 = sum2/(20-count);

    for (int i = 0; i < 20; i++) {
        if (num[i] == 0) {
            continue;
        }
        else
            sumsd2 += pow((num[i]-avg2),2.0);
    }

    sd2 = sqrt(sumsd2/(20-count));

    printf("\nAfter removing outliers:\n");
    printf("AVG = %.4lf\n",avg2);
    printf("SD = %.4lf\n",sd2);


}


//20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
@//0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 10