2 Answers
#include <stdio.h>
#include <math.h>
int main()
{
float a[10], *ptr, mean, sum = 0, var, sumstd = 0, std;
int n, i;
printf(“Enter the number of elements\n”);
scanf(“%d”, &n);
printf(“Enter the array elements\n”);
for (i = 0; i < n; i++)
{
scanf(“%f”, &a[i]);
}
ptr = a;
for (i = 0; i < n; i++)
{
sum = sum + (*ptr);
ptr++;
}
mean = sum / n;
ptr = a;
for (i = 0; i < n; i++)
{
sumstd = sumstd + pow((*ptr – mean), 2);
ptr++;
}
var = sumstd / n;
std = sqrt(var);
printf(“Sum = %f \n”, sum);
printf(“Mean = %f \n”, mean);
printf(“Variance = %f \n”, var);
printf(“Standard Deviation = %f”, std);
}