How to get the cumulative frequency from an array?

Question

I started a project for mean deviation calculation, during which i need a value of median to use in formulae.
I an able to easily get the median for ungrouped data, without frequencies.
But when i come to grouped data i also need a cumulative frequency, which is an element closest to N in the frequency array.
I want to get the closest value to N. How to proceed?
c.f. should be closest or equal to n.
N is the frequency of the median value...

Answer 1

Thanks!

Answer 2

You need to calculate the minimum delta.

#include <iostream>
#include <stdlib.h>

int d, mind=INT_MAX, x, closest=0;
int[100] v;
cout << "x:";
cin >> x;
for(int i=0; i<100; i++)
{
d = abs(x - v[i]);
if (d < mind)
{
mind=d;
closest=v[i];
}
}
cout << "Closer value to " << x << " is " << closest << endl;