0

I have this homework that i have to write the cxx of a header file. i started the homework but i got stuck in the meddle of it. I tried to find the abs_minimum function but it's too complicated because i have to keep track of the numbers and find it.

This is the header file

```
// Provided by:
// Email Address:
// FILE: stats.h
// CLASS PROVIDED: statistician
// (a class to keep track of statistics on a sequence of real numbers)
// This class is part of the namespace main_savitch_2C.
//
// CONSTRUCTOR for the statistician class:
// statistician( );
// Postcondition: The object has been initialized, and is ready to accept
// a sequence of numbers. Various statistics will be calculated about the
// sequence.
//
// PUBLIC MODIFICATION member functions for the statistician class:
// void next(double r)
// The number r has been given to the statistician as the next number in
// its sequence of numbers.
// void reset( );
// Postcondition: The statistician has been cleared, as if no numbers had
// yet been given to it.
//
// PUBLIC CONSTANT member functions for the statistician class:
// double abs_maximum( ) const
// Precondition: length( ) > 0
// Postcondition: The return value is the absolute value of the number
// with the largest magnitude in the statistician's sequence.
// double abs_minimum( ) const
// Precondition: length( ) > 0
// Postcondition: The return value is the absolute value of the number
// with the smallest magnitude in the statistician's sequence.
// int length( ) const
// Postcondition: The return value is the length of the sequence that has
// been given to the statistician (i.e., the number of times that the
// next(r) function has been activated).
// double maximum( ) const
// Precondition: length( ) > 0
// Postcondition: The return value is the largest number in the
// statistician's sequence.
// double mean( ) const
// Precondition: length( ) > 0
// Postcondition: The return value is the arithmetic mean (i.e., the
// average of all the numbers in the statistician's sequence).
// double minimum( ) const
// Precondition: length( ) > 0
// Postcondition: The return value is the tinyest number in the
// statistician's sequence.
// double recent( ) const
// Precondition: length( ) > 0
// Postcondition: The return value is the most recent number given to
// the next function.
// double sum( ) const
// Postcondition: The return value is the sum of all the numbers in the
// statistician's sequence.
//
// NON-MEMBER functions for the statistician class:
// statistician operator +(const statistician& s1, const statistician& s2)
// Postcondition: The statistician that is returned contains all the
// numbers of the sequences of s1 and s2.
// statistician operator *(double scale, const statistician& s)
// Postcondition: The statistician that is returned contains the same
// numbers that s does, but each number has been multiplied by the
// scale number.
//
// VALUE SEMANTICS for the statistician class:
// Assignments and the copy constructor may be used with statistician objects.
#ifndef STATS_H // Prevent duplicate definition
#define STATS_H
#include <iostream>
namespace main_savitch_2C
{
class statistician
{
public:
// CONSTRUCTOR
statistician( );
// MODIFICATION MEMBER FUNCTIONS
void next(double r);
void reset( );
// CONSTANT MEMBER FUNCTIONS
double abs_maximum( ) const;
double abs_minimum( ) const;
int length( ) const;
double maximum( ) const;
double mean( ) const;
double minimum( ) const;
double recent( ) const;
double sum( ) const;
// FRIEND FUNCTIONS
friend statistician operator +
(const statistician& s1, const statistician& s2);
friend statistician operator *
(double scale, const statistician& s);
private:
double my_abs_maximum; // The absolute value of the largest magnitude
double my_abs_minimum; // The absolute value of the smallest magnitude
int my_length; // How many numbers in the sequence
double my_maximum; // The largest number in the sequence
double my_minimum; // The smallest number in the sequence
double my_recent; // The most recent number given to the sequence
double my_sum; // The sum of all the numbers in the sequence
};
}
#endif
```

this is the cxx file that i wrote

```
#include <cassert>
#include <math>
#include "stats.h"
namespace main_savitch_2c
{
statistician::statistician() : count(0), total(0)
{
}
void statistician::next(double r)
{
if (count <= 0)
{
count = 1;
total = r;
tinyest = r;
largest = r;
return;
}
count = count + 1;
total +=r;
if (r < tinyest)
{
tinyest = r;
}
if (largest < r)
{
largest = r;
}
}
void statistician::reset()
{
count= 0;
total = 0;
}
double statistician::abs_maximum( ) const
{
asser(length() > 0);
a= f_abs(largest);
b= f_abs(tinyest);
if (a>b)
{
return a;
}
else (a<b)
{
return b;
}
}
double statistician::abs_minimum() const
{
asser(length() > 0);
return
}
int statistician::length() const
{
return count;
}
double statistician::maximum() const
{
asser(length() > 0);
return largest;
}
double statistician::mean() const
{
asser(length() > 0);
return total/count;
}
double statistician::minimum() const
{
asser(length() > 0);
return tinyest;
}
double statistician::recent() const
{
asser(length() > 0);
return
}
double statistician::sum() const
{
return total;
}
statistician operator +(const statistician& s1, const statistician& s2)
{
statistician s3;
s3.next (s1.sum() + s2.sum());
return s3;
}
statistician operator *(double scale, const statistician& s)
{
return s2;
}
}
```