Progression Class Reference

A header only c++ progression library. More...

#include <progression.hpp>

Inheritance diagram for Progression:

Collaboration diagram for Progression:

Public Member Functions
virtual long	first_value ()
	Resets the progression and returns the first value.
virtual long	next_value ()=0
	Advances to and returns the next value in the progression.
void	print_progression (int n)
	Prints the first n terms of the progression.
virtual	~Progression ()=default
	Virtual destructor to allow proper cleanup of derived objects.

Protected Attributes
long	curr
	Current value in the progression.
long	first
	First value of the progression.

Detailed Description

A header only c++ progression library.

Author

Magpiny BO

Date

15 December 2025

Warning

Ensure proper memory management while using this library

Note

This library implements arithmetic, geometric and fibonacci progressions only

Basic Usage

#include "progression.hpp"
 
int main(){
Progression *ap = new ArithProgression(2, 3);
ap->print_progression(10);
 
delete ap;
 
return EXIT_SUCCESS;
}

Abstract base class representing a generic numeric progression.

This class defines the common interface for all progressions. It cannot be instantiated directly because next_value() is pure virtual. Derived classes must implement their specific way of advancing to the next term.

Member Function Documentation

first_value()

long Progression::first_value ( )

virtual

Resets the progression and returns the first value.

This function is called at the beginning of print_progression() to ensure the sequence starts from the beginning.

Returns

The first value in the progression.

Reimplemented in FibonacciPg.

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next_value()

virtual long Progression::next_value ( )

pure virtual

Advances to and returns the next value in the progression.

This is a pure virtual function – derived classes must provide their own implementation.

Returns

The next value in the sequence.

Implemented in ArithProgression, FibonacciPg, and GeometricProgression.

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print_progression()

void Progression::print_progression

(

int

n

)

Prints the first n terms of the progression.

The output is space-separated on a single line followed by a newline.

Parameters

n	Number of terms to print (n ≥ 1).

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The documentation for this class was generated from the following file:

• progression.hpp