C++ Math & CLI Utils

A collection of small C++ programs for math algorithms and terminal productivity tools.

Overview

This repository is organized into three practical areas:

• math-stats: basic numerical/statistical utilities
• prime-numbers: multiple prime number generation strategies (from naive to optimized)
• cli-timers: interactive CLI tools for countdowns, progress tracking, and time estimation

Directory Structure

• math-stats/
  • mean_median_mode_variance.cpp
  • fibonacci_sequence.cpp
• prime-numbers/
  • prime_generator_naive.cpp
  • prime_generator_naive_progress.cpp
  • prime_generator_sqrt_optimized.cpp
  • next_prime_finder.cpp
• cli-timers/
  • simple_countdown_timer.cpp
  • alarm_countdown_timer.cpp
  • day_remaining_countdown.cpp
  • day_remaining_countdown_original.cpp
  • day_remaining_countdown_original_design.cpp
  • day_remaining_countdown_if_based.cpp
  • page_reading_progress.cpp
  • task_time_estimator.cpp

What Each Program Demonstrates

math-stats

• mean_median_mode_variance.cpp: computes core descriptive statistics from user input
• fibonacci_sequence.cpp: prints Fibonacci sequence values and handles overflow boundary

prime-numbers

• prime_generator_naive.cpp: baseline prime generation using full trial division
• prime_generator_naive_progress.cpp: naive generation with progress bar output
• prime_generator_sqrt_optimized.cpp: faster prime generation using sqrt-based checks and odd-only loop
• next_prime_finder.cpp: finds prime numbers starting from a user-provided value

cli-timers

• simple_countdown_timer.cpp: basic countdown timer for CLI workflows
• alarm_countdown_timer.cpp: target-time countdown with progress display and audible alert
• day_remaining_countdown.cpp: time remaining in the current day (refined version)
• day_remaining_countdown_original.cpp: original implementation snapshot
• day_remaining_countdown_original_design.cpp: original design variant snapshot
• day_remaining_countdown_if_based.cpp: if-based variant of day-remaining logic
• page_reading_progress.cpp: page-count progress tracker for reading/study sessions
• task_time_estimator.cpp: quick estimator for remaining task time (reasoning/task count based)