Microsoft/calculator

Incorrect result for exponational and logarithmic functions with exact results

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#574 opened on Jul 5, 2019

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 (7 comments) (0 reactions) (0 assignees)C++ (16,196 stars) (2,422 forks)batch import
Area: User ExperienceBugPri: 3help wantedtriage approved

Description

Describe the bug The below example shows a case that shown answer (2) doesn't match the real answer log(e^2)/log(e)-2 != 0

Steps To Reproduce

Steps to reproduce the behavior:

  1. Go to Scientific mode
  2. enter log(e^2)/log(e^1)-2
  3. See error

Expected behavior log(e^2)/log(e^1)-2 should be 0 as base changing formula for logarithms: LaTex

Screenshots non-zero result

Device and Application Information

  • OS Build: 10.0.17134.0
  • Architecture: X64
  • Application Version: 10.1905.28.0
  • Region: zh-CN
  • Dev Version Installed: False

Additional context This is a new issue related with #309 and #222 Requested Assignment I'm just reporting this problem. I don't know how to fix it.

Contributor guide

Tech stack
cpp
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
C++ basicslogarithmic functionscalculator codebase
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
Examine the calculation engine for logarithmic functions in the repository, focusing on files like 'CalcEngine.cpp' or 'CalculatorManager.cpp' that handle scientific mode computations. Review the implementation of log and exponent functions to see if there is a precision issue or incorrect formula application. Check the related issues #309 and #222 for previous attempts or context.