Microsoft/calculator

Entering negative exponents in Scientific mode is not supported

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#1,311 建立於 2020年7月12日

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 (16 留言) (15 反應) (0 負責人)C++ (16,196 star) (2,422 fork)batch import
Area: User ExperienceBugPri: 2help wantedtriage approved

描述

Describe the bug The Calculator app does not support entering negative exponents. For example, in the Scientific mode, we can enter "2.6e2" produces the expected output 260 but trying to type "2.6e-2" does not give 0.026 as it should. I even tried to put the -2 within parentheses to make sure it understands that the dash symbol is not for subtraction here but even that fails.

Steps To Reproduce

  1. Open the Calculator app in Scientific mode.
  2. Type "2.6e-2" and attempt to calculate it.
  3. The answer reported back is 0.6 instead of the expected 0.026.

Expected behavior The Calculator app should ideally support entering negative exponents and on typing "2.6e-2" in Scientific mode, it should understand that a dash following an exponent symbol 'e' is not supposed to mean subtraction but a negation.

Screenshots image

Device and Application Information

  • OS: Windows 10 Home Insider Preview Single Language
  • OS Build: 10 - 0 -20161 - 0 (20161.rs_prerelease.200627-1754)
  • Architecture: x64
  • Application Version: 10.2005.23.0

Requested Assignment I'm just reporting this problem. I don't want to fix it.

貢獻者指南

技術棧
cpp
領域
desktop
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C++ experienceWindows development setupUnderstanding of number parsing
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
65
研究方向
The bug is about entering negative exponents in Scientific mode. The issue is in the expression parser, likely in the tokenization or number parsing logic. Look for how the 'e' character is handled and why a negative sign after 'e' is interpreted as subtraction rather than a negative exponent. Files like 'CalculatorManager.cpp' or 'ExpressionCommand.cpp' may contain the relevant code. The maintainer has not yet provided specific guidance, but the bug report is clear and reproducible.