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I added comments to describe the purpose of fuctions. #2064

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9 changes: 7 additions & 2 deletions src/CalcManager/NumberFormattingUtils.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -11,16 +11,18 @@ namespace UnitConversionManager::NumberFormattingUtils
/// <param name="number">number to trim</param>
void TrimTrailingZeros(_Inout_ wstring& number)
{
//check if the number contains a decimal point.
if (number.find(L'.') == wstring::npos)
{
return;
return; //no trailing zeros or decimal to trim.
}

//find the last non-zero digit and erase and triling zeros.
if (auto i = number.find_last_not_of(L'0'); i != wstring::npos)
{
number.erase(number.cbegin() + i + 1, number.cend());
}

//remove the trailing decimal point if it exists.
if (number.back() == L'.')
{
number.pop_back();
Expand All @@ -32,12 +34,15 @@ namespace UnitConversionManager::NumberFormattingUtils
/// <param name="value">the number</param>
unsigned int GetNumberDigits(wstring value)
{
//trim trailing zeros and decimal point.
TrimTrailingZeros(value);
unsigned int numberSignificantDigits = static_cast<unsigned int>(value.size());
//if the number contains a decimal point, reduce the count by one.
if (value.find(L'.') != wstring::npos)
{
--numberSignificantDigits;
}
//if the number is negative, reduce the count by one
if (value.find(L'-') != wstring::npos)
{
--numberSignificantDigits;
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