CODEWITHSUNDEEP
c++superscript
Srilaxmi
Srilaxmi

Reputation: 109

How to convert the string that contains the superscript(m²) to normal string like m2 in C++

In my project, I need to convert the string that contains the superscript - m² to the string m2.

My project accepts unit of measure which includes meter square (m²) or meter cube (m³). And I need to convert the superscripts to a normal integer or string in order to further process the input data. However, at this moment am unable find any thing in C++ that does this for me.

The application is in C++ and we are using CComBSTR to store the string.

The ideal output would be m2 for m² and m3 for m³ and so on...

Any suggestions

Upvotes: 3

Views: 891

Answers (2)

MSalters
MSalters

Reputation: 179991

A CComBSTR is just a wrapper for a BSTR. That in turn is a WCHAR*, which maps to C++ type wchar_t*. Since you're on Windows, you have to know that WCHAR is UTF-16.

That means you need to look for wchar_t(0x00B2) and wchar_t(0x00B3). std::find can do that, just pass it the begin and end of your BSTR.

Upvotes: 2

marom
marom

Reputation: 5230

I suspect the key point is the character encoding. A superscript 2 is not an ascii char. They have dedicated unicode chars (see http://en.wikipedia.org/wiki/Superscripts_and_Subscripts, with values in range 0x207x, except 2 and 3) and they are typically encoded with 16 bits. If you have a std::string then a character then they are probably encoded in UTF-8, which means more than one char per character (see http://en.wikipedia.org/wiki/UTF-8).

There is a lot to read, but at the end it's quite easy. You just need to search for a substring (che UTF-8 of superscript 2 and 3)

Upvotes: 0

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