Programming Forums - Casting signed int to unsigned int?

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null_ptr0

Nov 23rd, 2007 8:35 PM

Casting signed int to unsigned int?

I know I could use simple C casts (unsigned int uint_fld = (unsigned int) ivar;) but I'm not sure if I should use some of the handy casting functions (unsigned int uint_fld = dynamic_cast<unsigned int>(ivar);). Which should I chose?

sidequestion: I have countlessly just casting something unsigned through

unsigned char uchar_var = (unsigned) char_var;

, but is this appropriate for c++ programming?

Ancient Dragon

Nov 23rd, 2007 9:27 PM

Re: Casting signed int to unsigned int?

Most c++ pureists would say that it is NOT appropriate for c++. IMO (for what its worth) I think it depends -- in your example it would be ok, but in more complex situations it would not. If you do use the c-style castings you must make sure you absolutely KNOW what you are doing because the compiler will simply assume you are correct -- no error checking. The compiler will produce warnings or error with c++ casts.

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