Programming Forums > Application Development > C++

null_ptr0 · Nov 23rd, 2007, 8:35 PM

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

 c++ Syntax (Toggle Plain Text) 
unsigned char uchar_var = (unsigned) char_var;
unsigned char uchar_var = (unsigned) char_var;

, but is this appropriate for c++ programming?

Ancient Dragon · Nov 23rd, 2007, 9:27 PM

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.

Nov 23rd, 2007, 8:35 PM	#1
null_ptr0 11 years old Join Date: Nov 2007 Posts: 79 Rep Power: 1	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 c++ Syntax (Toggle Plain Text) unsigned char uchar_var = (unsigned) char_var; unsigned char uchar_var = (unsigned) char_var; , but is this appropriate for c++ programming?

Nov 23rd, 2007, 9:27 PM	#2
Ancient Dragon PFO God In Training Join Date: Jun 2005 Location: near St Louis, MO. (USA) Posts: 498 Rep Power: 4	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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Programming Forums > Application Development > C++

Casting signed int to unsigned int?