This is a discussion on Limit of an int within the C++ Programming forums, part of the General Programming Boards category; Hi For my calculator i was wondering if the user inputted an extremely large number for multiplication and entered another ...
Hi
For my calculator i was wondering if the user inputted an extremely large number for multiplication and entered another large number and the result exceeded the limit for an unsigned int how would i make it so that the result doesn't excced it? Would i put the result on the free store or something? Thanks for all of your help.
Are you asking how you would detect possible arithmetic overflow before it happens?
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
I support http://www.ukip.org/ as the first necessary step to a free Europe.
Sort of, but i would like to let the user put in any number without the overflow if you understand my meaning.
You can try a library called GMP... it's something many here have recommended (though I have not yet personally tried it). It will allow you to handle such issues without worry.
I used to be an adventurer like you... then I took an arrow to the knee.
Use a library designed to cope with arbitrary numbers of digits.
http://en.wikipedia.org/wiki/GNU_Mul...cision_Library
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
I support http://www.ukip.org/ as the first necessary step to a free Europe.
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