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c++ Programming Glossary: two'sHow to add two numbers without using ++ or + or another arithmetic operator http://stackoverflow.com/questions/1149929/how-to-add-two-numbers-without-using-or-or-another-arithmetic-operator is something I have written a while ago for fun. It uses a two's complement representation and implements addition using repeated..
What happens if you static_cast invalid value to enum class? http://stackoverflow.com/questions/18195312/what-happens-if-you-static-cast-invalid-value-to-enum-class range b min to b max defined as follows Let K be 1 for a two's complement representation and 0 for a one's complement or sign..
Why is unsigned integer overflow defined behavior but signed integer overflow isn't? http://stackoverflow.com/questions/18195715/why-is-unsigned-integer-overflow-defined-behavior-but-signed-integer-overflow-is differ according to the implementation one's complement two's complement sign magnitude. For an unsigned type there is no.. value 2N 1 ones complement . Nowadays all processors use two's complement representation but signed arithmetic overflow remains..
Would you use num%2 or num&1 to check if a number is even? http://stackoverflow.com/questions/1949271/would-you-use-num2-or-num1-to-check-if-a-number-is-even num is either an unsigned int or a negative number with a two's complement representation. As some comments righfuly state...
http://stackoverflow.com/questions/2513525/bitwise-not-operator ~0 prints 11111111111111111111111111111111 This is the two's complement representation of 1 . Similarly System.out.println.. That is for a 32 bit unsigned int in two's complement representation ~1 2 . Further reading Two's complement..
http://stackoverflow.com/questions/3784996/why-does-left-shift-operation-invoke-undefined-behaviour-when-the-left-side-oper but also what happens with the rest of the bits e.g. with two's complement representation which is another story. share improve..
Detecting signed overflow in C/C++ http://stackoverflow.com/questions/3944505/detecting-signed-overflow-in-c-c to unsigned and performing checks by rolling your own two's complement arithmetic but I'm not really sure how to do that...
C++ performance challenge: integer to std::string conversion http://stackoverflow.com/questions/4351371/c-performance-challenge-integer-to-stdstring-conversion character set. Make sure to test your code on INT_MIN on a two's complement machine where the absolute value is not representable...
Portability of binary serialization of double/float type in C++ http://stackoverflow.com/questions/4733147/portability-of-binary-serialization-of-double-float-type-in-c should represent. This is also true for signed types is it two's compliment or something else My question is What the are techniques..
Converting from signed char to unsigned char and back again? http://stackoverflow.com/questions/5040920/converting-from-signed-char-to-unsigned-char-and-back-again this is accomplished with reinterpret_cast. Now for the two's complement representation this happens to be exactly the same.. to say that the vast majority of computers will be using two's complement making the whole issue moot for just about anywhere.. will likely only ever see systems with anything other than two's complement in very old architectures think '60s timeframe. The..
C++11 lambda capture semantics http://stackoverflow.com/questions/6181464/c11-lambda-capture-semantics
Exotic architectures the standards committees care about http://stackoverflow.com/questions/6971886/exotic-architectures-the-standards-committees-care-about architectures used today where CHAR_BIT 8 signed is not two's complement I heard Java had problems with this one . Floating..
C++ - How to print (using cout) the way a number is stored in memory? http://stackoverflow.com/questions/7349689/c-how-to-print-using-cout-the-way-a-number-is-stored-in-memory how signed unsigned numbers are stored in memory using the two's complement ~number 1 . We have a couple of exercices to do on.. binary representations in memory of the numbers after the two's complement a 00111010 it's a char so 1 byte b 00001000 it's.. number or do I have to code each step myself calculate the two's complement and then convert to binary I know the latter wouldn't..
Is it safe to use -1 to set all bits to true? http://stackoverflow.com/questions/809227/is-it-safe-to-use-1-to-set-all-bits-to-true are 1. And consider this one which will fail on a non two's complement representation unsigned int a ~0 Should have done.. has to invert all bits. Inverting that will yield 1 on a two's complement machine which is the value we need but will not yield..
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