c++ Programming Glossary: complementHow 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 I have written a while ago for fun. It uses a two's complement representation and implements addition using repeated shifts..
Does the size of an int depend on the compiler and/or processor? http://stackoverflow.com/questions/2331751/does-the-size-of-an-int-depend-on-the-compiler-and-or-processor is absolutely free to implement int as a 71 bit 1's complement signed integral type that occupies 128 bits of memory using..
What happens if I assign a negative value to an unsigned variable? http://stackoverflow.com/questions/2711522/what-happens-if-i-assign-a-negative-value-to-an-unsigned-variable was assigned a strange value Could it be that some 2's complement value gets assigned to nVal c integer share improve this.. bits used to represent the unsigned type . Note In a two 䏭 complement representation this conversion is conceptual and there is no..
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++? http://stackoverflow.com/questions/3457967/what-belongs-in-an-educational-tool-to-demonstrate-the-unwarranted-assumptions-p pointers sizeof long sizeof void EXPECT 06 integers are 2 complement and wrap around int_max 1 int_min EXPECT 07 integers are 2 complement.. and wrap around int_max 1 int_min EXPECT 07 integers are 2 complement and always wrap around INT_MAX 1 INT_MIN EXPECT 08 overshifting..
http://stackoverflow.com/questions/3784996/why-does-left-shift-operation-invoke-undefined-behaviour-when-the-left-side-oper what happens with the rest of the bits e.g. with two's complement representation which is another story. share improve this answer..
Is `long` guaranteed to be at least 32 bits? http://stackoverflow.com/questions/4329777/is-long-guaranteed-to-be-at-least-32-bits of signed negative numbers it has to either be twos complement and require 32 bits of storage in total or it has an explicit..
C++ performance challenge: integer to std::string conversion http://stackoverflow.com/questions/4351371/c-performance-challenge-integer-to-stdstring-conversion set. Make sure to test your code on INT_MIN on a two's complement machine where the absolute value is not representable. Ideally..
http://stackoverflow.com/questions/5416414/signed-unsigned-comparisons bits used to represent the unsigned type . Note In a two 䏭 complement representation this conversion is conceptual and there is no..
http://stackoverflow.com/questions/589575/size-of-int-long-etc char 127 to 127 note not 128 to 127 this accommodates 1's complement platforms unsigned char 0 to 255 plain char 127 to 127 or 0..
Exotic architectures the standards committees care about http://stackoverflow.com/questions/6971886/exotic-architectures-the-standards-committees-care-about used today where CHAR_BIT 8 signed is not two's complement I heard Java had problems with this one . Floating point is.. Univac software. Key points 36 bit words CHAR_BIT 9 ones complement 72 bit non IEEE floating point separate address space for code..
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 unsigned numbers are stored in memory using the two's complement ~number 1 . We have a couple of exercices to do on paper and.. representations in memory of the numbers after the two's complement a 00111010 it's a char so 1 byte b 00001000 it's a char so 1.. 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 take so..
Why does integer overflow on x86 with GCC cause an infinite loop? http://stackoverflow.com/questions/7682477/why-does-integer-overflow-on-x86-with-gcc-cause-an-infinite-loop g or gcc when compiling this gives you well defined twos complement overflow semantics but can hurt performance. share improve..
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 1. And consider this one which will fail on a non two's complement representation unsigned int a ~0 Should have done ~0u The reason.. 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 1 on another.. but will not yield 1 on another representation. On a one's complement machine it yields zero. Thus on a one's complement machine the..
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