I work with a lot of calculation code written in c++ with high-performance and low memory overhead in mind. It uses STL containers (mostly std::vector) a lot, and iterates over that containers almost in every single function. The iterating code looks like this: But it produces the signed/unsigned mismatch warning (C4018 in Visual Studio). Replacing … Read more
I don’t believe so. Once you want to go bigger than a signed long, I think BigInteger is the only (out of the box) way to go.
Currently, I am using signed values, -2^63 to 2^63-1. Now I need the same range (2 * 2^64), but with positive values only. I found the java documentations mentioning unsigned long, which suits this use. I tried to declare 2^64 to a Long wrapper object, but it still loses the data, in other words, it … Read more
Java does not have a datatype for unsigned integers. You can define a long instead of an int if you need to store large values. You can also use a signed integer as if it were unsigned. The benefit of two’s complement representation is that most operations (such as addition, subtraction, multiplication, and left shift) are identical on a binary level for … Read more
unsigned really is a shorthand for unsigned int, and so defined in standard C.
The “signed” indicator means that the item can hold positive or negative values. “Unsigned” doesn’t distinguish between positive and negative values. A signed/unsigned variable can refer to any numerical data type (such as binary, integer, float, etc). Each data type might be further defined as signed or unsigned. For example, an 8-bit signed binary could … Read more
%lu is the correct format for unsigned long. Sounds like there are other issues at play here, such as memory corruption or an uninitialized variable. Perhaps show us a larger picture?
How do I see the type of a variable whether it is unsigned 32 bit, signed 16 bit, etc.? How do I view it?
Java does not have a datatype for unsigned integers. You can define a long instead of an int if you need to store large values. You can also use a signed integer as if it were unsigned. The benefit of two’s complement representation is that most operations (such as addition, subtraction, multiplication, and left shift) are identical on a binary level for … Read more
Am I correct to say the difference between a signed and unsigned integer is: Unsigned can hold a larger positive value and no negative value. Unsigned uses the leading bit as a part of the value, while the signed version uses the left-most-bit to identify if the number is positive or negative. Signed integers can … Read more