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Newest 'numeric-limits' Questions - LavOzs.Com
Questions tagged [numeric-limits]
std::numeric_limits is a C++ standard library class that contains traits and information about the built-in numeric types, such as the maximum and minimum representable values, number of digits, and whether the it is a signed type. Access to this class is provided via the header <limits>.
Using Visual Studio Community 2019 v16.4.2 with the latest stuff it comes with on 64bit Win10.
While testing various datatype limits ran into a weird bug, numeric_limits can't distinguish between ...
Given a variable defined as
T x;
where T is a generic arithmetic type (i.e. such that std::is_arithmetic<T>::value), is there a simple expression (e.g something from std::numeric_limits) that ...
I was supposing that numeric_limits::max() on a BOOST_STRONG_TYPEDEF defined type would give the same result than on the underlying type. But the following program shows that it is not the case (...
I try to implement a meta function which checks if an integer type is a subset of another integer type. It should be platform independent and work at least with all numeric types defined by the C++ ...
The following program apparently shows an inconsistency when writing and reading on a std::stringstream a double set to "infinity", using std::numeric_limits<double>::infinity.
#include <...
I'm trying to write a test case for some corner case. For input of type int64_t, the following line won't compile:
int64_t a = -9223372036854775808LL;
The error/warning is:
error: integer constant ...
With GCC 9.1, when calling std::numeric_limits's functions with floating-point types, they return 0 in most cases.
This happens in a project I'm working on, and there is no issue with MSVC, GCC 8.3 ...
In C++11, what is the advantage of std::numeric_limits<Type>::max_digits10 returning 0 for a Type that is a reference to floating point number?
For example:
constexpr int precisionPositive(...
While using cin.ignore() in c++, it takes an argument of number of characters to consume until the delimiter occurs.
Most often I have observed the following to be used cin.ignore(numeric_limits<...
If you mistakenly do something like:
#include<limits>
int arr[3];
auto x = std::numeric_limits<decltype(arr[0])>::max();
You will get unhelpful error message from the file in the STL ...
IEEE floating point exponents are stored as unsigned integers, using a pre-defined exponent bias to offset the exponent.
The exponent bias seems to be consistently equal to numeric_limits<T>::...
I would like to know if there is a particular reason to define the macro UINT_MAX as (2147483647 * 2U + 1U) and not directly its true value (4294967295U) in the climits header file.
Thank you all.
I would like my code to only input integers. The code below does it's job correctly and asks the user for input if an integer was not used. However, after adding the code:
while ( ! ( cin >> x )...
in C++, I wonder how to get the correct answer 0.5 for "INT_MAX / (INT_MAX + INT_MAX)"? I tried cast the divisor/both divisor and dividend to long, and also cast divisor to double, all return -...