## Is it possible to read infinity or NaN values using input streams?

I have some input to be read by a input filestream (for example):

-365.269511 -0.356123 -Inf 0.000000

When I use std::ifstream mystream; to read from the file to some

double d1 = -1, d2 = -1, d3 = …

## Using numeric_limits::max() in constant expressions

I would like to define inside a class a constant which value is the maximum possible int. Something like this:

class A
{

static const int ERROR_VALUE = std::numeric_limits::max(…

## Why does numeric_limits::min return a negative value for int but positive values for float/double?

Why does numeric_limits::min return a negative value for int, but positive values for e.g. float and double?

#include
#include

using namespace std;

int main() {
cout …

## Why is std::numeric_limits::max() a function?

In the standard library of C++ the value std::numeric_limits::max() is specified as a function. Further properties of a specific type are given as constants (like std::numeric_limits:…

## Negative infinity

I’m trying to figure out how to assign the value of negative infinity to a float or double variable. It seems that including the standard library limits, I can get the infinity representation, and I …

## Why is FLT_MIN equal to zero?

limits.h specifies limits for non-floating point math types, e.g. INT_MIN and INT_MAX. These values are the most negative and most positive values that you can represent using an int.

In float.h, …

## Why is the maximum value of an unsigned n-bit integer 2^n-1 and not 2^n?

The maximum value of an n-bit integer is 2n-1. Why do we have the “minus 1”? Why isn’t the maximum just 2n?

## ‘numeric_limits’ was not declared in this scope, no matching function for call to ‘max()’

I compiled this code at home on my mac w/ xcode and there was no provblem. I compile it at school with g++ on linux and I get these errors:

:‘numeric_limits’ is not a member of std
:expected primary-…

## Syntax error with std::numeric_limits::max

I have class struct definition as follows:

#include

struct ifxHeapStatsFilters
{
ifxHeapStatsFilters(size_t minValue_ = 0, size_t maxValue_ = std::numeric_limits::…

## Creating complex infinity with std::complex in C++

I’m trying to create a complex infinity equal to Inf+Inf*j where j is the complex variable. When I do this :

#include
#include using std;

complex