nan.cpp

// Example program
#include <iostream>
#include <string>
#include <limits>

int main()
{
    float x = std::numeric_limits<float>::max() / 1.5f;
    float y = x;
    float sum = x + y;
    
    float m_x = -x;
    float m_y = -y;
    float m_sum = m_x + m_y;
    
    float sum2 = sum + m_sum;
    
    
    std::cout << "max float is " << std::numeric_limits<float>::max() << std::endl;
    
    std::cout << "x " << x << std::endl;
    std::cout << "y " << y << std::endl;
    std::cout << "sum " << sum << std::endl;
    
    std::cout << "-x " << m_x << std::endl;
    std::cout << "-y " << m_y << std::endl;
    std::cout << "(-x) + (-y) " << m_sum << std::endl;
    
    std::cout << "sum + (-sum) " << sum2 << std::endl;
}


/* prints
max float is 3.40282e+38
x 2.26855e+38
y 2.26855e+38
sum inf
-x -2.26855e+38
-y -2.26855e+38
(-x) + (-y) -inf
*/