kelvin_to_celsius.cpp File Reference

Conversion from Kelvin to Celsius degrees. More...

#include <cassert>
#include <cmath>
#include <iostream>

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Namespaces
namespace	others
	for vector

Functions
bool	others::are_almost_equal (double a, double b, double absolute_tolerance=0.0001)
	Compare two floating point numbers with a certain tolerance. This is needed as with some values, the result (e.g.: -196.15) might be a bit lower (in this case, -196.499999...).
double	others::kelvin_to_celsius (double temperature_in_k)
	Conversion from Kelvin to Celsius algorithm.
static void	tests ()
	Self-test implementations.
int	main ()
	Main function.

Detailed Description

Conversion from Kelvin to Celsius degrees.

The algorithm consists on converting a Kelvin degree value to a Celsius value. The formula to convert a Kelvin to a Celsius value is:

\[ C = K - 273.15 \]

where:

• C is the Celsius temperature
• K is the Kelvin temperature

Check out Kelvin and Celsius on Wikipedia for more information about their story, how do they work, when and why they should be used, etc..

Author

David Leal

Function Documentation

main()

int main

(

void

)

Main function.

Returns

0 on exit

           {
    tests();  // run self-test implementations
    return 0;
}

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tests()

static void tests ( )

static

Self-test implementations.

Returns

void

                    {
    assert(others::are_almost_equal(others::kelvin_to_celsius(230), -43.15));
    assert(others::are_almost_equal(others::kelvin_to_celsius(512), 238.85));
    assert(others::are_almost_equal(others::kelvin_to_celsius(55), -218.15));
    assert(others::are_almost_equal(others::kelvin_to_celsius(77), -196.15));
    assert(others::are_almost_equal(others::kelvin_to_celsius(9.78), -263.37));
    assert(others::are_almost_equal(others::kelvin_to_celsius(15), -258.15));
    assert(others::are_almost_equal(others::kelvin_to_celsius(273.15), 0));
 
    std::cout << "All tests have successfully passed!\n";
}

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