In this exercise you will create a program that will be used to convert Fahrenheit temperatures to Celsius and Kelvin temperatures through the use of two functions.
For this program, assume that temperature will be represented as a double value.
Begin by defining the function prototypes for the functions fahrenheit_to_celsius and fahrenheit_to_kelvin which are both passed a double value and return a double value.
Now, at the bottom of the file, write the full definitions of both functions.
The function fahrenheit_to_celsius is passed a Fahrenheit temperature and returns a rounded Celsius temperature. You may use the <cmath> function round in order to round the return value. The formula to convert Fahrenheit to Celsius is (5.0/9.0)*(temperature - 32).
The function fahrenheit_to_kelvin is passed a Fahrenheit temperature and returns a rounded Kelvin temperature. The formula to convert Fahrenheit to Kelvin is (5.0/9.0)*(temperature - 32) + 273.
Remember the rules of PEMDAS when defining the body of your functions.
Now, from the temperature_conversion function, declare and initialize the variables celsius_temperature and kelvin_temperature by calling the appropriate functions which you have just defined and passing the variable fahrenheit_temperature.
You do not need to declare or initialize fahrenheit_temperature as it is already available to you as a parameter of the temperature_conversion function.
You can find my solution by clicking on the solution.txt file on the left pane. But please make sure you give it a go yourself first, and only check the solution if you really get stuck.
#include "gtest/gtest.h"
#include "helpers/iohelper.h"
double fahrenheit_to_celsius(double);
double fahrenheit_to_kelvin(double);
void temperature_conversion(double);
namespace {
class Evaluate : public ::testing::Test {};
TEST_F(Evaluate, ExampleTest) {
EXPECT_EQ(-40.0, fahrenheit_to_celsius(-40.0));
EXPECT_EQ(-18.0, fahrenheit_to_celsius(0.0));
EXPECT_EQ(0.0, fahrenheit_to_celsius(32.0));
EXPECT_EQ(233.0, fahrenheit_to_kelvin(-40));
EXPECT_EQ(255.0, fahrenheit_to_kelvin(0.0));
EXPECT_EQ(273.0, fahrenheit_to_kelvin(32.0));
std::pair output = CAPTURE_OUTPUT(temperature_conversion(89.0));
std::string stdout = output.first;
EXPECT_EQ("The fahrenheit temperature 89 degrees is equivalent to 32 degrees celsius and 305 degrees kelvin.", stdout);
}
} // namespace
#include
#include
using namespace std;
//----DO NOT MODIFY THE CODE ABOVE THIS LINE----
//----WRITE YOUR FUNCTION PROTOTYPES BELOW THIS LINE----
double fahrenheit_to_celsius(double);
double fahrenheit_to_kelvin(double);
//----WRITE YOUR FUNCTION PROTOTYPES ABOVE THIS LINE----
//----DO NOT MODIFY THE CODE BELOW THIS LINE----
void temperature_conversion(double fahrenheit_temperature) {
//----DO NOT MODIFY THE CODE ABOVE THIS LINE----
//----WRITE YOUR FUNCTION CALLS BELOW THIS LINE----
double celsius_temperature = fahrenheit_to_celsius(fahrenheit_temperature);
double kelvin_temperature = fahrenheit_to_kelvin(fahrenheit_temperature);
//----WRITE YOUR FUNCTION CALLS ABOVE THIS LINE----
//----DO NOT MODIFY THE CODE BELOW THIS LINE----
cout << "The fahrenheit temperature " << fahrenheit_temperature << " degrees is equivalent to " << celsius_temperature << " degrees celsius and " << kelvin_temperature << " degrees kelvin.";
}
//----DO NOT MODIFY THE CODE ABOVE THIS LINE----
//----WRITE YOUR FUNCTION DEFINITIONS BELOW THIS LINE----
double fahrenheit_to_celsius(double temperature) {
return round(((temperature - 32)*5)/9);
}
double fahrenheit_to_kelvin(double temperature) {
return round(((temperature - 32)*5)/9 + 273);
}
//