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C++ Temperature Converter

A C++ class to convert temperatures between Kelvin, Celsius, Fahrenheit and Rankine.

Submitted By: sensui

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Views: 365

Language: C++

Last Modified: August 29, 2008

Snippet

//temperatureConverter.cpp
#include <iostream>
using namespace std;
class TemperatureConverter {
public:
enum TemperatureUnit { Kelvin, Celsius, Fahrenheit, Rankine};
private:
double kelvin;
double convertToKelvin( double temp, TemperatureUnit unit = Kelvin );
double convertFromKelvin( double temp, TemperatureUnit unit = Kelvin );
public:
explicit TemperatureConverter( double temp = 0, TemperatureUnit unit = Kelvin );
void setTemperature( double temp, TemperatureUnit unit = Kelvin );
double getTemperature( TemperatureUnit unit = Kelvin );
~TemperatureConverter();
};
double TemperatureConverter::convertToKelvin( double temp, TemperatureUnit unit ) {
double returnValue;
switch( unit ) {
case Kelvin:
returnValue = temp;
break;
case Celsius:
returnValue = temp + 273.15;
break;
case Fahrenheit:
returnValue = ( temp + 459.67 ) * 5 / 9;
break;
case Rankine:
returnValue = temp * 5 / 9;
break;
}
return returnValue;
}
double TemperatureConverter::convertFromKelvin( double temp, TemperatureUnit unit ) {
double returnValue;
switch( unit ) {
case Kelvin:
returnValue = temp;
break;
case Celsius:
returnValue = temp - 273.15;
break;
case Fahrenheit:
returnValue = temp * 9 / 5 - 459.67;
break;
case Rankine:
returnValue = temp * 9 / 5;
break;
}
return returnValue;
}
TemperatureConverter::TemperatureConverter( double temp, TemperatureUnit unit ) {
kelvin = this->convertToKelvin( temp, unit );
}
void TemperatureConverter::setTemperature( double temp, TemperatureUnit unit ) {
kelvin = this->convertToKelvin( temp, unit );
}
double TemperatureConverter::getTemperature( TemperatureUnit unit ) {
return this->convertFromKelvin( this->kelvin, unit );
}
TemperatureConverter::~TemperatureConverter() {
}
int main() {
TemperatureConverter outside, inside( 80.6, TemperatureConverter::Fahrenheit );
outside.setTemperature( 30, TemperatureConverter::Celsius );
cout << "outside: ( in Kelvin ) " << outside.getTemperature( TemperatureConverter::Kelvin ) << endl;
cout << "outside: ( in Celsius ) " << outside.getTemperature( TemperatureConverter::Celsius ) << endl;
cout << "outside: ( in Fahrenheit ) " << outside.getTemperature( TemperatureConverter::Fahrenheit ) << endl;
cout << "outside: ( in Rankine ) " << outside.getTemperature( TemperatureConverter::Rankine ) << endl;
cout << "inside: ( in Kelvin ) " << inside.getTemperature( TemperatureConverter::Kelvin ) << endl;
cout << "inside: ( in Celsius ) " << inside.getTemperature( TemperatureConverter::Celsius ) << endl;
cout << "inside: ( in Fahrenheit ) " << inside.getTemperature( TemperatureConverter::Fahrenheit ) << endl;
cout << "inside: ( in Rankine ) " << inside.getTemperature( TemperatureConverter::Rankine ) << endl;
return EXIT_SUCCESS;
}

Copy & Paste

//temperatureConverter.cpp
#include <iostream>
using namespace std;

class TemperatureConverter {
  public:
    enum TemperatureUnit { Kelvin, Celsius, Fahrenheit, Rankine};
  private:
    double kelvin;
    double convertToKelvin( double temp, TemperatureUnit unit = Kelvin );
    double convertFromKelvin( double temp, TemperatureUnit unit = Kelvin );
  public:
    explicit TemperatureConverter( double temp = 0, TemperatureUnit unit = Kelvin );
    void setTemperature( double temp, TemperatureUnit unit = Kelvin );
    double getTemperature( TemperatureUnit unit = Kelvin );
    ~TemperatureConverter();
};

double TemperatureConverter::convertToKelvin( double temp, TemperatureUnit unit ) {
  double returnValue;
  switch( unit ) {
    case Kelvin:
      returnValue = temp;
      break;
    case Celsius:
      returnValue = temp + 273.15;
      break;
    case Fahrenheit:
      returnValue = ( temp + 459.67 ) * 5 / 9;
      break;
    case Rankine:
      returnValue = temp * 5 / 9;
      break;
  }
  return returnValue;
}

double TemperatureConverter::convertFromKelvin( double temp, TemperatureUnit unit ) {
  double returnValue;
  switch( unit ) {
    case Kelvin:
      returnValue = temp;
      break;
    case Celsius:
      returnValue = temp - 273.15;
      break;
    case Fahrenheit:
      returnValue = temp * 9 / 5 - 459.67;
      break;
    case Rankine:
      returnValue = temp * 9 / 5;
      break;
  }
  return returnValue;
}

TemperatureConverter::TemperatureConverter( double temp, TemperatureUnit unit ) {
  kelvin = this->convertToKelvin( temp, unit );
}

void TemperatureConverter::setTemperature( double temp, TemperatureUnit unit ) {
  kelvin = this->convertToKelvin( temp, unit );
}

double TemperatureConverter::getTemperature( TemperatureUnit unit ) {
  return this->convertFromKelvin( this->kelvin, unit );
}

TemperatureConverter::~TemperatureConverter() {
}

int main() {
  TemperatureConverter outside, inside( 80.6, TemperatureConverter::Fahrenheit );
  outside.setTemperature( 30, TemperatureConverter::Celsius );

cout << "outside: ( in Kelvin )     " << outside.getTemperature( TemperatureConverter::Kelvin ) << endl;
  cout << "outside: ( in Celsius )    " << outside.getTemperature( TemperatureConverter::Celsius ) << endl;
  cout << "outside: ( in Fahrenheit ) " << outside.getTemperature( TemperatureConverter::Fahrenheit ) << endl;
  cout << "outside: ( in Rankine )    " << outside.getTemperature( TemperatureConverter::Rankine ) << endl;

cout << "inside: ( in Kelvin )     " << inside.getTemperature( TemperatureConverter::Kelvin ) << endl;
  cout << "inside: ( in Celsius )    " << inside.getTemperature( TemperatureConverter::Celsius ) << endl;
  cout << "inside: ( in Fahrenheit ) " << inside.getTemperature( TemperatureConverter::Fahrenheit ) << endl;
  cout << "inside: ( in Rankine )    " << inside.getTemperature( TemperatureConverter::Rankine ) << endl;

return EXIT_SUCCESS;
}