Program Listing
#include <iostream>
#include <iomanip>
// Abstract class for temperature conversion
class TemperatureConverter {
public:
virtual void setTemperature(double temp) = 0;
virtual double toCelsius() = 0;
virtual double toFahrenheit() = 0;
};
// Concrete class for temperature conversion
class FahrenheitToCelsiusConverter : public TemperatureConverter {
private:
double temperature;
public:
void setTemperature(double temp) {
temperature = temp;
}
double toCelsius() {
return (temperature - 32) * 5.0 / 9.0;
}
double toFahrenheit() {
return temperature;
}
};
class CelsiusToFahrenheitConverter : public TemperatureConverter {
private:
double temperature;
public:
void setTemperature(double temp) {
temperature = temp;
}
double toCelsius() {
return temperature;
}
double toFahrenheit() {
return (temperature * 9.0 / 5.0) + 32;
}
};
int main() {
double temp;
char choice;
std::cout << "\n\tTemperature Converter Using Abstraction in C++\n" << std::endl;
std::cout << "\t[1] Fahrenheit to Celsius" << std::endl;
std::cout << "\t[2] Celsius to Fahrenheit" << std::endl;
std::cout << "\n\tEnter your choice: ";
std::cin >> choice;
TemperatureConverter* converter = nullptr;
if (choice == '1') {
converter = new FahrenheitToCelsiusConverter();
std::cout << "\n\tEnter temperature in Fahrenheit: ";
} else if (choice == '2') {
converter = new CelsiusToFahrenheitConverter();
std::cout << "\n\tEnter temperature in Celsius: ";
} else {
std::cerr << "\tInvalid choice. Exiting." << std::endl;
return 1;
}
std::cin >> temp;
converter->setTemperature(temp);
if (choice == '1') {
std::cout << "\n\tThe Temperature in Celsius: " <<std::fixed <<std::setprecision(2) << converter->toCelsius() << std::endl;
} else {
std::cout << "\n\tThe Temperature in Fahrenheit: " << std::fixed <<std::setprecision(2) << converter->toFahrenheit() << std::endl;
}
delete converter;
std::cout << "\n\n\tEnd of Program. Thank you for using this program." << std::endl;
return 0;
}
