conversion.cc

#include <iostream>

double toKelvin(double value, char unit) {
    switch (srcUnit) {
        case 'C':
            return num + 273.16;
        case 'F':
            return ((num - 32) / 1.8) + 273.16;
        case 'K':
            return num;
        case 'R':
            return ((num - 491.67) / 1.8) + 273.16;
        default:
            std::cout << "Please enter a valid conversion unit!";
    }
}

double fromKelvin(double value, char unit) {
    switch (dstUnit) {
        case 'C':
            return num - 273.16;
        case 'F':
            return (1.8 * (num - 273.16)) + 32;
        case 'K':
            return num;
        case 'R':
            return (1.8 * (num - 273.16)) + 491.67;
        default:
            std::cout << "Please enter a valid conversion unit!";
    }
}

int main() {
    double num;
    char srcUnit;
    char dstUnit;

    std::cout << "Please enter a number: ";
    std::cin >> num;

    std::cout << "Please enter the source srcUnit: ";
    std::cin >> srcUnit;

    std::cout << "Please enter the destination srcUnit: ";
    std::cin >> dstUnit;

    double kelvin = toKelvin(num, srcUnit);
    double result = fromKelvin(kelvin, dstUnit);
    std::cout << "Result: " << result << " " << dstUnit;

    return 0;
}