c_cpp 将华氏温度转换为摄氏温度或Vise-Versa

Posted 2021-05-14

#include <iostream>
#include <cctype>

int main()
{
    int temp;
    char unit;

    std::cout << "Please enter a temperature: ";
    std::cin >> temp;
    std::cout << "To convert to Celsius press 'c' or Fahrenheit press 'f': ";
    std::cin >> unit;

    if ( isupper(unit) )
    {
        unit = tolower(unit);
    }

    if (unit == 'c')
    {
        temp = (temp - 32)  / 9.0 * 5.0;
        std::cout << temp << " degrees Celsius\n";
    }
    else if (unit == 'f')
    {
        temp = 9.0 / 5.0 * temp + 32;
        std::cout << temp << " degrees Fahrenheit\n";
    }
    else
    {
        std::cout << "Sorry that unit of measure isn't recognized.\n";
    }

    return 0;
}