dog_years0

// My dog-years attempt, including a check for non existing dog and the possibilities of partial years.

#include <iostream>

int main() {
    std::string dog_name;
    double dog_age, later_years, human_years;

    // first two years of dog's life == 21 human years
    double early_years = 21;

    //ask for age and name
    std::cout << "What's the name of your dog?\n";
    std::cin >> dog_name;
    std::cout << "How old is your dog in normal years?\n";
    std::cin >> dog_age;

    if (dog_age <= 0) {
        //Dog does not exist as he is 0 years old or younger.
        std::cout << "Your dog does not exist yet. :/\n";
    }
    else if (dog_age < 2) {
        // multiply one early year with the actual dog age
        human_years = early_years / 2 * dog_age;
        std::cout << "Woof! My name is " << dog_name << ", I am " << human_years << " years old in human years.\n";
    }
    else {
        // subtract 2 early years and multiply by 4 to get the later years
        later_years = (dog_age - 2) * 4;
        // combine later and early years
        human_years = early_years + later_years;
        std::cout << "Woof! My name is " << dog_name << ", I am " << human_years << " years old in human years.\n";
    };
}