// editor3
#include<iostream>
using namespace std;
class Temperature
{
    private:
    double celsius;
    public:
    Temperature(double c): celsius(c){}
    void convertToFahrenheit()
    {
        if(celsius<0)
        {
            cout<<"Invalid input"<<endl;
        }
        else
        {
            double fahrenheit=(celsius*9.0/5)+32.0;
            cout<<fahrenheit<<endl;
        }
    }
};
int main()
{
    double input_celsius;
    input_celsius=-10.0;
    Temperature temp(input_celsius);
    temp.convertToFahrenheit
}