Playground

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import System;

public class Temperature
{
	f64 celsius;

	public:
		f64 Celsius { get => celsius; set { celsius = value; Changes += 1; } }
		f64 Fahrenheit { get => celsius * 9 / 5 + 32; }
		static i32 Changes { get; set; }
		virtual str Unit { get => "C"; }
}

public class Kelvin : Temperature
{
	public:
		override str Unit { get => "K"; }
}

Main()
{
	Temperature t = new Kelvin();
	t.Celsius = 100;
	Console.WriteLine(t.Fahrenheit + " " + Temperature.Changes + " " + t.Unit);
}

Output

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Input

What Console.ReadLine() reads, one line at a time.

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