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Program.cs
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Program.cs
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/*
* このプログラムには、架空の機能が含まれます。
*/
using System;
namespace MathConsole
{
class Program
{
static void Main(string[] args)
{
NaturalNumber n = 3; // OK
NaturalNumber m = -1; // Compilation Error
Console.WriteLine(Divide(1, n)); // OK
Console.WriteLine(Divide(1, 0)); // Compilation Error
}
static double Divide(double d, double divisor) where divisor != 0
{
return d / divisor;
}
}
public class NaturalNumber
{
int i;
public NaturalNumber(int i) where i > 0
{
this.i = i;
}
public override string ToString()
{
return i.ToString();
}
public static implicit operator int(NaturalNumber n)
{
return n.i;
}
public static implicit operator NaturalNumber(int i)
{
return new NaturalNumber(i);
}
}
}