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Calculator

The Calculator class allows us to do basic arithmetic.

public interface ICalculator
{
    int Add(int x, int y);
    int Minus(int x, int y);
    int Multiply(int x, int y);
    int Divide(int x, int y);
}

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We can new up a new calculator using the following code.

var calculator = new Calculator();

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Add

We can add two int parameters together.

result = calculator.Add(1, 1);
// result is 2
Console.WriteLine(result);

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Minus

We can subtract an int parameter from another.

result = calculator.Minus(1, 1);
// result is 0
Console.WriteLine(result);

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Multiply

We can multiply int parameters together.

result = calculator.Multiply(2, 2);
// result is 4
Console.WriteLine(result);

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Divide

We can divide an int numerator against an int denominator.

result = calculator.Divide(4, 2);
// result is 2
Console.WriteLine(result);

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