package jisuanji;
public class Calculator {
    // 加法
    public double add(double a, double b) {
        return a + b;
    }

    // 减法
    public double subtract(double a, double b) {
        return a - b;
    }

    // 乘法
    public double multiply(double a, double b) {
        return a * b;
    }

    // 除法
    public double divide(double a, double b) {
        if (b != 0) {
            return a / b;
        } else {
            throw new IllegalArgumentException("除数不能为零");
        }
    }

    // 取余
    public double modulus(double a, double b) {
        return a % b;
    }
}