试、打印点的信息和计算结果。 （3）写分数类的定义，要求在分数类中提供最简化约分、两个分数求和、求差、求积、求除的成员函数，并在main函数里进行测试、打印分数及计算结果。

以下是分数类的定义：

#include <iostream>

class Fraction {
private:
    int numerator;
    int denominator;

    int gcd(int a, int b) {
        if (b == 0) {
            return a;
        }
        return gcd(b, a % b);
    }

public:
    Fraction(int _numerator, int _denominator) : numerator(_numerator), denominator(_denominator) {
        int divisor = gcd(numerator, denominator);
        numerator /= divisor;
        denominator /= divisor;
    }

    int getNumerator() const {
        return numerator;
    }

    int getDenominator() const {
        return denominator;
    }

    Fraction operator+(const Fraction& other) const {
        int num = numerator * other.denominator + other.numerator * denominator;
        int den = denominator * other.denominator;
        return Fraction(num, den);
    }

    Fraction operator-(const Fraction& other) const {
        int num = numerator * other.denominator - other.numerator * denominator;
        int den = denominator * other.denominator;
        return Fraction(num, den);
    }

    Fraction operator*(const Fraction& other) const {
        int num = numerator * other.numerator;
        int den = denominator * other.denominator;
        return Fraction(num, den);
    }

    Fraction operator/(const Fraction& other) const {
        int num = numerator * other.denominator;
        int den = denominator * other.numerator;
        return Fraction(num, den);
    }
};

int main() {
    Fraction f1(2, 3);
    Fraction f2(3, 4);

    std::cout << "f1: " << f1.getNumerator() << "/" << f1.getDenominator() << std::endl;
    std::cout << "f2: " << f2.getNumerator() << "/" << f2.getDenominator() << std::endl;

    Fraction sum = f1 + f2;
    std::cout << "Sum: " << sum.getNumerator() << "/" << sum.getDenominator() << std::endl;

    Fraction diff = f1 - f2;
    std::cout << "Difference: " << diff.getNumerator() << "/" << diff.getDenominator() << std::endl;

    Fraction prod = f1 * f2;
    std::cout << "Product: " << prod.getNumerator() << "/" << prod.getDenominator() << std::endl;

    Fraction quotient = f1 / f2;
    std::cout << "Quotient: " << quotient.getNumerator() << "/" << quotient.getDenominator() << std::endl;

    return 0;
}

在 main 函数中，我们首先创建了两个分数 f1 和 f2，分别代表 2/3 和 3/4。

然后，我们分别调用了每个分数的 getNumerator 和 getDenominator 函数，来输出它们的分子和分母。

接下来，我们分别调用了四个运算符重载函数，来计算两个分数的和、差、积和商，并分别输出结果。

最后，我们在主函数中返回 0，表示程序运行成功结束。