分数四则运算 C++代码

以下是一个简单的分数四则运算的 C++ 代码，可以进行加、减、乘、除和比较运算：

#include <iostream>
#include <cmath>

using namespace std;

class Fraction {
private:
    int numerator;  // 分子
    int denominator;  // 分母

public:
    Fraction(int n, int d) {
        numerator = n;
        denominator = d;
    }

    void reduce() {
        int gcd = __gcd(numerator, denominator);
        numerator /= gcd;
        denominator /= gcd;
    }

    Fraction operator+(const Fraction& other) {
        int n = numerator * other.denominator + other.numerator * denominator;
        int d = denominator * other.denominator;
        Fraction result(n, d);
        result.reduce();
        return result;
    }

    Fraction operator-(const Fraction& other) {
        int n = numerator * other.denominator - other.numerator * denominator;
        int d = denominator * other.denominator;
        Fraction result(n, d);
        result.reduce();
        return result;
    }

    Fraction operator*(const Fraction& other) {
        int n = numerator * other.numerator;
        int d = denominator * other.denominator;
        Fraction result(n, d);
        result.reduce();
        return result;
    }

    Fraction operator/(const Fraction& other) {
        int n = numerator * other.denominator;
        int d = denominator * other.numerator;
        Fraction result(n, d);
        result.reduce();
        return result;
    }

    bool operator<(const Fraction& other) {
        return numerator * other.denominator < other.numerator * denominator;
    }

    bool operator>(const Fraction& other) {
        return numerator * other.denominator > other.numerator * denominator;
    }

    void print() {
        cout << numerator << "/" << denominator << endl;
    }
};

int main() {
    Fraction a(1, 2);
    Fraction b(3, 4);
    Fraction c = a + b;
    c.print();
    c = a - b;
    c.print();
    c = a * b;
    c.print();
    c = a / b;
    c.print();
    cout << (a < b) << endl;
    cout << (a > b) << endl;
    return 0;
}

注意，这个代码只是一个简单的示例，没有考虑到分数的负数、零、约分等情况。在实际应用中，需要根据具体情况进行修改和完善。