在main前面打一個斷電，單步調試，整個程序更易理解。

#include<iostream> #include<string> #include<stdlib.h> class Rational { public:Rational(int num, int denom);//num 分子 denom 分母Rational operator+(Rational rhs);//rhs右操作數Rational operator-(Rational rhs);Rational operator*(Rational rhs);Rational operator/(Rational rhs);void print();private:void normalize();//對分數的簡化int numerator;//分子int denominator;//分母 }; Rational::Rational(int num, int denom) {numerator = num;denominator = denom;normalize(); } //化簡 void Rational::normalize() {//分母一定為正if (denominator < 0){numerator = (-1)*numerator;denominator = (-1)*denominator;}//歐幾里得算法int a = abs(numerator);int b = abs(denominator);//求最大公因數while (b > 0){int t = a % b;a = b;b = t;}//分子分母分別除以最大公因數numerator = numerator / a;denominator = denominator / a; } //加 Rational Rational::operator+(Rational rhs) {int a = numerator;int b = denominator;int c = rhs.numerator;int d = rhs.denominator;int e = a * d + c * b;int f = b * d;return Rational(e, f); } //減：減一個數等于加上這個數的相反數 Rational Rational::operator-(Rational rhs) {rhs.numerator = -rhs.numerator;Rational result = this->operator+(rhs);return result; } //乘 Rational Rational::operator*(Rational rhs) {int a = numerator;int b = denominator;int c = rhs.numerator;int d = rhs.denominator;int e = a * c;int f = b * d;return Rational(e, f); } //除 Rational Rational::operator/(Rational rhs) {int t = rhs.numerator;rhs.numerator = rhs.denominator;rhs.denominator = t;Rational result = this->operator*(rhs);return result; } //打印 void Rational::print() {if (numerator%denominator == 0){std::cout << numerator / denominator;}else std::cout << numerator << "/" << denominator; } int main() {//定義兩個數Rational f1(-2, 3);Rational f2(3, 2);//加法Rational res = f1 + f2;//f1.+f2，f1是重載運算符的對象本身f1.print();std::cout << " + ";f2.print();std::cout << " = ";res.print();std::cout << std::endl << std::endl;//減法res = f1 - f2;//f1.-f2，f1是重載運算符的對象本身f1.print();std::cout << " - ";f2.print();std::cout << " = ";res.print();std::cout << std::endl << std::endl;//乘法res = f1 * f2;//f1./f2，f1是重載運算符的對象本身f1.print();std::cout << " * ";f2.print();std::cout << " = ";res.print();std::cout << std::endl << std::endl;//除法res = f1 / f2;//f1./f2，f1是重載運算符的對象本身f1.print();std::cout << " ÷ ";f2.print();std::cout << " = ";res.print();std::cout << std::endl << std::endl;system("pause");}

總結

以上是生活随笔為你收集整理的C++运算符重载 实现有理数（分数）的加减法的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。