小编给大家分享一下C++有理数表达和计算的示例分析,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
#ifndef Rational_hpp #define Rational_hpp #include <stdio.h> #include <string> using namespace std; class Radtional{ public: Radtional(); Radtional(int numerator,int denominator); int getNumerator()const; int getDemominator()const; Radtional add(const Radtional& secondRational); Radtional sub(const Radtional& secondRational); Radtional mult(const Radtional& secondRational); Radtional div(const Radtional& secondRational); int compareTo(const Radtional& secondRational); bool equals(const Radtional& secondRational); int intValue(); double doubleValue(); string toString(); private: int numerator,denominator; static int gcd(int n,int d); }; #endif /* Rational_hpp */
#include "Rational.hpp" #include <sstream> #include <cstdlib> Radtional::Radtional(){ numerator = 0; denominator = 1; } Radtional::Radtional(int numerator,int denominator) { int factor = gcd(numerator, denominator); this->numerator = ((numerator>0) ? 1: -1)*abs(numerator)/factor; this->denominator = abs(denominator)/factor; } int Radtional::getNumerator()const{ return numerator; } int Radtional::getDemominator()const{ return denominator; } int Radtional::gcd(int n, int d){ int n1 = abs(n); int n2 = abs(d); int gcd =1; for (int i = 1; i<=n1&&i<=n2; i++) { if (n1%i==0&&n2%i==0) { gcd = i; } } return gcd; } Radtional Radtional::add(const Radtional& secondRational){ int n = numerator*secondRational.getDemominator()+denominator*secondRational.getNumerator(); int d = denominator * secondRational.getDemominator(); return Radtional(n,d); } Radtional Radtional::sub(const Radtional &secondRational){ int n = numerator * secondRational.getDemominator() - denominator* secondRational.getNumerator(); int d = denominator * secondRational.getDemominator(); return Radtional(n,d); } Radtional Radtional::mult(const Radtional &secondRational){ int n = numerator * secondRational.getNumerator(); int d = denominator * secondRational.getDemominator(); return Radtional(n,d); } Radtional Radtional::div(const Radtional &secondRational){ int n =numerator * secondRational.getDemominator(); int d =denominator * secondRational.getNumerator(); return Radtional(n,d); } int Radtional::compareTo(const Radtional &secondRational){ Radtional temp =sub(secondRational);//两值相减 if (temp.getNumerator()<0) { return -1; } else if (temp.getNumerator()==0){ return 0; } else return 1; } bool Radtional::equals(const Radtional &secondRational){ if (compareTo(secondRational)==0) { return true; } else return false; } int Radtional::intValue(){ return getNumerator()/getDemominator(); } double Radtional::doubleValue(){ return 1.0*getNumerator()/getDemominator(); } string Radtional::toString(){ stringstream ss; ss<<numerator; if (denominator>1) { ss<<"/"<<denominator; } return ss.str(); }
简单测试
#include <iostream> #include "Rational.hpp" int main(int argc, const char * argv[]) { // insert code here... Radtional a(3,2); Radtional b(2,5); Radtional c(1,3); Radtional d(2,6); cout<<a.toString()<<" + "<<b.toString()<<"="<<(a.add(b)).toString()<<endl; cout<<a.toString()<<" - "<<b.toString()<<"="<<(a.sub(b)).toString()<<endl; cout<<a.toString()<<" * "<<b.toString()<<"="<<(a.mult(b)).toString()<<endl; cout<<a.toString()<<" / "<<b.toString()<<"="<<(a.div(b)).toString()<<endl; cout<<c.toString()<<" - "<<a.toString()<<"="<<(c.sub(a)).toString()<<endl; cout<<c.toString()<<"的int转换为"<<c.intValue()<<endl; cout<<c.toString()<<"的double转换为"<<c.doubleValue()<<endl; cout<<c.toString()<<"和"<<a.toString()<<"比较结果"<<c.compareTo(a)<<endl; cout<<c.toString()<<"和"<<d.toString()<<"比较结果"<<c.compareTo(d)<<endl; cout<<b.toString()<<"和"<<a.toString()<<"比较结果"<<b.compareTo(a)<<endl; return 0; }
测试结果
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