rational.cpp

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#include "rational.h"
void youli()    
{
	Rational r1(5L);
	Rational r2,r3;
	float f;
	cout<<"1.整数5用有理数表示为:"<<r1<<endl;
	cout<<"2.输入一个有理数:";
	cin>>r1;
	f=float(r1);
	cout<<"等效的浮点数是:"<<f<<endl;
	cout<<"3.输入两个有理数:";
	cin>>r1>>r2;
	cout<<"Reaults:"<<r1+r2<<"(+)"<<r1-r2<<"(-)"<<r1*r2<<"(*)"<<r1/r2<<"(/)"<<endl;
	if (r1<r2)
		cout<<"有理数"<<r1<<"小于有理数"<<r2<<endl;
	else if(r1==r2)
	    cout<<"有理数"<<r1<<"等于有理数"<<r2<<endl;
    else
		cout<<"有理数"<<r1<<"大于有理数"<<r2<<endl;
	cout<<"4.输入一个浮点数:";
	cin>>f;
	r1=f;
	cout<<"转换成有理数:"<<r1<<endl;
	f=r1;
	cout<<"再转换为有理数"<<f<<endl;
}