类的作业及答案.doc

《类的作业及答案.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、//编程：建立一个分数类。分数类的数据成员包括分子和分母，操作包括显示、输入、约分、通分、比较、加、减、乘、除、求相反数。#include#includeusingnamespacestd;classfraction{intabove;//分子intbelow;//分母voidreduction();//约分voidmakeCommond(fraction&);//通分public:fraction(inta=0,intb=1){//构造函数above=a;below=b;}fractionadd(fraction);//两分数相

2、加fractionsub(fraction);//本分数减去实参分数fractionmul(fraction);//两分数相乘fractiondiv(fraction);//本分数除以实参分数fractionreciprocal();//求倒数boolequal(fraction);//等于运算boolgreaterThan(fraction);//大于运算boollessThan(fraction);//小于运算voiddisplay();//显示分数voidinput();//输入分数};voidfraction::reduction(){//约分先求最大公约

3、数inta,b,temp;if(below<0){above=-above;below=-below;}a=abs(above);b=abs(below);while(a%b){//欧几里德法求最大公约数temp=a;a=b;b=temp%b;}above/=b;below/=b;}voidfraction::makeCommond(fraction&b){inttemp;reduction();b.reduction();above*=b.below;b.above*=below;temp=below*b.below;below=b.below=temp;}fr

4、actionfraction::add(fractionb){fractiontemp;makeCommond(b);//通分temp.above=above+b.above;temp.below=below;temp.reduction();//约分returntemp;}fractionfraction::sub(fractionb){fractiontemp;makeCommond(b);//通分temp.above=above-b.above;temp.below=below;temp.reduction();//约分returntemp;}fractio

5、nfraction::mul(fractionb){fractiontemp;temp.above=above*b.above;temp.below=below*b.below;temp.reduction();//约分returntemp;}fractionfraction::div(fractionb){fractiontemp;if(b.above==0){cout<<"零不能作除数！"<

6、returntemp;}fractionfraction::reciprocal(){fractiontemp;temp.above=below;temp.below=above;temp.reduction();//约分returntemp;}boolfraction::equal(fractionb){makeCommond(b);//通分return(above==b.above);}boolfraction::greaterThan(fractionb){makeCommond(b);//通分return(above>b.above);}boolfract

7、ion::lessThan(fractionb){makeCommond(b);//通分return(above>above>>below;if(below==0)cout<<"分母不可为零！"<

8、ntmai