第十三周项目三 分数类中的运算符重载 （3）

/*copyright(c)2016.烟台大学计算机学院 * All rights reserved, * 文件名称：text.Cpp * 作者：舒文超 * 完成日期：2016年5月22日 * 版本号：vc++6.0 * 问题描述:定义分数的一目运算+和-，分别代表分数取正和求反，将“按位取反运算符”~重载为分数的求倒数运算。 */#include<iostream>#include<cmath>using namespace std;class CFraction{private:    int nume;  // 分子    int deno;  // 分母public:    //构造函数及运算符重载的函数声明CFraction(int nu=1,int de=1):nume(nu),deno(de) {}    void simplify();void display();    CFraction operator+(const CFraction &c);  //两个分数相加，结果要化简    CFraction operator-(const CFraction &c);  //两个分数相减，结果要化简    CFraction operator*(const CFraction &c);  //两个分数相乘，结果要化简    CFraction operator/(const CFraction &c);  //两个分数相除，结果要化简CFraction operator+(int a);  //分数加整数，结果要化简    CFraction operator-(int a);  //分数减整数，结果要化简    CFraction operator*(int a);  //分数乘整数，结果要化简    CFraction operator/(int a);  //分数除整数，结果要化简    CFraction operator+();  //取正一目运算    CFraction operator-();  //取反一目运算    CFraction operator~();  //取倒数一目运算    bool operator>(const CFraction &c);    bool operator<(const CFraction &c);    bool operator==(const CFraction &c);    bool operator!=(const CFraction &c);    bool operator>=(const CFraction &c);    bool operator<=(const CFraction &c);};void CFraction::simplify(){    int m,n,r;    n=fabs(deno);    m=fabs(nume);    while(r=m%n)     {        m=n;        n=r;    }    deno/=n;         nume/=n;    if (deno<0)     {        deno=-deno;        nume=-nume;    }}void CFraction::display(){cout<<nume<<"/"<<deno<<endl;}CFraction CFraction::operator+(const CFraction &c){    CFraction t;    t.nume=nume*c.deno+c.nume*deno;    t.deno=deno*c.deno;    t.simplify();    return t;}CFraction CFraction::operator-(const CFraction &c)  //两个分数相减，结果要化简{    CFraction c1;    c1.nume=nume*c.deno-c.nume*deno;    c1.deno=deno*c.deno;    c1.simplify();    return c1;}CFraction CFraction::operator*(const CFraction &c)  //两个分数相乘，结果要化简{CFraction c1;    c1.nume=nume*c.nume;    c1.deno=deno*c.deno;    c1.simplify();    return c1;}CFraction CFraction::operator/(const CFraction &c) {CFraction c1;    c1.nume=nume*c.deno;    c1.deno=deno*c.nume;    c1.simplify();    return c1;}bool CFraction::operator>(const CFraction &c){    int this_nume,c_nume,common_deno;    this_nume=nume*c.deno;           c_nume=c.nume*deno;    common_deno=deno*c.deno;    if ((this_nume-c_nume)*common_deno>0) return true;    return false;}bool CFraction::operator<(const CFraction &c){int nume1,nume2,deno1;    nume1=nume*c.deno;    nume2=c.nume*deno;    deno1=deno*c.deno;    if ((nume1-nume2)*deno1<0) return true;    return false;}bool CFraction::operator==(const CFraction &c){if (*this!=c) return false;    return true;}bool CFraction::operator!=(const CFraction &c){if (*this!=c) return true;    return false;}bool CFraction::operator>=(const CFraction &c){if (*this<c) return false;    return true;}bool CFraction::operator<=(const CFraction &c){if (*this>c) return false;    return true;}CFraction CFraction::operator+(int a){CFraction C;int c;c=a*deno;C.deno=deno;    C.nume=nume+c;    C.simplify();    return C;}CFraction CFraction::operator-(int a){CFraction C;int c;c=a*deno;C.deno=deno;    C.nume=nume-c;    C.simplify();    return C;}CFraction CFraction::operator*(int a){CFraction C;C.deno=deno;    C.nume=nume*a;    C.simplify();    return C;}CFraction CFraction::operator/(int a){CFraction C;C.deno=deno*a;    C.nume=nume;    C.simplify();    return C;}CFraction CFraction::operator+()  //取正一目运算{return *this;}CFraction CFraction::operator-()  //取反一目运算{CFraction C;    C.nume=-nume;    C.deno=deno;    return C;}CFraction CFraction::operator~(){CFraction C;    C.nume=deno;    C.deno=nume;   //未对原分子为0的情况进行处理    if(C.deno<0)   //保证负分数的负号在分子上    {        C.deno=-C.deno;        C.nume=-C.nume;    }    return C;}//重载函数的实现及用于测试的main()函数int main(){char c;int a,b,d;    cout<<"输入第一个分数（样例：x/y）: ";    cin>>a>>c>>b;CFraction x(a,b);    cout<<"输入第二个分数（样例：x/y）: ";cin>>a>>c>>b;CFraction y(a,b);CFraction s;cout<<"第一个分数为："<<endl;x.display();cout<<"第二个分数为："<<endl;y.display();cout<<"请输入要进行运算的整数d"<<endl;cin>>d;s=x+d;cout<<"x+d=";s.display();cout<<endl;s=x-d;cout<<"x-d=";s.display();cout<<endl;s=x*d;cout<<"x*d=";s.display();cout<<endl;s=x/d;cout<<"x/d=";s.display();cout<<endl;    s=x+y;    cout<<"x+y=";s.display();cout<<endl;    s=x-y;    cout<<"x-y=";s.display();cout<<endl;    s=x*y;    cout<<"x*y=";s.display();cout<<endl;    s=x/y;    cout<<"x/y=";s.display();cout<<endl;    if(x>y) cout<<"大于"<<endl;    if(x<y) cout<<"小于"<<endl;    if(x==y) cout<<"等于"<<endl;cout<<"-x=";s=-x;s.display();cout<<endl;    cout<<"+x=";s=+x;cout<<endl;    cout<<"x的倒数: ";s=~x;cout<<endl;    return 0;}