第九周C++实验报告(三)
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- #include <iostream>
- using namespace std;
- int gcd(int m, int n);
- class CFraction
- {
- private:
- int nume;
- int deno;
- public:
-
- CFraction(int nu=0,int de=1);
- void Simplify();
- void output();
- bool operator > (CFraction &t);
- bool operator < (CFraction &t);
- bool operator >= (CFraction &t);
- bool operator <= (CFraction &t);
- bool operator == (CFraction &t);
- bool operator != (CFraction &t);
- CFraction operator+(CFraction &c);
- CFraction operator-(CFraction &c);
- CFraction operator*(CFraction &c);
- CFraction operator/(CFraction &c);
- CFraction operator-();
- friend ostream &operator << (ostream &,CFraction &);
- friend istream &operator >> (istream &,CFraction &);
- };
-
- istream &operator >> (istream &input,CFraction &c)
- {
- input>>c.nume>>c.deno;
- return input;
- }
-
- ostream &operator << (ostream &output,CFraction &c)
- {
- output<<c.nume<<'/'<<c.deno<<endl;
- return output;
- }
-
- CFraction::CFraction(int nu,int de)
- {
- if (de!=0)
- {
- nume=nu;
- deno=de;
- }
- else
- {
- cerr<<"初始化中发生错误,程序退出\n";
- exit(0);
- }
- }
- void CFraction::Simplify()
- {
- int n;
- if(nume<0)
- {
- n=gcd(-nume,deno);
- }
- else
- {
- n=gcd(nume,deno);
- }
- nume=nume/n;
- deno=deno/n;
- }
-
- int gcd(int m, int n)
- {
- int r;
- if (m<n){r=m;m=n;n=r;}
- while(r=m%n)
- {
- m=n;
- n=r;
- }
- return n;
- }
-
- bool CFraction::operator > (CFraction &t)
- {
- CFraction c2,c3;
- c2.nume=nume*t.deno ;
- c3.nume=t.nume*deno;
- if(c2.nume>c3.nume )
- return true;
- else
- return false;
- }
-
- bool CFraction::operator < (CFraction &t)
- {
- CFraction c2,c3;
- c2.nume=nume*t.deno ;
- c3.nume=t.nume*deno;
- if(c2.nume<c3.nume )
- return true;
- else
- return false;
- }
-
- bool CFraction::operator >= (CFraction &t)
- {
- CFraction c1;
- c1.nume=nume;
- c1.deno=deno;
- if (c1<t)
- return false;
- return true;
- }
-
- bool CFraction::operator <= (CFraction &t)
- {
- CFraction c1;
- c1.nume=nume;
- c1.deno=deno;
- if(c1>t)
- return false;
- return true;
- }
- bool CFraction::operator == (CFraction &t)
- {
- CFraction c1;
- c1.nume=nume;
- c1.deno=deno;
- if (c1<t)
- return false;
- if (c1>t)
- return false;
- return false;
- }
-
- bool CFraction::operator != (CFraction &t)
- {
- CFraction c1;
- c1.nume=nume;
- c1.deno=deno;
- if (c1==t)
- return false;
- return true;
- }
-
- CFraction CFraction::operator+(CFraction &c)
- {
- CFraction c2,c3,c4;
- c2.nume=nume*c.deno ;
- c3.nume=c.nume *deno;
- c2.deno=deno*c.deno ;
- c3.deno=c.deno *deno;
- c4.nume=c2.nume +c3.nume ;
- c4.deno=c2.deno ;
- c4.Simplify ();
- return c4;
- }
-
- CFraction CFraction::operator-(CFraction &c)
- {
- CFraction c2,c3,c4;
- c2.nume=nume*c.deno ;
- c3.nume=c.nume*deno;
- c2.deno=deno*c.deno ;
- c3.deno=c.deno*deno;
- c4.nume=c2.nume-c3.nume ;
- c4.deno=c2.deno ;
- c4.Simplify ();
- return c4;
- }
-
- CFraction CFraction::operator*(CFraction &c)
- {
- CFraction c2,c3,c4;
- c2.nume=nume*c.nume ;
- c2.deno=deno*c.deno ;
- c2.Simplify();
- return c2;
- }
-
- CFraction CFraction::operator/(CFraction &c)
- {
- CFraction c2,c3;
- c2.nume=c.deno ;
- c2.deno=c.nume ;
- c3.nume=nume*c2.nume ;
- c3.deno=deno*c2.deno ;
- c3.Simplify ();
- return c3;
- }
-
- CFraction CFraction::operator-()
- {
- CFraction c2;
- c2.nume=nume;
- c2.deno=deno;
- c2.Simplify ();
- if(c2.nume<0 || c2.deno<0)
- {
- if(c2.nume <0)
- {
- c2.nume=-nume;
- }
- else
- {
- c2.deno=-deno;
- }
- }
- else
- {
- c2.nume=-nume;
- c2.deno=deno;
- }
- return c2;
- }
-
-
- void main()
- {
- CFraction c1,c2,c;
- cout<<"请您输入一个分数c1:(以a b的形式输入)";
- cin>>c1;
- cout<<"请您输入一个分数c1:(以a b的形式输入)";
- cin>>c2;
- cout<<"c1为:";
- cout<<c1;
- cout<<"c2为:";
- cout<<c2;
- cout<<"下面比较两个时间大小:\n";
- if (c1>c2) cout<<"c1>c2"<<endl;
- if (c1<c2) cout<<"c1<c2"<<endl;
- if (c1==c2) cout<<"c1=c2"<<endl;
- if (c1!=c2) cout<<"c1≠c2"<<endl;
- if (c1>=c2) cout<<"c1≥c2"<<endl;
- if (c1<=c2) cout<<"c1≤c2"<<endl;
- cout<<endl;
- cout<<"c1+c2的数值为:";
- c=c1+c2;
- cout<<c;
- cout<<endl;
- cout<<"c1-c2的数值为:";
- c=c1-c2;
- cout<<c;
- cout<<endl;
- cout<<"c1*c2的数值为:";
- c=c1*c2;
- cout<<c;
- cout<<endl;
- cout<<"c1/c2的数值为:";
- c=c1/c2;
- cout<<c;
- cout<<endl;
- cout<<"对c1取反的结果为:";
- c=-c1;
- cout<<c;
- cout<<endl;
- }