#include <iostream.h>
#include <iomanip.h>
#include <math.h>
class complex
{
public:
complex(double r=0,double i=0){re=r;im=i}
virtual void Print();
protected:
double re,im;
};
class real:public complex
{
public:
real(double r=0):complex(r,0){}
void Print(){ cout<<re;}
};class root
{
public:
root(double m1,double m2,double m3){a=m1;b=m2;c=m3;}
void Print();
void Solve();
protected:
double a,b,c;
};void complex::Print()
{
cout <<"("<<re<<","<<im<<"i)";
}void root ::Print()
{
cout<<"方程“;
cout<<a;
cout<<setiosflags(ios::showpos);
cout<<"*x*x";
cout<<b<<"*x";
cout<<c<<"=0\n";
cout <<resetiosflags(ios::showpos);
}void::Solve()
{ Print();
cout<<"result is :"<<endl;
double delta=b*b-4*a*c;
if(fabs(delta)<1e-5)
{
real x(-b/2/a);
cout<<"\nx1=x2=";
x.Print();
}else if(delta>0){
real x1(-b/2/a+sqrt(delta)/2/a);
real x2(-b/2/a-sqrt(delta)/2/a);
cout <<"\nx1=:";
x1.Print();
cout<<"\nx2=:";
x2.Print();
}else{
complex x1(-b/2/a,sqrt(-delta)/2/a);
complex x2(-b/2/a,-sqrt(-delta)/2/a);
cout<<"\n x1=:";
x1.Print();
cout<<"\n x2=:";
x2.Print();
}
}
void main()
{ double o1,o2,o3;
cout<<"\n please input your index: a,b,c:";
cin>>o1>>o2>>o3;
root rot(o1,o2,o3);
rot.Solve();
}
#include <iomanip.h>
#include <math.h>
class complex
{
public:
complex(double r=0,double i=0){re=r;im=i}
virtual void Print();
protected:
double re,im;
};
class real:public complex
{
public:
real(double r=0):complex(r,0){}
void Print(){ cout<<re;}
};class root
{
public:
root(double m1,double m2,double m3){a=m1;b=m2;c=m3;}
void Print();
void Solve();
protected:
double a,b,c;
};void complex::Print()
{
cout <<"("<<re<<","<<im<<"i)";
}void root ::Print()
{
cout<<"方程“;
cout<<a;
cout<<setiosflags(ios::showpos);
cout<<"*x*x";
cout<<b<<"*x";
cout<<c<<"=0\n";
cout <<resetiosflags(ios::showpos);
}void::Solve()
{ Print();
cout<<"result is :"<<endl;
double delta=b*b-4*a*c;
if(fabs(delta)<1e-5)
{
real x(-b/2/a);
cout<<"\nx1=x2=";
x.Print();
}else if(delta>0){
real x1(-b/2/a+sqrt(delta)/2/a);
real x2(-b/2/a-sqrt(delta)/2/a);
cout <<"\nx1=:";
x1.Print();
cout<<"\nx2=:";
x2.Print();
}else{
complex x1(-b/2/a,sqrt(-delta)/2/a);
complex x2(-b/2/a,-sqrt(-delta)/2/a);
cout<<"\n x1=:";
x1.Print();
cout<<"\n x2=:";
x2.Print();
}
}
void main()
{ double o1,o2,o3;
cout<<"\n please input your index: a,b,c:";
cin>>o1>>o2>>o3;
root rot(o1,o2,o3);
rot.Solve();
}
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