第4章作业

最新推荐文章于 2023-12-11 06:00:00 发布

csx0987

最新推荐文章于 2023-12-11 06:00:00 发布

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本文通过C++实现复数类与矩阵类的操作，包括复数的加法、减法、乘法、除法及复数与实数的运算，并演示了矩阵加法的实现。文中还展示了学生和老师类的创建及其属性获取方法。

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第一题

#include "iostream"

using std::cin;
using std::cout;
using std::endl;
using std::ostream;
using std::istream;

class Complex
{
private:


public:
  double rel;
  double img;
  Complex(double=0.0,double=0.0);
};

Complex::Complex(double x,double y)
:rel(x),img(y)
{

}

Complex operator + (Complex &c,Complex &i)
{
  return Complex(c.rel+i.rel,c.img+i.img);
}

ostream& operator <<(ostream &output,const Complex &c)
{
  output<<"("<<c.rel<<"+"<<c.img<<"i)"<<endl;
  return output;
}

int main(int argc, char const *argv[])
{
  Complex A(1,2);
  Complex B(3,2);
  cout<<(A+B)<<endl;
  return 0;
}

第二题

#include "iostream"

using std::cin;
using std::cout;
using std::endl;
using std::ostream;
using std::istream;

class Complex
{
private:
  double rel;
  double img;
public:
  Complex(double=0.0,double=0.0);
  Complex operator + (Complex &i);
  Complex operator - (Complex &i);
  Complex operator * (Complex &i);
  Complex operator / (Complex &i);
  friend ostream& operator <<(ostream &output,const Complex &c);
};

Complex::Complex(double x,double y)
:rel(x),img(y)
{

}

Complex Complex::operator + (Complex &i)
{
  return Complex(rel+i.rel,img+i.img);
}

Complex Complex::operator - (Complex &i)
{
  return Complex(rel-i.rel,img-i.img);
}

Complex Complex::operator * (Complex &i)
{
  return Complex((rel*i.rel-img*i.img),(rel*i.img+img*i.rel));
}

Complex Complex::operator / (Complex &i)
{
  double a=rel;
  double b=img;
  double c=i.rel;
  double d=i.img;
  return Complex((a*c+b*d)/(c*c-d*d),(b*c-a*d)/(c*c-d*d));
}

ostream& operator <<(ostream &output,const Complex &c)
{
  output<<"("<<c.rel<<"+"<<c.img<<"i)";
  return output;
}

int main(int argc, char const *argv[])
{
  Complex A(1,1);
  Complex B(2,3);
  cout<<A<<"+"<<B<<"="<<(A+B)<<endl;
  cout<<A<<"-"<<B<<"="<<(A-B)<<endl;
  cout<<A<<"*"<<B<<"="<<(A*B)<<endl;
  cout<<A<<"/"<<B<<"="<<(A/B)<<endl;
  return 0;
}

第三题

#include "iostream"

using std::cin;
using std::cout;
using std::endl;
using std::ostream;
using std::istream;

class Complex
{
private:
  double rel;
  double img;
public:
  Complex(double=0.0,double=0.0);
  Complex operator + (Complex &i);
  Complex operator + (double i);
  friend Complex operator + (double i,const Complex &c);
  friend ostream& operator <<(ostream &output,const Complex &c);
};

Complex::Complex(double x,double y)
:rel(x),img(y)
{

}

Complex Complex::operator + (Complex &i)
{
  return Complex(rel+i.rel,img+i.img);
}

Complex Complex::operator + (double i)
{
  return Complex(rel+i,img);
}

Complex operator + (double i,const Complex &c)
{
  return Complex(c.rel+i,c.img);
}

ostream& operator <<(ostream &output,const Complex &c)
{
  output<<"("<<c.rel<<"+"<<c.img<<"i)";
  return output;
}

int main(int argc, char const *argv[])
{
  Complex A(1,1);
  Complex B(2,3);
  double i=1.2;
  cout<<A<<"+"<<B<<"="<<(A+B)<<endl;
  cout<<A<<"+"<<i<<"="<<(A+i)<<endl;
  cout<<i<<"+"<<A<<"="<<(i+A)<<endl;
  return 0;
}

第四题

第五题

#include "iostream"

using std::cin;
using std::cout;
using std::endl;
using std::ostream;
using std::istream;



class Matrix
{
private:
  int a[2][3];
public:
  Matrix operator + (const Matrix &m);
  friend ostream& operator << (ostream &output,const Matrix &m);
  friend istream& operator >> (istream &input,Matrix &m);
};


Matrix Matrix::operator + (const Matrix &m)
{
  Matrix m1;
  for(int i=0;i<2;i++)
  {
    for(int j=0;j<3;j++)
    {
      m1.a[i][j]=a[i][j]+m.a[i][j];
    }
  }
  return m1;
}

ostream& operator << (ostream &output,const Matrix &m)
{
  for(int i=0;i<2;i++)
  {
    for(int j=0;j<3;j++)
    {
      output<<m.a[i][j]<<" ";
    }
    output<<endl;
  }
  return output;
}

istream& operator >> (istream &input,Matrix &m)
{
  for(int i=0;i<2;i++)
  {
    for(int j=0;j<3;j++)
    {
      input>>m.a[i][j];
    }
  }
  return input;
}

int main(int argc, char const *argv[])
{
  Matrix A;
  Matrix B;
  cin>>A;
  cin>>B;
  cout<<"A+B="<<endl;
  cout<<(A+B)<<endl;
  return 0;
}

第六题

#include "iostream"

using std::cin;
using std::cout;
using std::endl;
using std::ostream;
using std::istream;

class Complex
{
private:
  double rel;
  double img;

public:
  Complex(double=0.0,double=0.0);
  friend Complex operator + (const Complex &c,const double i);
  operator double();
  friend ostream& operator << (ostream &output,const Complex &c);
};

Complex::Complex(double x,double y)
:rel(x),img(y){}

Complex operator + (const Complex &c,const double i)
{
  return Complex(c.rel+i,c.img);
}

Complex::operator double()
{
  return rel;
}

ostream& operator << (ostream &output,const Complex &c)
{
  output<<"("<<c.rel<<"+"<<c.img<<"i"<<")";
  return output;
}

int main(int argc, char const *argv[])
{
  Complex A(1.1,2.1);
  cout<<"A="<<A<<endl;
  cout<<"A+3.1="<<(A+3.1)<<endl;
  cout<<"(double)(A+3.1)="<<(double)(A+3.1)<<endl;
  return 0;
}

第七题

#include "iostream"
#include "string"

using std::cin;
using std::cout;
using std::endl;
using std::string;

class Student
{
private:
  string name;
  int    age;
  string sex;

public:
  Student();
  Student(string,int,string);
  string Get_Name() const;
  int    Get_age() const;
  string Get_sex() const;
};

Student::Student()
{}

Student::Student(string na,int ag,string se)
:name(na),age(ag),sex(se)
{}

string Student::Get_Name() const
{
  return name;
}

int Student::Get_age() const
{
  return age;
}

string Student::Get_sex() const
{
  return sex;
}

class Teacher
{
private:
  string name;
  int    age;
  string sex;

public:
  Teacher();
  Teacher(const Student&);
  Teacher(string,int,string);
  string Get_Name() const;
  int    Get_age() const;
  string Get_sex() const;
};

Teacher::Teacher()
{}

Teacher::Teacher(const Student &S)
:name(S.Get_Name()),age(S.Get_age()),sex(S.Get_sex())
{}

Teacher::Teacher(string na,int ag,string se)
:name(na),age(ag),sex(se)
{}

string Teacher::Get_Name() const
{
  return name;
}

int Teacher::Get_age() const
{
  return age;
}

string Teacher::Get_sex() const
{
  return sex;
}

int main(int argc, char const *argv[])
{
  Student s1("nihao",18,"M");
  cout<<"student:"<<endl;
  cout<<s1.Get_Name()<<endl;
  cout<<s1.Get_age()<<endl;
  cout<<s1.Get_sex()<<endl;

  Teacher t1(s1);
  cout<<"teacher:"<<endl;
  cout<<t1.Get_Name()<<endl;
  cout<<t1.Get_age()<<endl;
  cout<<t1.Get_sex()<<endl;
  return 0;
}