第四章

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01.1.#include <iostream>  02.using namespace std;  03.class Complex{  04.public:  05.    Complex()  06.    {  07.     real=0;  08.     imag=0;  09.    }  10.    Complex(double r,double i)  11.    {  12.     real=r;  13.     imag=i;  14.    }  15.    double getreal()  16.    {  17.     return real;  18.    }  19.    double getimag()  20.    {  21.     return imag;  22.    }  23.    void display()  24.    {  25.     cout<<"("<<real<<"+"<<imag<<"i)"<<endl;  26.    }  27.private:  28.    double real;  29.    double imag;  30.};  31.Complex operator +(Complex &c1,Complex &c2)  32.{  33. return Complex(c1.getreal()+c2.getreal(),c1.getimag()+c2.getimag());  34.}  35.int main()  36.{  37. Complex c1(1,2),c2(3,4),c3;  38. c3=c1+c2;  39. cout<<"c3=";  40. c3.display();  41. return 0;  42.}  <img src="http://img.blog.csdn.net/20150517164954206" alt="" />01.2. #include <iostream>  02.using namespace std;  03.class Complex{  04.public:  05.    Complex()  06.    {  07.     real=0;  08.     imag=0;  09.    }  10.    Complex(double r,double i)  11.    {  12.     real=r;  13.     imag=i;  14.    }  15.    Complex operator +(Complex &);  16.    Complex operator -(Complex &);  17.    Complex operator *(Complex &);  18.    Complex operator /(Complex &);  19.    void display()  20.    {  21.     cout<<"("<<real<<"+"<<imag<<"i)"<<endl;  22.    }  23.private:  24.    double real;  25.    double imag;  26.};  27.Complex Complex::operator +(Complex &c2)  28.{  29. return Complex(real+c2.real,imag+c2.imag);  30.}  31.Complex Complex::operator -(Complex &c2)  32.{  33. return Complex(real-c2.real,imag-c2.imag);  34.}  35.Complex Complex::operator *(Complex &c2)  36.{  37. return Complex(real*c2.real,imag*c2.imag);  38.}  39.Complex Complex::operator /(Complex &c2)  40.{  41. return Complex(real/c2.real,imag/c2.imag);  42.}  43.int main()  44.{  45. Complex c1(2,4),c2(1,2),c3,c4,c5,c6;  46. c3=c1+c2;  47. cout<<"c3=c1+c2=";  48. c3.display();  49. c4=c1-c2;  50. cout<<"c4=c1-c2=";  51. c4.display();  52. c5=c1*c2;  53. cout<<"c5=c1*c2=";  54. c5.display();  55. c6=c1/c2;  56. cout<<"c6=c1/c2=";  57. c6.display();  58. return 0;  59.}  <img src="http://img.blog.csdn.net/20150517164920381" alt="" />01.3.#include <iostream.h>  02.class Complex{  03.public:  04.    Complex()  05.    {  06.     real=0;  07.     imag=0;  08.    }  09.    Complex(double r,double i)  10.    {  11.     real=r;  12.     imag=i;  13.    }  14.    Complex operator +(Complex &);  15.    Complex operator +(int &);  16.    friend Complex operator +(int &,Complex &);  17.    void display()  18.    {  19.     cout<<"("<<real<<"+"<<imag<<"i)"<<endl;  20.    }  21.private:  22.    double real;  23.    double imag;  24.};  25.Complex Complex::operator +(Complex &c2)  26.{  27. return Complex(real+c2.real,imag+c2.imag);  28.}  29.Complex Complex::operator +(int &i)  30.{  31. return Complex(real+i,imag);  32.}  33.Complex operator +(int &i,Complex &c3)  34.{  35. return Complex(i+c3.real,c3.imag);  36.}  37.int main()  38.{  39. int i=2;  40. Complex c1(2,4),c2(1,2),c3,c4,c5;  41. c3=c1+c2;  42. cout<<"c3=c1+c2=";  43. c3.display();  44. c4=c1+i;  45. cout<<"c4=c1+i=";  46. c4.display();  47. c5=i+c2;  48. cout<<"c5=i+c2=";  49. c5.display();  50. return 0;  51.}

<img src="http://img.blog.csdn.net/20150517164928166" alt="" />

 01.4. #include <iostream.h>  02.class Matrix{  03.public:  04.    Matrix();  05.    friend Matrix operator +(Matrix &,Matrix &);  06.    void input();  07.    void display();  08.private:  09.    int mat[2][3];  10.};  11.Matrix::Matrix()  12.{  13. for(int i=0;i<2;i++)  14.     for(int j=0;j<3;j++)  15.         mat[i][j]=0;  16.}  17.Matrix operator +(Matrix &a,Matrix &b)  18.{  19. Matrix c;  20. for(int i=0;i<2;i++)  21.     for(int j=0;j<3;j++)  22.         c.mat[i][j]=a.mat[i][j]+b.mat[i][j];  23.     return c;  24.}  25.void Matrix::input()  26.{  27. for(int i=0;i<2;i++)  28.     for(int j=0;j<3;j++)  29.         cin>>mat[i][j];  30.}  31.void Matrix::display()  32.{  33. for(int i=0;i<2;i++)  34.     for(int j=0;j<3;j++)  35.     {cout<<mat[i][j]<<" ";  36.     cout<<endl;}  37.}  38.int main()  39.{  40. Matrix a,b,c;  41. a.input();  42. b.input();  43. c=a+b;  44. c.display();  45. return 0;  46.}  <img src="http://img.blog.csdn.net/20150517164935888" alt="" />01.5. #include <iostream.h>  02.class Matrix{  03.public:   04.    Matrix();  05.    friend Matrix operator +(Matrix &,Matrix &);  06.    friend istream& operator >>(istream &,Matrix &);  07.    friend ostream& operator <<(ostream &,Matrix &);  08.private:  09.    int mat[2][3];  10.};  11.Matrix::Matrix()  12.{  13. for(int i=0;i<2;i++)  14.     for(int j=0;j<3;j++)  15.         mat[i][j]=0;  16.}  17.Matrix operator +(Matrix &a,Matrix &b)  18.{  19. Matrix c;  20. for(int i=0;i<2;i++)  21.     for(int j=0;j<3;j++)  22.         c.mat[i][j]=a.mat[i][j]+b.mat[i][j];  23.     return c;  24.}  25.istream & operator >>(istream & in,Matrix &c)  26.{  27. for(int i=0;i<2;i++)  28.     for(int j=0;j<3;j++)  29.         in>>c.mat[i][j];  30.     return in;  31.}  32.ostream & operator <<(ostream & out,Matrix &c)  33.{  34. for(int i=0;i<2;i++)  35.     for(int j=0;j<3;j++)  36.     {  37.     out<<c.mat[i][j]<<" ";  38.     cout<<endl;  39.     }  40.     return out;  41.}  42.int main()  43.{  44. Matrix a,b,c;  45. cin>>a;  46. cout<<a;  47. cin>>b;  48. cout<<b;  49. c=a+b;  50. cout<<c;  51. return 0;  52.}

<img src="http://img.blog.csdn.net/20150517165026763" alt="" />

01.6. #include <iostream>  02.using namespace std;  03.class Complex{  04.public:   05.    Complex()  06.    {  07.     real=0;  08.     imag=0;  09.    }  10.    Complex(double r)  11.    {  12.     real=r;  13.     imag=0;  14.    }  15.    Complex(double r,double i)  16.    {  17.     real=r;  18.     imag=i;  19.    }  20.    operator double()  21.    {  22.     return real;  23.    }  24.    void display()  25.    {  26.     cout<<"("<<real<<"+"<<imag<<"i)"<<endl;  27.    }  28.private:  29.    double real;  30.    double imag;  31.};  32.int main()  33.{  34. int i=2;  35. Complex c1(2,4),c2;  36. double d1;  37. d1=2.5+c1;  38. cout<<"d1="<<d1<<endl;  39. c2=Complex(d1);  40. cout<<"c2="<<c2.display<<endl;  41. return 0;  42.}  <img src="http://img.blog.csdn.net/20150517164948430" alt="" />01.7. #include <iostream>  02.using namespace std;  03.#include <cstring>  04.class Student{  05.public:  06.    Student(int,char[],char,float);  07.    int get_num()  08.    {  09.     return num;  10.    }  11.    char * get_name()  12.    {  13.     return name;  14.    }  15.    char get_sex()  16.    {  17.     return sex;  18.    }  19.    void display()  20.    {  21.     cout<<"num="<<num<<endl;  22.     cout<<"name="<<name<<endl;  23.     cout<<"sex="<<sex<<endl;  24.     cout<<"score="<<score<<endl;  25.    }  26.private:  27.    int num;  28.    char name[20];  29.    char sex;  30.    float score;  31.};  32.Student::Student(int n,char nam[],char s,float so)  33.{  34. num=n;  35. strcpy(name,nam);  36. sex=s;  37. score=so;  38.}  39.class Teacher{  40.public:  41.    Teacher(){}  42.    Teacher(Student &stud)  43.    {  44.      num=stud.get_num();  45.      strcpy(name,stud.get_name());  46.      sex=stud.get_sex();  47.      pay=3000;  48.    }  49.    Teacher(int n,char nam[],char s,float p)  50.    {  51.       num=n;  52.       strcpy(name,nam);  53.       sex=s;  54.       pay=p;  55.    }  56.    void display()  57.    {  58.     cout<<"num="<<num<<endl;  59.     cout<<"name="<<name<<endl;  60.     cout<<"sex="<<sex<<endl;  61.     cout<<"pay="<<pay<<endl;  62.    }  63.private:  64.    int num;  65.    char name[20];  66.    char sex;  67.    float pay;  68.};  69.//Teacher::Teacher(int n,char nam[],char s,float p){ num=n; strcpy(name,nam); sex=s; pay=p;}  70.//Teacher::Teacher(Student &stud){num=stud.get_num();strcpy(name,stud.get_name());sex=stud.get_sex();pay=3000;}  71.int main()  72.{  73.    Teacher t1;  74.    Student s1(1,"xian",'F',100);  75.    cout<<"s1:"<<endl;  76.    s1.display();  77.    t1=Teacher(s1);  78.    cout<<"t1:"<<endl;  79.    t1.display();  80.    return 0;  81.}

<img src="http://img.blog.csdn.net/20150517165040273" alt="" />

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