第九周C++实验报告（一）

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1. #include<iostream.h>      
2. class Complex      
3. {  
4. public:      
5.     Complex(){real=0;imag=0;}      
6.     Complex(double r,double i){real=r;imag=i;}      
7.     Complex operator+(Complex &c2);      
8.     Complex operator-(Complex &c2);      
9.     Complex operator*(Complex &c2);      
10.     Complex operator/(Complex &c2);      
11.     friend ostream& operator << (ostream&,Complex&);    
12.     friend istream& operator >> (istream&,Complex&);    
13. private:      
14.     double real;      
15.     double imag;      
16. };      
17. //下面定义成员函数      
18. istream& operator >> (istream& input,Complex& c)    
19. {     
20.     input>>c.real>>c.imag;    
21.     return input;    
22. }  
23.     
24. ostream &operator << (ostream &output,Complex &c)    
25. {    
26.     output<<"("<<c.real<<" "<<c.imag<<"i)"<<endl;    
27.     return output;    
28. }    
29. //复数相加： (a+bi)+(c+di)=(a+c)+(b+d)i.      
30. Complex Complex::operator+(Complex &c2)          
31. {        
32.     Complex c;         
33.     c.real=real+c2.real;        
34.     c.imag=imag+c2.imag;        
35.     return c;        
36. }        
37. //复数相减：(a+bi)-(c+di)=(a-c)+(b-d)i.            
38. Complex Complex::operator-(Complex &c2)            
39. {            
40.     Complex c;            
41.     c.real=real-c2.real;            
42.     c.imag=imag-c2.imag;            
43.     return c;            
44. }            
45. //复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i.        
46. Complex Complex::operator*(Complex &c2)       
47. {            
48.     Complex  c;            
49.     c.real=real*c2.real-imag*c2.imag;            
50.     c.imag=imag*c2.real+real*c2.imag;            
51.     return c;            
52. }            
53. //复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)i        
54. Complex Complex::operator/(Complex &c2)       
55. {            
56.     Complex  c;            
57.     double d=c2.real*c2.real+c2.imag*c2.imag;        
58.     c.real=(real*c2.real+imag*c2.imag)/d;             
59.     c.imag=(imag*c2.real-real*c2.imag)/d;            
60.     return c;            
61. }         
62.     
63. int main()      
64. {      
65.     Complex c1,c2,c3;     
66.     cout<<"请输入复数c1的值:（以a b的形式输入）";    
67.     cin>>c1;    
68.     cout<<"请输入复数c2的值:（以a b的形式输入）";    
69.     cin>>c2;    
70.     cout<<"c1=";      
71.     cout<<c1;      
72.     cout<<"c2=";      
73.     cout<<c2;      
74.     c3=c1+c2;      
75.     cout<<"c1+c2=";      
76.     cout<<c3;      
77.     c3=c1-c2;      
78.     cout<<"c1-c2=";      
79.     cout<<c3;      
80.     c3=c1*c2;      
81.     cout<<"c1*c2=";      
82.     cout<<c3;      
83.     c3=c1/c2;      
84.     cout<<"c1/c2=";      
85.     cout<<c3;       
86.     return 0;      
87. } 
88.