[求助]如何重载运算符?

香叶aiq格格

重载运算符">","<","<<"和">>",可以比较两个复数,以及输入和输出复数.
请问这个程序如何编?谢谢了?

ヤforget♀戀

1. Rational operator+ (const Rational &r1,const Rational &r2){
   
2. return r1.Add(r2);
   
3. }
   
4. Rational operator- (const Rational &r1,const Rational &r2){
   
5. return r1.Subtract(r2);
   
6. }
   
7. Rational operator* (const Rational &r1,const Rational &r2){
   
8. return r1.Multiply(r2);
   
9. }
   
10. Rational operator/ (const Rational &r1,const Rational &r2){
    
11. return r1.Divide(r2);
    
12. }
    
13. //stream operators
    
14. ostream& operator<< (ostream &sout,const Rational &r){
    
15. r.Insert(sout);
    
16. return sout;
    
17. }
    
18. istream& operator>> (istream &sin ,Rational &r){
    
19. r.Extract(sin);
    
20. return sin;
    
21. }
    
22. //bool operator
    
23. bool operator== (const Rational &r1,const Rational &r2){
    
24. return r1.Equal(r2);
    
25. }
    
26. bool operator< (const Rational &r1,const Rational &r2){
    
27. return r1.LessThan(r2);
    
28. }
    
29. bool operator<= (const Rational &r1,const Rational &r2){
    
30. if (r1.LessThan(r2) || r1.Equal(r2))
    
31. return true;
    
32. else
    
33. return false;
    
34. }
    
35. bool operator> (const Rational &r1,const Rational &r2){
    
36. if (!r1.LessThan(r2))
    
37. return true;
    
38. else
    
39. return false;
    
40. }
    
41. bool operator>= (const Rational &r1,const Rational &r2){
    
42. if (!r1.LessThan(r2) || r1.Equal(r2))
    
43. return true;
    
44. else
    
45. return false;
    
46. }

复制代码

这是分数的一些重载，你看看吧，道理一样的！

風雲々無心メ

谢谢你了！