关于重载操作符！编译不通过？

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1. #include<iostream>
   
2. #include<stdlib.h>
   
3. class Rational
   
4. {
   
5. public:
   
6. Rational(int num, int denom);
   
7. Rational operator+(Rational rhs);
   
8. Rational operator-(Rational rhs);
   
9. Rational operator*(Rational rhs);
   
10. Rational operator/(Rational rhs);
    
11. 
    
12. private:
    
13. void normalize();
    
14. int num;
    
15. int denom;
    
16. 
    
17. friend std::ostream& operator<<(std::ostream os,Rational f);
    
18. };
    
19. 
    
20. Rational::Rational(int num,int denom)
    
21. {
    
22. this->num=num;
    
23. this->denom=denom;
    
24. normalize();
    
25. }
    
26. 
    
27. void Rational::normalize()
    
28. {
    
29. if(denom<0)
    
30. {
    
31. num=-num;
    
32. denom=-denom;
    
33. }
    
34. //欧几里得算法求最大公约数
    
35. int a=abs(num);
    
36. int b=abs(denom);
    
37. while(b>0)
    
38. {
    
39. int t=a%b;
    
40. a=b;
    
41. b=t;
    
42. }
    
43. num=num/a;
    
44. denom=num/a;
    
45. }
    
46. 
    
47. Rational Rational::operator+(Rational rhs)
    
48. {
    
49. int a=num;
    
50. int b=denom;
    
51. int c=rhs.num;
    
52. int d=rhs.denom;
    
53. int e=a*b+c*d;
    
54. int f=b*d;
    
55. return Rational(e,f);
    
56. }
    
57. 
    
58. Rational Rational::operator-(Rational rhs)
    
59. {
    
60. rhs.num=-rhs.num;
    
61. return operator+(rhs);
    
62. }
    
63. 
    
64. Rational Rational::operator*(Rational rhs)
    
65. {
    
66. int a=num;
    
67. int b=denom;
    
68. int c=rhs.num;
    
69. int d=rhs.denom;
    
70. int e=a*b;
    
71. int f=c*d;
    
72. return Rational(e,f);
    
73. }
    
74. 
    
75. Rational Rational::operator/(Rational rhs)
    
76. {
    
77. int t=rhs.num;
    
78. rhs.num=rhs.denom;
    
79. rhs.denom=t;
    
80. return operator*(rhs);
    
81. }
    
82. 
    
83. 
    
84. std::ostream& operator<<(std::ostream os,Rational f);
    
85. 
    
86. int main()
    
87. {
    
88. Rational f1(2,16);
    
89. Rational f2(7,8);
    
90. std::cout<<"="<<(f1+f2)<<std::endl;
    
91. std::cout<<"="<<(f1-f2)<<std::endl;
    
92. std::cout<<"="<<(f1*f2)<<std::endl;
    
93. std::cout<<"="<<(f1/f2)<<std::endl;
    
94. return (0);
    
95. }
    
96. 
    
97. std::ostream& operator<<(std::ostream os,Rational f)
    
98. {
    
99. os<<f.num<<"/"<<f.denom;
    
100. return os;
     
101. }
     

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哪位大神看看问题出哪儿了？先谢过

pcfate

顶一顶！！！！！！！！！

pcfate

来大神帮忙看下吧~~