内存引用无效的问题

智能

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. typedef struct node
   
4. { int coef, exp;
   
5. struct node *next;
   
6. } NODE;
   
7. 
   
8. void multiplication( NODE *, NODE * , NODE * );
   
9. void input( NODE * );
   
10. void output( NODE * );
    
11. void multiplication(NODE*a,NODE*b,NODE*c)
    
12. {
    
13. NODE *a0=a;
    
14. NODE *b0=b;
    
15. NODE *c0=c;
    
16. NODE *c1=NULL;
    
17. NODE *lin=NULL;
    
18. NODE *zhong=NULL;
    
19. int ji,p=8,k;
    
20. while(b0->next!=NULL)
    
21. {
    
22. b0=b0->next;
    
23. a0=a;
    
24. while(a0->next!=NULL)
    
25. {
    
26. a0=a0->next;
    
27. ji=a0->coef*b0->coef;
    
28. k=a0->exp+b0->exp;
    
29. c0=c;
    
30. while(c0->next!=NULL)
    
31. {
    
32. p=0;
    
33. lin=c0;//临时存储c0
    
34. c0=c0->next;
    
35. if(c0->exp>=k)
    
36. {p=1;break;}
    
37. }
    
38. if(c0->next==NULL&&p!=1)
    
39. {
    
40. if(c0->exp!=k)
    
41. {
    
42. zhong=(NODE*)malloc(sizeof(NODE));
    
43. c0->next=zhong;
    
44. zhong->next=NULL;
    
45. zhong->coef=ji;
    
46. zhong->exp=k;
    
47. }
    
48. else
    
49. c0->coef=c0->coef+ji;
    
50. }
    
51. if(c0->exp==k)
    
52. {
    
53. c0->coef=c0->coef+ji;
    
54. }
    
55. if(c0->exp>k)
    
56. {
    
57. c1=(NODE*)malloc(sizeof(NODE));//新申请c1
    
58. lin->next=c1;
    
59. c1->next=c0;
    
60. c1->exp=k;
    
61. c1->coef=ji;
    
62. }
    
63. }
    
64. }
    
65. }
    
66. 
    
67. 
    
68. 
    
69. void input( NODE * head )
    
70. { int flag, sign, sum, x;
    
71. char c;
    
72. 
    
73. NODE * p = head;
    
74. 
    
75. while ( (c=getchar()) !='\n' )
    
76. {
    
77. if ( c == '<' )
    
78. { sum = 0;
    
79. sign = 1;
    
80. flag = 1;
    
81. }
    
82. else if ( c =='-' )
    
83. sign = -1;
    
84. else if( c >='0'&& c <='9' )
    
85. { sum = sum*10 + c - '0';
    
86. }
    
87. else if ( c == ',' )
    
88. { if ( flag == 1 )
    
89. { x = sign * sum;
    
90. sum = 0;
    
91. flag = 2;
    
92. sign = 1;
    
93. }
    
94. }
    
95. else if ( c == '>' )
    
96. { p->next = ( NODE * ) malloc( sizeof(NODE) );
    
97. p->next->coef = x;
    
98. p->next->exp = sign * sum;
    
99. p = p->next;
    
100. p->next = NULL;
     
101. flag = 0;
     
102. }
     
103. }
     
104. }
     
105. 
     
106. void output( NODE * head )
     
107. {
     
108. while ( head->next != NULL )
     
109. { head = head->next;
     
110. printf("<%d,%d>,", head->coef, head->exp );
     
111. }
     
112. printf("\n");
     
113. }
     
114. int main()
     
115. { NODE * head1, * head2, * head3;
     
116. 
     
117. head1 = ( NODE * ) malloc( sizeof(NODE) );
     
118. input( head1 );
     
119. 
     
120. head2 = ( NODE * ) malloc( sizeof(NODE) );
     
121. input( head2 );
     
122. 
     
123. head3 = ( NODE * ) malloc( sizeof(NODE) );
     
124. head3->next = NULL;
     
125. multiplication( head1, head2, head3 );
     
126. 
     
127. output( head3 );
     
128. system("pause");
     
129. 
     
130. return 0;
     
131. }

复制代码

用dev和vs都可以编译并输出正确结果，但用gcc会提示“无效内存引用。”其中multiplication函数是自己编的，其它是预制代码

智能

没人来吗。。。。。

智能

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