字符串的代码错误好奇怪啊，哪位大神指点一下，如果把第11行改成int sz = 128就没问题

Question

1. # #ifndef ASTRING
2. # #define ASTRING
3. # #include
4. # #include
5. # using namespace std;
6. # #define defaultSize = 128
7. #
8. # class AString
9. # {
10. # public:
11. # AString(int sz = defaultSize );
12. # AString(const char *init);
13. # AString(const AString& ob);
14. # AString operator() (int pos, int len);
15. # int operator == (AString& ob)const { int temp; temp = strcmp(ch,ob.ch)==0; return temp;}
16. # int operator != (AString& ob)const {return strcmp(ch,ob.ch) != 0;}
17. # int operator !()const {return curLength == 0;}
18. # AString& operator = (AString& ob);
19. # char& operator ;
20. # int Find(AString& pat, int k)const;
21. # void getNext(int next[]);
22. # int fastFind(AString& pat, int k, int next[])const;
23. # bool judge(char *str);
24. # void replace(AString& s, AString& t, AString& v);
25. # void frequency(AString& s);
26. # private:
27. # char *ch;
28. # int curLength;
29. # int maxSize;
30. # };
31. #
32. # AString::AString(int sz)
33. # {
34. # maxSize = sz;
35. # ch = new char[maxSize+1];
36. # if (ch == NULL)
37. # {cout<<"error"<<endl; exit(1);}
38. #
39. # curLength = 0; ch[0] = '\0';
40. # };
41. #
42. # AString::AString(const char *init)
43. # {
44. # int len = strlen(init);
45. # maxSize = (len>128)? len: 128;
46. # ch = new char[maxSize+1];
47. # if(ch == NULL)
48. # {cout<<"error"<<endl; exit(1);}
49. # curLength = len;
50. # strcpy(ch,init);
51. # };
52. #
53. # AString::AString(const AString& ob)
54. # {
55. # maxSize = ob.maxSize;
56. # ch = new char(maxSize+1);
57. # if(ch == NULL){cout<<"error"<<endl; exit(1);}
58. # curLength = ob.curLength;
59. # strcpy(ch, ob.ch);
60. # };
61. #
62. # AString AString::operator()(int pos, int len)
63. # {
64. # AString temp;
65. # if (pos= maxSize || len < 0)
66. # { temp.curLength = 0; temp.ch[0] = '\0';}
67. # else
68. # { if (pos+len-1 >= curLength) len = curLength - pos;
69. # temp.curLength = len;
70. # for (int i=0,j=pos; i<len; i++,j++) temp.ch[i] = ch[j];
71. # temp.ch[len] = '\0';
72. # }
73. # return temp;
74. # }
75. #
76. # char& AString::operator
77. # {
78. # if (i=curLength) {cout<<"error"<<endl; exit(1);}
79. # return ch[i];
80. # }
81. #
82. # int AString::Find(AString& pat, int k)const
83. # {
84. # int i, j;
85. # for(i=k; i<=curLength - pat.curLength; i++)
86. # {
    
87. # for(j=0; j<pat.curLength; j++)
88. # if(ch[i+j] != pat.ch[j])
89. # break;
90. #
    
91. # if(j == pat.curLength)
92. # return i;
93. # }
94. # return -1;
95. # };
96. #
97. # void AString::getNext(int next[])
98. # {
99. # int j = 0, k = -1, lengthP = curLength;
100. # next[0] = -1;
101. # while (j<lengthP)
102. # if (k == -1 || ch[j] == ch[k])
103. # {
104. # j++; k++;
105. # next[j] = k;
106. # }
107. # else k = next[k];
108. # }
109. #
110. # int AString::fastFind(AString& pat, int k, int next[])const
111. # {
112. # int posP = 0, posT = k;
113. # int lengthP = pat.curLength;
114. # int lengthT = curLength;
115. # while (posP < lengthP && posT < lengthT)
116. # if (posP == -1 || pat.ch[posP] == ch[posT])
117. # { posP++;
118. # posT++;
119. # }
120. # else posP = next[posP];
121. # if (posP < lengthP) return -1;
122. # else return posT-lengthP;
123. # };
124. # bool AString::judge(char *str) //如果是回文字,则返回true,否则为false
125. # {
126. # int length,i;
     
127. # char *tmp;
128. # char a;
129. # stack s;
130. # length = strlen(str);
131. # tmp = new char(length);
132. # for(i = 0; i < length; i++)
133. # s.push(str[i]);
134. # for(i = 0; i < length; i++)
135. # { a=s.top();
136. # tmp[i] = a;
137. # s.pop();
138. # }
139. # tmp[i] = '\0';
140. # if (strcmp(str, tmp) == 0)
141. # return true;
142. # return false;
143. # };
144. # void AString::replace(AString &s, AString &t, AString &v)
145. # {
146. # int lens = s.curLength, lent = t.curLength, lenv = v.curLength;
147. # int *next = new int(10);
148. # int value;
149. # t.getNext(next);
150. # int post = 0, postp;
151. # value = s.fastFind(t, 0, next);
152. # while( value != -1)
153. # {
154. # char *tmp = new char[100];
155. # strcpy(tmp, s.ch+value+lent);
156. # strcpy(s.ch+value, v.ch);
157. # strcat(s.ch,tmp);
158. # s.curLength = strlen(s.ch);
159. # value = s.fastFind(t, value + lenv,next);
160. # }
161. # }
162. # void AString::frequency(AString& s)
163. # {
164. # int i = 0, j , k;
165. # int a,b,c,d;
166. # a = b = c = d = 0;
167. # for(i = 0; i < s.curLength; i++)
168. # {
169. # switch(s.ch[i])
170. # {
     
171. # case 'a': a++; break;
172. # case 'b': b++; break;
173. # case 'c': c++; break;
174. # case 'd': d++; break;
175. # }
176. # }
177. # }
178. # #endif
179. # #include "string.h"
180. #
181. # int main()
182. # {
183. # AString str1;
184. # return 0;
185. #
186. # }

Answer 1

#define defaultSize = 128 改为 const defaultSize = 128