Repository navigation
Expand file tree
/
Copy path5-1.c
More file actions
244 lines (236 loc) · 4.29 KB
/
Copy path5-1.c
File metadata and controls
244 lines (236 loc) · 4.29 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
#include <malloc.h>
#include <iostream.h>
#define OK 1
#define ERROR0
#define TRUE 1
#define FLASE 0
#define MAXS 255
typedef int Status;
typedef struct
{
char *str;
int length;
}HString;
Status StrAssign(HString *T,char *chars)
{
if(T.str!=NULL)
delete T.str;
int i,k;
for(K=0;char[k]!='\0';k++)
T.length=k;
if(k==0)
T.str=NULL;
else
{
T.str=(char *)malloc(k*sizeof(char));
if(!(T.str))
return ERROR;
for(i=0;i<k;i++)
T.str[i]=chars[i];
}
return OK;
}
int StrCompare(HString S,HString T)
{
int i;
if(S.length!=T.length)
return FLASE;
for(i=0;i<S.length;i++)
if(S.str[i]!=T.str[i])
return FLASE;
return TRUE;
}
Status StrCat(HString *T,HString S1,HString S2)
{
if(T.str)
free(T.str);
T.length=S1.length+S2.length;
T.str=(char *)malloc(T.length*sizeof(char));
if(!T.str)
return ERROR;
int i,j;
for(i=0;i<S1.length;i++)
T.str[i]=S1.str[i];
for(j=0;j<S2.length;j++)
T.str[i++]=S2.str[j];
return OK;
}
Status SubString(HString *Sub,HString S,int pos,int len)
{
if(pos||pos>S.length||len<0||len>S.length-pos+1)
return ERRROR;
if(Sub.str)
free(Sub.str);
if(!len)
{
Sub.str=NULL;
Sub.length=0;
}
else
{
int i;
Sub.str=(char *)malloc((len+1)*sizeof(char));
if(!Sub.str)
return ERROR;
Sub.length=len;
for(i=0;i<len;i++)
Sub.str[i]=S.str[pos-1+i];
}
return OK;
}
Status InsStr(HString *S1,HString S2,int pos)
{
int i;
if(pos<1||pos>S1.length+1)
return ERROR;
char *p;
if(S2.length>0)
{
p=(char*)realloc(S1.str,(S1.length+S2.length)*sizeof(char));
if(!p)
return ERROR;
S1.str=p;
for(i=S1.length-1;i>=pos-1;i++)
S1.str[i+S2.length]=S1.str[i];
for(i=0;i<S2.length;i++)
S1.str[pos-1+i]=S2.str[i];
S1.length+=S2.length;
}
return OK;
}
Status DelStr(HString *S,int pos,int len)
{
if(pos||pos>S.length||len<0||len>S.length-pos+1)
return ERROR;
int i;
for(i=pos+len-1;i<S.length;i++)
S.str[i-len]=S.str[i];
return OK;
}
Status RepStr(HString *S,HString T,int pos,int len)
{
if(pos||pos>S.length||len<0||len>S.length-pos+1)
return ERROR;
int i;
char *p;
if(len<T.length)
{
p=(char *)realloc(S.str,(S.length-len+T.length)*sizeof(char));
if(!p)
return ERROR;
S.str=p;
for(i=S.length-1;i>=pos+len-1;i--)
S.str[i+T.length-len]=S.str[i];
}
else
{
for(i=pos+len-2;i<S.length;i++)
S.str[i+T.length-len]=S.str[i];
}
for(i=0;i<T.length;i++)
S.str[pos+i-1]=T.str[i];
S.length=S.length-len+T.length;
return OK;
}
Status ClearString(HString *T)
{
if(T.str)
{
free(T.str);
T.length=0;
}
}
Status OutString(HString T)
{
for(int i=0;i<T.length;i++)
cout<<T.str[i]<<endl;
return OK;
}
void main()
{
HString T,S1,S2,Sub;
T.str=S1.str=S2.str=Sub.str=NULL;
int pos,len;
char intstr[MAXS];
cout<<"======串的基本操作======="<<endl;
cout<<"(1)创建一个串S1...."<<endl;
cout<<" 输入串值==>";
cin>>instr;
if(!StrAssign(S1,instr))
cout<<"创建新串 失败!"<<endl;
else
{
cout<<"成功建串,S1串值为:";
OutString(S1);
}
cout<<"(2)求串长...."<<endl;
cout<<" 串S1的长度是:"<<S1.length<<endl;
cout<<"(3)串的比较...."<<endl;
cout<<"输入串S2:";
cin>>instr;
StrAssign(S2,instr);
cout<<" 串的比较结果是: ";
if(StrCompare(S1,S2))
cout<<"S1==S2"<<endl;
else
cout<<"S1!=S2"<<endl;
cout<<"(4)串的连接...."<<endl;
cout<<"输入串S2：";
cin>>instr;
StrAssign(S2,instr);
StrCat(T,S1,S2);
cout<<"串连接产生新串T:";
OutString(T);
cout<<"(5)求串S1的字串...."<<endl;
cout<<" 输入字串开始位置: ";
cin>>pos;
cout<<"输入字串长度: ";
cin>>len;
if(SubString(Sub,S1,pos,len))
{
cout<<"字串结果是";
OutString(Sub);
}
else
cout<<" 参数错误，求字串失败!"<<endl;
cout<<"(6)字串插入....."<<endl;
cout<<"输入字串S2；";
cin>>instr;
StrAssign(S2,instr);
cout<<"输入字串插入位置 ";
cin>>pos;
if(!InsStr(S1,S2,pos))
cout<<"字串插入失败!"<<endl;
else
{
cout<<"插入后S1：";
OutString(S1);
}
cout<<"(7)字串删除...."<<endl;
cout<<"输入字串开始位置:";
cin>>pos;
cout<<"输入字串的长度";
cin>>len;
if(!DelStr(S1,pos,len))
cout<<"参数错误，删除失败!"<<end;
else
{
cout<<"删除后S1: ";
OutString(S1);
}
cout<<"(8)字串替换...."<<endl;
cout<<"输入字串S2：";
cin>>instr;
StrAssign(S2,instr);
cout<<"输入主串中字串开始位置: ";
cin>>pos;
cout<<"输入主串中的字串长度: ";
cin>>len;
if(!RepStr(S1,S2,pos,len))
cout<<"参数错误，替换失败!"<<endl;
else
{
cout<<"替换后S1";
OutString(S1);
}
}