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
|
/*
* MONA
* Copyright (C) 1997-2004 BRICS.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifndef __STRING_H
#define __STRING_H
#include <iostream>
#include <string.h>
#include <stdio.h>
class String {
struct srep {
char *s;
int n;
srep() {n=1;}
};
srep *p;
public:
String(const char *s)
{
p = new srep;
p->s = new char[strlen(s)+1];
strcpy(p->s, s);
}
String(const String &s)
{
s.p->n++;
p = s.p;
}
String(const int i)
{
p = new srep;
p->s = new char[12];
sprintf(p->s, "%d", i);
}
friend String &operator+(const String &s1, const String &s2)
{
char t[1000];
strcpy(t, s1.p->s);
strcat(t, s2.p->s);
return *(new String(t));
}
friend std::ostream &operator<<(std::ostream &o, const String &s)
{
return o << s.p->s;
}
~String()
{
if (--p->n == 0) {
delete[] p->s;
delete p;
}
}
};
#endif
|
