1/*
2 Copyright(C) 1998
3 All Rights Reserved. Salih Yurttas, ZCubes, BitsOfCode Software Systems, Inc..
4
5 Permission to use, copy, modify, and distribute this
6 software and its documentation for EDUCATIONAL purposes
7 and without fee is hereby granted provided that this
8 copyright notice appears in all copies.
9
10 date : January 1, 1998.
11 author : Salih Yurttas.
12
13 S.cpp
14*/
15
16
17#include <cstring>
18
19using namespace std;
20
21#include "S.h"
22
23S::
24S(const char *a) {
25 if(a) {
26 l = strlen(a);
27 s = new char[l+1];
28 strcpy(s,a);
29 }
30 else {
31 l = 0;
32 s = new char[l+1];
33 *s = '\0';
34 }
35}
36
37S::
38S(const S& a) {
39 if(a.s) {
40 l = strlen(a.s);
41 s = new char[l+1];
42 strcpy(s,a.s);
43 }
44 else {
45 l = 0;
46 s = new char[l+1];
47 *s = '\0';
48 }
49}
50
51S::
52~S() {
53 delete [] s;
54}
55
56S&
57S::
58operator=(const S& a) {
59 if(this==&a) return *this;
60
61 delete [] s;
62
63 l = strlen(a.s);
64 s = new char[l+1];
65
66 strcpy(s,
67 a.s);
68
69 return *this;
70}
71
72S&
73S::
74operator=(const char* a) {
75 if(*this==a) return *this;
76
77 delete [] s;
78
79 l = strlen(a);
80 s = new char[l+1];
81
82 strcpy(s,
83 a);
84
85 return *this;
86}
87
88S
89operator+(const S& a,
90 const S& b) {
91 int n = a.l + b.l;
92 char *t = new char[n+1];
93
94 strcpy(t,
95 a.s);
96
97 strcat(t,
98 b.s);
99
100 return S(t);
101}
102
103bool
104operator==(const S& a,
105 const S& b) {
106 return (strcmp(a.s, b.s)==0);
107}
108
109ostream&
110operator<<(ostream& os,
111 const S& a) {
112 os << a.s << endl;
113
114 return os;
115}