-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathall.html
More file actions
238 lines (202 loc) · 6.64 KB
/
all.html
File metadata and controls
238 lines (202 loc) · 6.64 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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<!-- Mirrored from cppreference.com/stdmem/all.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:24:23 GMT -->
<!-- Added by HTTrack --><meta http-equiv="content-type" content="text/html;charset=iso-8859-1"><!-- /Added by HTTrack -->
<head>
<meta name="generator" content=
"HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org">
<title>Standard C Memory</title>
<link href="../cppreference.css" rel="stylesheet" type="text/css">
<link href="../prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="../prettify.js"></script>
</head>
<body onload="prettyPrint()">
<table>
<tr>
<td>
<div class="body-content">
<div class="header-box">
<a href="../index-2.html">cppreference.com</a> > <a href=
"index.html">Standard C Memory</a>
</div>
<div class="name-format">
calloc
</div>
<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <cstdlib>
void* calloc( size_t num, size_t size );
</pre>
<p>The calloc() function returns a pointer to space for an array of
<em>num</em> objects, each of size <em>size</em>. The newly allocated
memory is initialized to zero.</p>
<p>calloc() returns <strong>NULL</strong> if there is an error.</p>
<div class="related-name-format">
Related topics:
</div>
<div class="related-content">
<a href="free.html">free</a><br>
<a href="malloc.html">malloc</a><br>
<a href="realloc.html">realloc</a>
</div>
</div>
</td>
<script src="../../www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
</tr>
</table>
</body>
<!-- Mirrored from cppreference.com/stdmem/all.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:24:23 GMT -->
<!-- Added by HTTrack --><meta http-equiv="content-type" content="text/html;charset=iso-8859-1"><!-- /Added by HTTrack -->
</html>
<hr>
<div class="name-format">
free
</div>
<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <cstdlib>
void free( void* ptr );
</pre>
<p>The free() function deallocates the space pointed to by
<em>ptr</em>, freeing it up for future use. <em>ptr</em> must have
been used in a previous call to <a href="malloc.html">malloc</a>(),
<a href="calloc.html">calloc</a>(), or <a href=
"realloc.html">realloc</a>(). An example:</p>
<pre class="prettyprint">
typedef struct data_type {
int age;
char name[20];
} data;
data *willy;
willy = (data*) malloc( sizeof(*willy) );
...
free( willy );
</pre>
<div class="related-name-format">
Related topics:
</div>
<div class="related-content">
<a href="calloc.html">calloc</a><br>
(C/C++ Keywords) <a href="../keywords/delete.html">delete</a><br>
<a href="malloc.html">malloc</a><br>
(C/C++ Keywords) <a href="../keywords/new.html">new</a><br>
<a href="realloc.html">realloc</a>
</div>
</div>
</td>
<script src="../../www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
</tr>
</table>
</body>
<!-- Mirrored from cppreference.com/stdmem/all.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:24:23 GMT -->
<!-- Added by HTTrack --><meta http-equiv="content-type" content="text/html;charset=iso-8859-1"><!-- /Added by HTTrack -->
</html>
<hr>
<div class="name-format">
malloc
</div>
<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <cstdlib>
void *malloc( size_t size );
</pre>
<p>The function malloc() returns a pointer to a chunk of memory of
size <em>size</em>, or <strong>NULL</strong> if there is an error.
The memory pointed to will be on the heap, not the stack, so make
sure to free it when you are done with it. An example:</p>
<pre class="prettyprint">
typedef struct data_type {
int age;
char name[20];
} data;
data *bob;
bob = (data*) malloc( sizeof(data) );
if( bob != <strong>NULL</strong> ) {
bob->age = 22;
strcpy( bob->name, "Robert" );
printf( "%s is %d years old\n", bob->name, bob->age );
}
free( bob );
</pre>
<div class="related-name-format">
Related topics:
</div>
<div class="related-content">
<a href="calloc.html">calloc</a><br>
(C/C++ Keywords) <a href="../keywords/delete.html">delete</a><br>
<a href="free.html">free</a><br>
(C/C++ Keywords) <a href="../keywords/new.html">new</a><br>
<a href="realloc.html">realloc</a>
</div>
</div>
</td>
<script src="../../www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
</tr>
</table>
</body>
<!-- Mirrored from cppreference.com/stdmem/all.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:24:23 GMT -->
<!-- Added by HTTrack --><meta http-equiv="content-type" content="text/html;charset=iso-8859-1"><!-- /Added by HTTrack -->
</html>
<hr>
<div class="name-format">
realloc
</div>
<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <cstdlib>
void *realloc( void *ptr, size_t size );
</pre>
<p>The realloc() function changes the size of the object pointed to
by ptr to the given size. size can be any size, larger or smaller
than the original. The return value is a pointer to the new space, or
<strong>NULL</strong> if there is an error.</p>
<div class="related-name-format">
Related topics:
</div>
<div class="related-content">
<a href="calloc.html">calloc</a><br>
<a href="free.html">free</a><br>
<a href="malloc.html">malloc</a>
</div>
</div>
</td>
<script src="../../www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
</tr>
</table>
</body>
<!-- Mirrored from cppreference.com/stdmem/all.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:24:23 GMT -->
<!-- Added by HTTrack --><meta http-equiv="content-type" content="text/html;charset=iso-8859-1"><!-- /Added by HTTrack -->
</html>
<hr>
</body>
<!-- Mirrored from cppreference.com/stdmem/all.html by HTTrack Website Copier/3.x [XR&CO'2004], Tue, 22 Jan 2008 06:24:23 GMT -->
<!-- Added by HTTrack --><meta http-equiv="content-type" content="text/html;charset=iso-8859-1"><!-- /Added by HTTrack -->
</html>