size_t
From cppreference.com
| Defined in header <stddef.h>
|
||
| Defined in header <stdio.h>
|
||
| Defined in header <stdlib.h>
|
||
| Defined in header <string.h>
|
||
| Defined in header <time.h>
|
||
| Defined in header <uchar.h>
|
(since C11) |
|
| Defined in header <wchar.h>
|
(since C95) |
|
| typedef /*implementation-defined*/ size_t; |
||
size_t is the unsigned integer type of the result of sizeof , alignof (since C11) and offsetof.
Notes
size_t can store the maximum size of a theoretically possible object of any type (including array).
size_t is commonly used for array indexing and loop counting. Programs that use other types, such as unsigned int, for array indexing may fail on, e.g. 64-bit systems when the index exceeds UINT_MAX or if it relies on 32-bit modular arithmetic.