memset的作用是什么？

[skiptomylou]

比如memset( &stinfo, 0, sizeof( stinfo ));

[ndy_w]

把一段内存用固定数填充。
stinfo: 内存地址
0：填充为0
sizeof(stinfo)：填充这么多个字节

[u2m]

开辟内存，填充

[allenhai1980]

个人觉得是初始化内存的最佳方式。

[foxfur]

一般用这个函数初始化分配的内存！
但是要是用来填充固定的数（非0），就要注意，这个函数是对字节操作的！！

[zxszx]

初始化内存,和ZeroMemory功能相似

[ckp]

初始话内存，用指定的字节填充内存

[joy0861]

简单的说就是初始化内存,这段英文解释会有用的.


memset
Sets buffers to a specified character.

void *memset( void *dest, int c, size_t count );

Routine Required Header Compatibility
memset <memory.h> or <string.h> ANSI, Win 95, Win NT


For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB Single thread static library, retail version
LIBCMT.LIB Multithread static library, retail version
MSVCRT.LIB Import library for MSVCRT.DLL, retail version


Return Value

memset returns the value of dest.

Parameters

dest

Pointer to destination

c

Character to set

count

Number of characters

Remarks

The memset function sets the first count bytes of dest to the character c.

Example

/* MEMSET.C: This program uses memset to
* set the first four bytes of buffer to "*".
*/

#include <memory.h>
#include <stdio.h>

void main( void )
{
char buffer[] = "This is a test of the memset function";

printf( "Before: %s\n", buffer );
memset( buffer, '*', 4 );
printf( "After: %s\n", buffer );
}


Output

Before: This is a test of the memset function
After: **** is a test of the memset function