Memset () [C language library function source code]

[C language library function source code]

[This program is compiled in Dev C ++ 4.9.9.2]

/*

Sets the first "count" bytes of the memory starting at "DST"

To the character value "Val ".

Set the first count bytes of the memory area referred to by DST to Val. Returns the pointer to DST.

In practical applications, we sometimes use the malloc function to apply for some memory space.

Memory space sometimes needs initialization. memset is often used for initialization.

For example:

Int * P;

P = (int *) malloc (0x400 * sizeof (INT ));

Memset (p, 400 X );

*/

Void * my_memset (void * DST, int Val, int count)

{

Void * P = DST;

While (count --)

{

* (Char *) DST = (char) val;

DST = (char *) DST + 1;

}

Return P;

}

Int main ()

{

Char STR [] = "ammana_babi ";

My_memset (STR, 'z', strlen (STR ));

Puts (STR );

System ("pause ");

Return 0;

}