void * memset ( void * ptr, int value, size_t num );
Fill block of memory
Sets the first num bytes of the block of memory pointed by ptr to the specified value (interpreted as an unsigned char).
Parameters
- ptr
- Pointer to the block of memory to fill.
- value
- Value to be set. The value is passed as an int, but the function fills the block of memory using the unsigned char conversion of this value.
- num
- Number of bytes to be set to the value.
#include <stdio.h>
#include <string.h>
int main () {
char str[] = "almost every programmer should know memset!";
memset (str,'-',6); puts (str);
return 0;
}
銀幕輸出
------ every programmer should know memset!
http://www.cplusplus.com/reference/clibrary/cstring/memset/
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