memset
Fills the first length characters of an object with a specified value (function or macro)
#include <string.h>
void *memset (
void *s,
int c,
size_t length);
memset returns s.
The memset function or macro fills the first length characters of the object pointed to by s with the value c.
#include <string.h>
main ()
{
char buffer[80];
memset (buffer, ’=’, 80);
}