#include??
#include??
#include?
#include?

#define?SIZE?15
?
static?sem_t?mutex;??
static?sem_t?fullempty;?

struct?product{?
????char?products[SIZE];?
????int?firstend;?
????int?num;?????????????????
};
struct?product?*p;

void?*producter（）?
{
	char?c;
	while（1）{?
		sem_wait（&empty）;?
???		sem_wait（&mutex）;
		c=‘a‘+rand（）?%?26;
		p->products[p->end]=c;
		p->end=（p->end+1）%SIZE	;
		p->num=p->num+1;
		printf（“proceducer生產了%c.........產品總數為%d\n“cp->num）;?????
		sem_post（&mutex）;
		sem_post（&full）;
		sleep（rand（）%3）;
	}???????????
}

void?*consumer（）?
?{
	char?c;
	while（1）{?
		sem_wait（&fu