#include<stdio.h>
#include<stdlib.h>
int full=0,empty=3,x=0;
main()
{
int n;
void producer();
void consumer();
int wait(int);
int signal(int);
printf("\n1.PRODUCER\n2.CONSUMER\n3.EXIT\n");
while(1)
{
printf("\nENTER YOUR CHOICE\n");
scanf("%d",&n);
switch(n)
{
case 1:
if(empty!=0)
producer();
else
printf("BUFFER IS FULL");
break;
case 2:
if(full!=0)
consumer();
else
printf("BUFFER IS EMPTY");
break;
case 3:
exit(0);
break;
}
}
}
 
int wait(int s)
{
return(--s);
}
 
int signal(int s)
{
return(++s);
}
 
void producer()
{
full=signal(full);
empty=wait(empty);
x++;
printf("\n Producer produces the item%d \n",x);
}
 
void consumer()
{
full=wait(full);
empty=signal(empty);
printf("\n Consumer consumes item%d \n",x);
x--;
}