模拟写优先的读者写者问题

int i=0;
process *p,*q;
input();
printf("\n以下输出各时间片进程状态\n");
printf("<运行时如需暂停请输入P>\n");
Sleep(1000);
while((process1!=NULL)||(process2!=NULL)||(process3!=NULL))
{
p->next=process2;
process2=process2->next;
p=p->next;
p->next=NULL;
readcount++;
}
if(t==1)
{
p=process3;
process3=process3->next;
q=q->next;
p->next=NULL;
}
fclose(fp);
p=process1;
process1=process1->next;
p->next=NULL;
free(p);
break;
default :
{
p=(process *)malloc(sizeof(process));
q->next=p;
fscanf(fp,"%d %c %d %d",&p->name,&p->type,&p->starttime,&p->needtime);
p->runtime=0;
}
}
if(readcount>0)
{
p->next=process2;
process2=process2->next;
p=p->next;
p->next=NULL;
readcount++;
}
if((readcount==0)&&(wait(mutex)==1))
p=process3;
if(process3==NULL)
{
p=process3=(process *)malloc(sizeof(process));
p->next=NULL;
t=1;
}
else
{
while(p->next!=NULL)
{
p=p->next;
printf("读写时间:");
scanf("%d",&p->needtime);
printf("\n");
p->runtime=0;
q=q->next;
p->next=NULL;
}
p=process1;
process1=process1->next;
p->next=NULL;
free(p);
break;
case 2:
if((fp=fopen("123.txt","r"))==NULL)
{
printf("文件打开失败!\n");
exit(0);
}
while(!(feof(fp)))
q->next=NULL;
t=1;
}
else
{
while(q->next!=NULL)
{
q=q->next;
}
}
j=(process *)malloc(sizeof(process));
j->next=process1;
/* while(process1->starttime==i)
scanf("%d",&a);
q->starttime=a+i;
printf("\n");
printf("读写时间:");
scanf("%d",&q->needtime);
q->runtime=0;
q->next=NULL;
if(process1!=NULL)
{
while(p->next!=NULL)
{
q->next=process1;
process1=process1->next;
q=q->next;
q->next=NULL;
j->next=process1;
if(process1==NULL)
break;
}
p=process1;
*/ while(p!=NULL)
free(p);
}
}
int wait(int &a)
{
if(a<=0)
{
return 0;
}
a--;
return 1;
}
void signal(int &a)
{
a++;
} Βιβλιοθήκη void Reader()
{
process *p;
int t=0;
}
}
void sort()
{
process *p,*q,*j,*k;
j=p=(process *)malloc(sizeof(process));
p->next=NULL;
k=q=(process *)malloc(sizeof(process));
q->next=NULL;
p->next=NULL;
free(p);
}
}
void Writer()
{
if((wait(mutex)==1)&&(process3==NULL))
{
process3=process2;
process2=process2->next;
process3->next=NULL;
k->next=NULL;
free(k);
if(process2!=NULL)
{
p->next=q;
}
else
process2=q;
}
void add(int i)
{
process *p,*q;
int a;
p=process1;
q=(process *)malloc(sizeof(process));
printf("\n请选择:");
aa:
fflush(stdin);
scanf("%d",&a);
switch(a)
{
case 1:
printf("输入进程数：");
int i,j;
scanf("%d",&i);
for(j=1;i>0;i--,j++)
}
else
{
q->next=process2;
process2=process2->next;
q=q->next;
q->next=NULL;
}
}
process2=j->next;
j->next=NULL;
free(j);
q=k->next;
while(process2!=NULL)
{
if((process2->type=='w')||(process2->type=='W'))
{
p->next=process2;
process2=process2->next;
p=p->next;
p->next=NULL;
{
p=(process *)malloc(sizeof(process));
q->next=p;
printf("第%d个进程:\n",j);
printf("进程序号:");
scanf("%d",&p->name);
printf("\n");
printf("输入错误，重新输入:");
goto aa;
}
}
void ready(int i)
{
process *p,*q,*j,*k;
p=process1;
q=process2;
int t=0;
if(process2==NULL)
{
q=process2=(process *)malloc(sizeof(process));
{
i++;
if(process1!=NULL)
ready(i);
//if(process3!=NULL)
//if((process3->type=='w')||(process3->type=='W'))