标题: 时间片轮转法与优先调度算法，进程调度，C代码 [打印本页]

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作者: yuyang911220    时间: 2015-5-28 08:49     标题: 时间片轮转法与优先调度算法，进程调度，C代码

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "ctype.h"
#include "conio.h"
#include "malloc.h"
typedef struct node
{
   charname[10];
   intprio;  
   intround;
   int cputime;
   int needtime;
   intcount;
   char state;
   struct node *next;
}PCB;
PCB *finish,*ready,*tail,*run;
int N;

void firstin()
{
  run=ready;  
  run->state='R';  
  ready=ready->next;
}

void prt1(char a)
{
  if(toupper(a)=='P')
     printf(" name    cputime  needtime priority  state\n");
   else
     printf(" name    cputime needtime  count  round    state\n");
}

void prt2(char a,PCB *q)
{
  if(toupper(a)=='P')
     printf("  %-10s%-10d%-10d%-10d%c\n",q->name,
      q->cputime,q->needtime,q->prio,q->state);
   else
     printf("  %-10s%-10d%-10d%-10d%-10d%-c\n",q->name,
      q->cputime,q->needtime,q->count,q->round,q->state);
}

void prt(char algo)
{
   PCB *p;
  prt1(algo);
   if(run!=NULL)
     prt2(algo,run);
  p=ready;
   while(p!=NULL)
   {
     prt2(algo,p);
     p=p->next;
   }
  p=finish;
   while(p!=NULL)
   {
     prt2(algo,p);
     p=p->next;
   }
  getch();
}

void insert1(PCB *q)
{
   PCB *p1,*s,*r;
   int b;
   s=q;
   p1=ready;
   r=p1;
   b=1;
  while((p1!=NULL)&&b)
     if(p1->prio>=s->prio)
     {
  r=p1;
  p1=p1->next;
     }
     else
  b=0;
  if(r!=p1)
   {
     r->next=s;
     s->next=p1;
   }
   else
   {
     s->next=p1;
     ready=s;
   }
}

void insert2(PCB *p2)
{
  tail->next=p2;
   tail=p2;
   p2->next=NULL;
}

void create1(char alg)
{
   PCB *p;
   int i,time;
   char na[10];
   ready=NULL;
  finish=NULL;
   run=NULL;
   printf("Enter name and time ofprocess\n");
   for(i=1;i<=N;i++)
   {
     p=(PCB *)malloc(sizeof(PCB));
     scanf("%s",na);
     scanf("%d",&time);
     strcpy(p->name,na);
     p->cputime=0;
     p->needtime=time;
     p->state='w';
     p->prio=50-time;
     if(ready!=NULL)
  insert1(p);
     else
     {
  p->next=ready;
  ready=p;
     }
   }
   //clr11();
  printf("         output of priority:\n");
  printf("************************************************\n");
  prt(alg);
   run=ready;
   ready=ready->next;
   run->state='R';
}

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