pcb结构定义

#include<stdio.h>
#include<stdio.h> #include<malloc.h>  
typedef struct ProcessNode{            //  进程结点的基本结构    
char name;           //进程名 
int service_time;    //服务时间 
int arrive_time;     //到达时间 
int priority;        //优先级   
struct FCFS_time{       //先到先服务  
int finish_time;      //完成时间      
int turnaround_time;  //周转时间   
float weigtharound_time;//带权周转时间 
}FCFS_time;       
struct SJF_time{       //短作业优先  
int finish_time;           
int turnaround_time;   
float weigtharound_time;   
int flag;   }SJF_time;       
struct RR_time{       //时间片轮转的结点  
int finish_time;            
int turnaround_time;    
float weigtharound_time;    
int flag_time;//赋值为进程的服务时间，为0则进程完成 
}RR_time;       
struct Pri_time{       //优先权非抢占式  
int finish_time;          
 int turnaround_time;     
float weigtharound_time; 
}Pri_time;   
struct ProcessNode*next;
}ProcessNode,*Linklist;   
void main() {         
int choice;
Linklist  p,head;
Linklist read_information(); 
Linklist FCFS_scheduling(Linklist  head);    
Linklist SJF_scheduling(Linklist  head);    
Linklist RR_scheduling(Linklist  head);    
Linklist Pri_scheduling(Linklist  head);   
head=read_information();//读入进程的基本信息 
do{             
p=head->next;        
printf(" ");   
printf("**********进程初始信息输出********** "); //输出初始化后的进程基本信息  
printf(" ");     
printf("进程名称  ");        
printf("到达时间  ");        
printf("服务时间  ");        
printf("优先级  ");        
printf(" ");  
while(p)   {          
printf("   %c ",p->name);      
printf("         %d     ",p->arrive_time);          
printf("    %d     ",p->service_time);         
printf("   %d ",p->priority);          
printf(" ");       p=p->next;   }      
printf(" ");        
printf("************************************ ");//输出进程的调用选择项   
printf(" ");   
printf("1、FCFS----先到先服务 ");  
printf("2、SJF-----短作业优先 ");  
printf("3、RR------时间片轮转 ");  
printf("4、Pri-----优先权调度 ");        
printf("5、退出 ");    printf(" ");   
printf("************************************ "); 
printf(" ");   
printf("请在1—5之间选择:  "); 
scanf("%d",&choice);    
printf(" ");         
printf(" ");
switch(choice)    
{         
case 1:  FCFS_scheduling(head);            
break;      
case 2:  SJF_scheduling(head);           
break;       
case 3:  RR_scheduling(head);                  
break;      
case 4:  Pri_scheduling(head);                  
break;  
//      case 5:  exit();    
}   
}while(choice!=5);      
}   
Linklist read_information()//进程读入函数
{    
int i;    
int num;    
// ProcessNode  
 Linklist pro;  
Linklist p;    
Linklist head;    
printf(" ");     
printf("************进程调度算法************ "); 
printf(" ");  
printf("请输入进程的个数:");    
scanf("%d",&num);  
printf(" ");  
printf("*************初始化信息************* "); 
printf(" ");       
head=(Linklist)malloc(sizeof(ProcessNode));//头结点 
head->next=NULL; 
p=head;    
for(i=1;i<=num;i++)   {         
pro=(Linklist)malloc(sizeof(ProcessNode));//创建进程结点           
printf(" 输入第%d个进程信息: ",i);
printf("    请输入进程名: ");  
fflush(stdin);   
scanf("%c",&pro->name);  
printf("        到达时间: ");  
scanf("%d",&pro->arrive_time);  
printf("        服务时间: ");       
scanf("%d",&pro->service_time);   
printf("        优先级↑: ");   
scanf("%d",&pro->priority);      
//pro->next=head->next;  head->next=pro;//逆序建链           
p->next=pro;  p=pro;//顺序建链  
//p++;    
pro->next=NULL;   
}     
printf(" ");    
return head;
}    
Linklist FCFS_scheduling(Linklist head)//先到先服务算法函数
{       
Linklist p;    
Linklist q;//指向前一进程    
p=head->next;        
while(p) //初始化进程的完成时间、周转时间、带权周转时间，初值均赋为0 
{    
p->FCFS_time.finish_time=0;  
 p->FCFS_time.turnaround_time=0;   
p->FCFS_time.weigtharound_time=0;      
p=p->next;  
}       
p=q=head->next;     
p->FCFS_time.finish_time=p->arrive_time;//避免第一个进程到达时间不为0    
while(p) 
{       
if(p->arrive_time<=q->FCFS_time.finish_time)//下一进程已到达，在等待中     
{          
p->FCFS_time.finish_time=(p->service_time)+(q->FCFS_time.finish_time);//服务时间
p->FCFS_time.turnaround_time=(p->FCFS_time.finish_time)-(p->arrive_time);//周转时间    
p->FCFS_time.weigtharound_time=(float)(p->FCFS_time.turnaround_time)/(p->service_time);//带权周转时间     
}     
else     
{    
p->FCFS_time.finish_time=p->service_time+p->arrive_time;//服务时间          
p->FCFS_time.turnaround_time=(p->FCFS_time.finish_time)-(p->arrive_time);//周转时间   
p->FCFS_time.weigtharound_time=(float)(p->FCFS_time.turnaround_time)/(p->service_time);//带权周转时间     
}   
q=p;   
p=p->next;      
}      
p=head->next;     
printf("******************************** FCFS ******************************** ");//输出先到先服务调度后的进程信息  
printf(" ");     
printf("进程名称  ");        
printf("到达时间  ");        
printf("服务时间  ");        
printf("优先级  ");  
printf("完成时间  ");   
printf("周转时间  ");       
printf("带权周转时间  ");                  
printf(" ");    
while(p) 
{     
 printf("   %c ",p->name);    
printf("         %d     ",p->arrive_time);         
printf("    %d     ",p->service_time);        
printf("   %d ",p->priority);       
printf("       %d",p->FCFS_time.finish_time);        
printf("        %d",p->FCFS_time.turnaround_time);        
printf("          %0.2f",p->FCFS_time.weigtharound_time);        
printf(" ");  
p=p->next;    }    
printf(" ");    
printf("********************************************************************** ");   
printf(" ");  
return head;
}     
Linklist SJF_scheduling(Linklist  head)//短作业优先算法
{   
Linklist p,r;   
Linklist q;//指向前一进程结点     
int num=0;//记录进程个数    
int add_flag=0;//进程完成服务个数 
int service_time_min; 
int arrive_time; 
int k;  
p=head->next;//首元结点      
while(p) //初始化进程的完成时间、周转时间、带权周转时间，初值均赋为0 
{    
p->SJF_time.finish_time=0;   
p->SJF_time.turnaround_time=0;   
p->SJF_time.weigtharound_time=0;  
p->SJF_time.flag=0;   
++num;   
q=p;      
p=p->next;   
}     
q->next=head->next;//将创建的进程队列变为循环队列    
p=head->next;
q=p;  
p->SJF_time.finish_time=p->arrive_time+p->service_time;     
p->SJF_time.turnaround_time=(p->SJF_time.finish_time)-(p->arrive_time);//周转时间     
p->SJF_time.weigtharound_time=(float)(p->SJF_time.turnaround_time)/(p->service_time);//带权周转时间 
q->SJF_time.finish_time=p->SJF_time.finish_time;     
p->SJF_time.flag=1;  add_flag=1;  
p=p->next;     
do{      
if(p->SJF_time.flag==1){p=p->next;}      
else if((p->arrive_time)>(q->SJF_time.finish_time))   
{           
service_time_min=p->service_time;      
arrive_time=p->arrive_time;        
while(p->arrive_time==arrive_time&&p->SJF_time.flag==0)//寻找最短的作业          
{
if((p->next->service_time)<(p->service_time)){service_time_min=p->next->service_time;p=p->next;
}                
else {p=p->next;}     
}               
p=q->next;         
r=q;             
while(p->service_time!=service_time_min){p=p->next;}//指针指向最短作业            
p->SJF_time.finish_time=p->arrive_time+p->service_time;            
p->SJF_time.flag=1;++add_flag;               
p->SJF_time.turnaround_time=(p->SJF_time.finish_time)-(p->arrive_time);//周转时间                  
p->SJF_time.weigtharound_time=(float)(p->SJF_time.turnaround_time)/(p->service_time);//带权周转时间                     
q=p;
p=r->next;   
}          
else     
{           
k=0;           
service_time_min=p->service_time;                     
while(((p->arrive_time)<=(q->SJF_time.finish_time))&&k<=num)//寻找最短的作业        
{                        
if(p->SJF_time.flag==1)
{p=p->next;++k;}          
else  if((p->SJF_time.flag!=1)&&((p->service_time)<service_time_min))               
{
service_time_min=p->service_time;                      
p=p->next;++k;
}                    
else { p=p->next;++k; }        
}                  
p=q->next;           
r=q;                   
while(p->service_time!=service_time_min){p=p->next;}//指针指向最短作业                                        
p->SJF_time.finish_time=q->SJF_time.finish_time+p->service_time;                        
p->SJF_time.turnaround_time=(p->SJF_time.finish_time)-(p->arrive_time);//周转时间                    
p->SJF_time.weigtharound_time=(float)(p->SJF_time.turnaround_time)/(p->service_time);//带权周转时间                       
p->SJF_time.flag=1;
++add_flag;               
//q=p;p=p->next;        
q=p;p=r->next;        
}     
}while(add_flag!=num);       
for(p=head->next;num>0;num--)//断开循环队列
{      
q=p;
p=p->next;  
}  
q->next=NULL;       
p=head->next;//指向链首，输出短作业调度后的进程信息    
printf(" ");     
printf("******************************** SJF ********************************* ");  
printf(" ");    
printf("进程名称  ");        
printf("到达时间  ");        
printf("服务时间  ");        
printf("优先级  ");  
printf("完成时间  ");   
printf("周转时间  ");       
printf("带权周转时间  ");                  
printf(" ");    
while(p) 
{      
printf("   %c ",p->name);    
printf("         %d     ",p->arrive_time);         
printf("    %d     ",p->service_time);        
printf("   %d ",p->priority);       
printf("       %d",p->SJF_time.finish_time);        
printf("        %d",p->SJF_time.turnaround_time);        
printf("          %0.2f",p->SJF_time.weigtharound_time);        
printf(" ");   p=p->next;    }    
printf(" ");    
printf("********************************************************************** ");   
printf(" ");    
return head;
}    
Linklist RR_scheduling(Linklist  head)//时间片轮转算法
{ 
Linklist q;//指向前一进程结点    
Linklist p;  
int q_time;//时间片大小  
int num=0;//记录进程个数    
int add_flag=0;//进程完成服务个数
printf("请输入时间片的大小:  "); 
scanf("%d",&q_time);       
p=head->next;     
while(p) //初始化进程的完成时间、周转时间、带权周转时间，初值均赋为0 
{    
p->RR_time.finish_time=0;   
p->RR_time.turnaround_time=0;   
p->RR_time.weigtharound_time=0;   
p->RR_time.flag_time=p->service_time;   
q=p;   
++num;      
p=p->next;   
}    
q->next=head->next;//将创建的进程队列变为循环队列    
p=head->next;     
q->RR_time.finish_time=p->arrive_time; 
do{        
/* printf(" ");          
printf("************************************************************** ");             
printf("   %c ",p->name);        
printf("         %d     ",p->arrive_time);          
printf("    %d     ",p->service_time);          
printf("   %d ",p->priority);        
printf("       %d",p->RR_time.finish_time);          
printf(" "); */        
if((p->RR_time.flag_time)>(q_time))//服务时间大于时间片   
{        
p->RR_time.finish_time=(q->RR_time.finish_time)+(q_time);//累加完成时间             
p->RR_time.flag_time=(p->RR_time.flag_time)-(q_time);     
if((p->next->arrive_time)<=(p->RR_time.finish_time))//有进程等待    
{
q=p;
p=p->next;
}     
else     //当前进程未完成，无进程等待，指针不向后移    
{ q=p; }    
}        
else if((p->RR_time.flag_time)==0)//进程已经完成     
{      
p=p->next;     
}            
else
{
p->RR_time.finish_time=(q->RR_time.finish_time)+(p->RR_time.flag_time);                
p->RR_time.flag_time=0; ++add_flag;                
p->RR_time.turnaround_time=(p->RR_time.finish_time)-(p->arrive_time);//周转时间            
p->RR_time.weigtharound_time=(float)(p->RR_time.turnaround_time)/(p->service_time);//带权周转时间                
if((p->next->arrive_time)<(p->RR_time.finish_time))//有进程等待    
{ q=p;p=p->next; }        
else     //当前进程完成，无进程等待，指针向后移     
//{  q=p; q->RR_time.finish_time=p->next->arrive_time;  }    
{p=p->next;q=p;q->RR_time.finish_time=p->arrive_time;}     
}    }while(add_flag!=num); 
//}while(p->RR_time.flag==0);        
for(p=head->next;num>0;num--)//断开循环队列 
{      
q=p;p=p->next;  
}  
q->next=NULL;       
p=head->next;//指向链首，输出时间片轮转调度后的进程信息    
printf(" ");     
printf("******************************** RR ********************************** ");  
printf(" ");     
printf("进程名称  ");        
printf("到达时间  ");        
printf("服务时间  ");        
printf("优先级  ");  
printf("完成时间  ");   
printf("周转时间  ");       
printf("带权周转时间  ");                  
printf(" ");    
while(p) 
{      
printf("   %c ",p->name);    
printf("         %d     ",p->arrive_time);         
printf("    %d     ",p->service_time);        
printf("   %d ",p->priority);       
printf("       %d",p->RR_time.finish_time);        
printf("        %d",p->RR_time.turnaround_time);        
printf("          %0.2f",p->RR_time.weigtharound_time);        
printf(" ");
p=p->next;   
}    
printf(" ");    
printf("********************************************************************** ");   
printf(" ");   
return head; }   
Linklist Pri_scheduling(Linklist  head)//优先权调度算法
{
printf("   优先权调度算法    ");    
return head;
}