#include <stdio.h>
#include <stdlib.h>
//#include <unistd.h>
//#include <conio.h>
#define getpch(type) (type*)malloc(sizeof(type))
//#define NULL 0
struct pcb{
char name[10]; //进程名
char state; //进程状态标示 （就绪/执行）
int ntime; //进程所需执行时间
int rtime; //用时间片总时间
struct pcb* link; //指向下一个进程的指针
}*ready=NULL, *p;
typedef struct pcb PCB;
int start; //菜单控制标志
void sort() //进程按指定算法链接
{
PCB *end, *recent;
int inlist=0; //表示进程已经插到链表最后
if(ready==NULL)
{
ready=p;
}
else
{
recent=ready;
end=recent->link;
while(end!=NULL)
{
recent=recent->link;
end=end->link;
}
if(end==NULL)
recent->link=p;
} //end else
}
void input() //进程输入函数
{
int i,num;
printf("\nPlease input the number of processes:");
scanf("%d",&num); //定义进程个数 num
for(i=0;i<num;i++)
{
printf("\nProcess NO.%d:\n",i);
p=getpch(struct pcb);
//进程信息录入
printf("\nInput the name of the process:");
scanf("%s",p->name);
printf("\nInput the running time of the process:");
scanf("%d",&p->ntime);
printf("\n");
p->rtime=0; //进程占有cpu的时间
p->state='w'; //进程就绪状态
p->link=NULL;
sort(); //每输入一个进程链接一次 共调用了 num 次
}
}
int space() //统计链表中的进程数
{
int l=0;
PCB *pr=ready;
while(pr!=NULL)
{
l++; //用于记录链表中的进程数
pr=pr->link;
}
return(l);
}
void disp(PCB *pr) //打印显示当前正在执行的进程的相关信息
{
printf("\nqname\tstate\tndtime\truntime\n");
printf("|%s\t",pr->name);
printf("|%c\t",pr->state);
printf("|%d\t",pr->ntime);
printf("|%d\t",pr->rtime);
printf("\n");
}
void check()
{
PCB *pr;
printf("\n *********The current running process is: %s\n",p->name);
disp(p);
pr=ready; //记住表头进程
printf("\n *********The state of the Waiting List:\n");
while(pr!=NULL) //打印出剩余的所有进程的相关信息
{
disp(pr);
pr=pr->link;
}
if(pr==NULL)
printf("\nNo waiting process!\n");
}
void destroy() //打印进程执行信息提示
{
printf("\nProcess [%s] has finished.\n",p->name);
free(p); //释放临时变量p的内存空间
}
void running()
{
(p->rtime)++; //??????????????????????????????????????????????
if(p->rtime==p->ntime)
destroy();
else
{
// (p->super)--;
p->state='w';
sort(); //重新插入链表
}
}
/*******************************************************************菜单函数********/
void Menu()
{
/******************* 菜单选项 *****************************************/
char menu;
printf(" **********************************************************************\n");
printf(" ** **\n");
printf(" ** **\n");
printf(" ** MENU DIRECTION **\n");
printf(" ** **\n");
printf(" ** y: ENTER SIMULATE **\n");
printf(" ** e: PROCESS INTRODUCTION **\n");
printf(" ** **\n");
printf(" ** q: QUIT PROCESS **\n");
printf(" ** **\n");
printf(" ** author: qhu07 xuzikun **\n");
printf(" **********************************************************************\n\n");
printf("Please input your choice!\n");
scanf("%c",&menu);
switch(menu) //菜单选项
{
case 'Y':
case 'y':
start=1;
system("cls");
printf("\n*** MODE OF SIMILATE! ***\n***时间片进程调度***\n");
break;
case 'e':
case 'E':
system("cls");
printf("时间片进程调度模拟\n"); //说明文件的加载;
break;
case 'q':
case 'Q':
exit(0);
break;
default:
exit(0);
break;
}
}
void main()
{
int len, h=0;
char ch;
Menu();
if(start==1)
{
input();
len=space();
while((len!=0)&&(ready!=NULL)) //条件判断是否赘言？？？？？？？？？？
{
ch=getchar();
h++;
printf("\n The execute number: %d \n",h);
//取出最大优先数的进程 即链表表头进程
p=ready;
ready=p->link;
p->link=NULL;
p->state='R';
//////////
check();
running();
printf("\nProcess Any Key to Continue...");
ch=getchar();
}
printf("\n\nAll the processes has finished running");
ch=getchar();
}
}
