jincheng.rar_jincheng_进程管理

#include<iostream.h> #include<malloc.h> #define null 0 #include<stdlib.h> typedef struct node {char data; struct node *next; }linklist; linklist *p1,*r1; linklist *p2,*r2; linklist *p3,*r3; void help() { cout<<"c 创建进程"<<endl; cout<<"e 进程结束"<<endl; cout<<"b 进程阻塞"<<endl; cout<<"w 进程激活"<<endl; cout<<"t 时间片到"<<endl; cout<<"q 退出"<<endl; cout<<"o 显示"<<endl; } ///////////////////////////创建进程/////////////////////// void C() { //char ch; linklist *s; s=(linklist *)malloc(sizeof(linklist)); cout<<"请输入将要创建的进程:"<<endl; cin>>s->data; if(p2->next!=null) { s->next =r1->next; r1->next=s; r1 = s; } else { s->next=null; r2->next=s; } } //////////////////输出现有的进程状态////////////////////////// void OUT() { linklist *s; cout<<"就绪进程有:"<<endl; s=p1->next ; while(s != NULL) { cout<<s->data<<" "; s=s->next; } cout<<endl; cout<<"执行进程有:"<<endl; s = p2->next; if(s==NULL) { cout<<endl; } else cout<<s->data; cout<<endl; cout<<"阻塞进程有:"<<endl; s = p3->next; while(s!= NULL) { cout<<s->data<<" "; s=s->next; } cout<<endl; } /////////////////////结束进程//////////////////////// void E() { if( p2->next != NULL) { if(p1->next != NULL) { cout<<"当前进程已结束"<<endl; p2->next->data = p1->next->data; p1=p1->next; } else { p2->next = null; cout<<"当前已无进程可操作"<<endl; } } else { cout<<"当前无进程活动，请创建进程"<<endl; } } ///////////////////////堵塞进程//////////////////////// void B() { linklist *s; cout<<"阻塞当前进程"<<endl; if(p2->next != NULL) { { if(p1->next != NULL) {s=new linklist; s->data = p2->next->data; s->next = r3->next; r3->next = s; r3 = s; p2->next->data = p1->next->data; p1=p1->next;} else { s=new linklist; s->data = p2->next->data; s->next = r3->next; r3->next = s; r3 = s; p2->next = NULL; cout<<"请创建新进程"<<endl; } } } else cout<<"警告：执行态无进程"<<endl; } ///////////////////////////激活进程////////////////////// /*void W() { linklist *s; if(p3->next != null) { if(p2->next != null) { cout<<"阻塞进程已唤醒"<<endl; s=new linklist; s->data = p3->next->data ; s->next = r1->next ; r1->next = s; r1 = s; s= NULL; if(p3->next->next != null) { p3->next = p3->next->next; } else { p3 = r3; } } else { s=new linklist; s->data =p3->next->data; s->next=null; r2->next = s; s=NULL; if(p3->next->next != null) { p3->next = p3->next->next; } else { p3 = r3; } } } else { cout<<"警告：阻塞态内无进程"<<endl; } }*/ ////////////////////////////时间片到//////////////////////////// void T() { linklist *s; if(p2->next != NULL) { cout<<"时间片到"<<endl; s=new linklist; s->data = p2->next->data; s->next = r1->next; r1->next = s; r1 = s; p2->next->data = p1->next->data; p1->next=p1->next->next; } else cout<<"警告：执行态内无进程活动"<<endl; } //////////////////////主函数///////////////////////////// void main() { char ch; p1=new linklist;p1->next=null;r1=p1; p2=new linklist;p2->next=null;r2=p2; p3=new linklist;p3->next=null;r3=p3; help(); do { cout<<"请输入操作命令:"<<endl; cin>>ch; if(ch=='c') C(); if(ch=='e') E(); if(ch=='b') B(); if(ch=='o') OUT(); }while(ch!='q'); }