#include<iostream>
using namespace std;
#define  N  3
struct  PCB
{
	char name[8];
	int  arrive_time;
	int  run_time;
    int finish_time;
	int  zhouzhuan_time;
	float daiquan_time;
};

float sumzhouzhuantime,sumdaiquanzhouzhuantime;
struct PCB pcb[N],temp;

void input();  //输入进程
void sort();      //对输入的进程按到达时间进行排序执行
void output();   //输出算法调度时间表

int  main()
{   
    input();
	sort( );
	output();
}

void input()
{
    int i;
	cout<<"--------------------------------------"<<endl;
	cout<<"             FCFS调度算法     "<<endl;
    cout<<"--------------------------------------"<<endl;
	cout<<"      输入五个进程信息:"<<endl;
	for ( i=0;i<N;i++)
	{
		printf("请输入进程名:\n" );
        scanf("%s",pcb[i].name);
		printf("请输入到达时间:");
		scanf("%d",&pcb[i].arrive_time);
		printf("请输入要运行时间:");
		scanf("%d",&pcb[i].run_time);		
	}
	cout<<"各进程:"<<endl;
	for( i=0;i<N;i++)
	{  	printf("%s    ",pcb[i].name);
        printf("%d    ",pcb[i].arrive_time);
		printf("%d \n",pcb[i].run_time);
    }
}

void sort()//按照到达时间对进程进行排序 
{
	for(int i=0;i<N-1;i++)
	{
		for(int j=i+1;j<N;j++)
		{
			if(pcb[i].arrive_time>pcb[j].arrive_time)
			{
				temp=pcb[i];
				pcb[i]=pcb[j];
				pcb[j]=temp;
			}
		}
	} 
}

void  output()
{   
	int i;
	cout<<"FCFS调度算法:"<<endl;
    	pcb[0].finish_time=pcb[0].arrive_time+pcb[0].run_time;
     	pcb[0].zhouzhuan_time=pcb[0].finish_time-pcb[0].arrive_time;
		pcb[0].daiquan_time=(float)pcb[0].zhouzhuan_time/pcb[0].run_time;
  	for(i=1;i<N;i++)
	{	 
	 	if(pcb[i].arrive_time>pcb[i-1].finish_time)
		{
              pcb[i].finish_time=pcb[i].arrive_time+pcb[i].run_time;
              pcb[i].zhouzhuan_time=pcb[i].run_time;
              pcb[i].daiquan_time=(float)pcb[i].zhouzhuan_time/pcb[i].run_time;
		}
		else
		{
            pcb[i].finish_time=pcb[i-1].finish_time+pcb[i].run_time;
            pcb[i].zhouzhuan_time=pcb[i].finish_time-pcb[i].arrive_time;
			pcb[i].daiquan_time=(float)pcb[i].zhouzhuan_time/pcb[i].run_time;
		}
    	
	}  

	for(i=0;i<N;i++)
		{
			sumzhouzhuantime+=pcb[i].zhouzhuan_time;
			sumdaiquanzhouzhuantime+=pcb[i].daiquan_time;
		}

    printf("----------------------------------------------------------------\n");
    printf("进程名   到达时间  运行时间  完成时间  周转时间    带权周转时间  \n");
	printf("----------------------------------------------------------------\n");
    for(i=0;i<N;i++)
	{
	  	printf(" %s        %d         %d         %d         %d         %.2f\n",pcb[i].name,pcb[i].arrive_time,pcb[i].run_time,pcb[i].finish_time,pcb[i].zhouzhuan_time,pcb[i].daiquan_time);

	}
	cout<<"平均周转时间:"<<sumzhouzhuantime/N<<endl;
	cout<<"平均带权周转时间:"<<sumdaiquanzhouzhuantime/N<<endl;
    printf("----------------------------------------------------------------\n");
}