tcp socket 辅导讲解、讲解socket 程序代码

class server//创ä¡ä建¡§服¤t务?器¡Â的Ì?类¤¨¤

{

public:

server()//服¤t务?器¡Â类¤¨¤构1造¨¬函¡¥数ºy

{

surplus_cpu=1;//初?始º?化¡¥剩º¡ê余®¨¤CPU为a1

surplus_memory=1;//初?始º?化¡¥剩º¡ê余®¨¤内¨²存ä?为a1

}

bool is_full()//判D断?服¤t务?器¡Â是º?否¤?已°?满¨²

{

if(surplus_memory<=0.0005||surplus_cpu<=0.00005)//取¨?值¦Ì为a两¢?属º?性?最Á?小?值¦Ì

return 1;

else

return 0;

}

bool overstep(double cpu,double memory)//判D断?是º?否¤?能¨¹将?进?程¨¬放¤?入¨?服¤t务?器¡Â中D

{

if(surplus_cpu-cpu>=0&&surplus_memory-memory>=0)

return 1;

else

return 0;

}

double is_fit(double cpu,double memory)//判D断?最Á?合?适º¨º服¤t务?器¡Â的Ì?进?程¨¬

{

e_percent=surplus_cpu*cpu+surplus_memory*memory;//计?算?进?程¨¬向¨°量¢?的Ì?内¨²积y

return e_percent;//向¨°量¢?内¨²积y

}

void lead_in(double cpu,double memory)//将?进?程¨¬放¤?入¨?服¤t务?器¡Â中D

{

surplus_cpu=cpu;

surplus_memory=memory;//剩º¡ê余®¨¤memory减?少¦¨´

};

~server()

{

quantity++;//一°?次ä?析?构1代䨲表À¨ª用®?完ª¨º一°?个?服¤t务?器¡Â，ê?建¡§立¢¡é在¨²动¡¥态¬?分¤?配?的Ì?基¨´础ä?上¦?

}

static int quantity;//服¤t务?器¡Â数ºy量¢?

private:

double surplus_cpu;

double surplus_memory;

double e_percent;//向¨°量¢?内¨²积y

};

【源文件】

#include<iostream>

#include"server.h"

#include<fstream>

int server::quantity=0;

using namespace std;

int main()

{

double data[1000][3];//创ä¡ä建¡§容¨Y纳¨¦进?程¨¬的Ì?二t维?数ºy组Á¨¦

ifstream infile;

infile.open("1000个?进?程¨¬CPU和¨ª内¨²存ä?占?用®?量¢?.Txt");//打䨰开a数ºy据Y文?件t

if(!infile.is_open())

{

cout<<"文?件t打䨰开a失º¡ì败㨹"<<endl;//检¨¬测a文?件t是º?否¤?打䨰开a

return 0;

}

for(int i=0;i<1000;i++)

{

for (int j=0;j<3;j++)

infile>>data[i][j];

};

infile.close();

server*x=new server();//创ä¡ä建¡§一°?个?服¤t务?器¡Â

for(int k=0;k<1000;k++)//从䨮第̨²一°?个?进?程¨¬开a始º?遍À¨¦历¤¨²

{

if(x->is_full())//检¨¬测a服¤t务?器¡Â是º?否¤?已°?满¨²

{

delete x;

server*x=new server();

}

double max_m=0;

int max_l=0;

for(int l=k;l<1000;l++)//开a始º?寻¡ã找¨°内¨²积y最Á?大䨮的Ì?进?程¨¬

{

if(x->overstep(data[l][1],data[l][2]))//判D断?进?程¨¬能¨¹否¤?放¤?入¨?进?程¨¬内¨²

{

double m=x->is_fit(data[l][1],data[l][2]);//得Ì?出?内¨²积y

if(m>max_m)//比À¨¨较?大䨮小?

{

max_m=m;

max_l=l;

}

}

if(max_l!=-1)//有®D进?程¨¬能¨¹够?放¤?到Ì?服¤t务?期¨²内¨²

{

x->lead_in(data[max_l][l],data[max_l][2]);

cout<<data[max_l][0]<<"";//被À?注Á¡é释º¨ª掉Ì?的Ì?调Ì¡Â试º?信?息¡é

for(int a=0;a<3;a++)//将?使º1用®?过y的Ì?进?程¨¬放¤?到Ì?前¡ã面?去¨£¤

data[max_l][a]=data[k][a];

}

else//没?有®D进?程¨¬能¨¹够?放¤?到Ì?服¤t务?器¡Â内¨²

{

delete x;//下?一°?个?服¤t务?器¡Â

cout<<endl;//被À?注Á¡é释º¨ª掉Ì?的Ì?调Ì¡Â试º?信?息¡é

server*x=new server();

k--;//重?新?遍À¨¦历¤¨²上¦?一°?个?进?程¨¬

}

}

delete x;

cout<<endl;//被À?注Á¡é释º¨ª掉Ì?的Ì?调Ì¡Â试º?信?息¡é

cout<<"使º1用®?服¤t务?器¡Â数ºy量¢?的Ì?一°?个?较?小?值¦Ì为a:"<<server::quantity<<"个?"<<endl;

return 0;

}