[c++]代码库
#include<stdio.h>
#include<iostream.h>
#include<string.h>
#include<iomanip.h>
const int MAXJOB=100;//定义表最大记录数
typedef struct node {
int start;
int length;
char tag[20];
} job;
job frees[MAXJOB];//定义空闲区表
int free_quantity;
job occupys[MAXJOB];//定义已分配区表
int occupy_quantity;
//初始化函数
void initial() {
int i;
for ( i=0; i<MAXJOB; i++ ) {
frees[i].start=-1;
frees[i].length=0;
strcpy ( frees[i].tag,"free" );
occupys[i].start=-1;
occupys[i].length=0;
strcpy ( occupys[i].tag,"" );
}
free_quantity=0;
occupy_quantity=0;
}
//读数据函数
int readData() {
FILE *fp;
char fname[20];
cout<<"请输入初始空闲表文件名:";
cin>>fname;
if ( ( fp=fopen ( fname,"r" ) ) ==NULL ) {
cout<<"错误,文件打不开,请检查文件名"<<endl;
} else {
while ( !feof ( fp ) ) {
fscanf ( fp,"%d,%d",&frees[free_quantity].start,&frees[free_quantity].length );
free_quantity++;
}
return 1;
}
return 0;
}
//sort
void sort() {
int i,j,p;
for ( i=0; i<free_quantity-1; i++ ) {
p=i;
for ( j=i+1; j<free_quantity; j++ ) {
if ( frees[j].start<frees[p].start ) {
p=j;
}
}
if ( p!=i ) {
frees[free_quantity]=frees[i];
frees[i]=frees[p];
frees[p]=frees[free_quantity];
}
}
}
//显示函数
void view() {
int i;
cout<<endl<<"----------------------------------------------------------"<<endl;
cout<<"当前空闲表:"<<endl;
cout<<"起始地址 长度 状态"<<endl;
for ( i=0; i<free_quantity; i++ ) {
cout.setf ( 2 );
cout.width ( 12 );
cout<<frees[i].start;
cout.width ( 10 );
cout<<frees[i].length;
cout.width ( 8 );
cout<<frees[i].tag<<endl;
}
cout<<endl<<"----------------------------------------------------------"<<endl;
cout<<"当前已分配表:"<<endl;
cout<<"起始地址 长度 占用作业名"<<endl;
for ( i=0; i<occupy_quantity; i++ ) {
cout.setf ( 2 );
cout.width ( 12 );
cout<<occupys[i].start;
cout.width ( 10 );
cout<<occupys[i].length;
cout.width ( 8 );
cout<<occupys[i].tag<<endl;
}
}
//最先适应分配算法
void earliest() {
char job_name[20];
int job_length;
int i,j,flag,t;
cout<<"请输入新申请内存空间的作业名和空间大小:";
cin>>job_name;
cin>>job_length;
flag=0;
for ( i=0; i<free_quantity; i++ ) {
if ( frees[i].length>=job_length ) {
flag=1;
}
}
if ( flag==0 ) {
cout<<endl<<"Sorry,当前没有能满足你申请长度的空闲内存,请稍候再试"<<endl;
} else {
t=0;
i=0;
while ( t==0 ) {
if ( frees[i].length>=job_length ) {
t=1;
}
i++;
}
i--;
occupys[occupy_quantity].start=frees[i].start;
strcpy ( occupys[occupy_quantity].tag,job_name );
occupys[occupy_quantity].length=job_length;
occupy_quantity++;
if ( frees[i].length>job_length ) {
frees[i].start+=job_length;
frees[i].length-=job_length;
} else {
for ( j=i; j<free_quantity-1; j++ ) {
frees[j]=frees[j+1];
}
free_quantity--;
cout<<"内存空间成功:)"<<endl;
}
}
}
//最优适应分配算法
void excellent() {
char job_name[20];
int job_length;
int i,j,flag,t;
cout<<"请输入新申请内存空间的作业名和空间大小:";
cin>>job_name;
cin>>job_length;
flag=0;
for ( i=0; i<free_quantity; i++ ) {
if ( frees[i].length>=job_length ) {
flag=1;
}
}
if ( flag==0 ) {
cout<<endl<<"Sorry,当前没有能满足你申请长度的空闲内存,请稍候再试"<<endl;
} else {
t=0;
i=0;
while ( t==0 ) {
if ( frees[i].length>=job_length ) {
t=1;
}
i++;
}
i--;
for ( j=0; j<free_quantity; j++ ) {
if ( ( frees[j].length>=job_length ) && ( frees[j].length<frees[i].length ) ) {
i=j;
}
}
occupys[occupy_quantity].start=frees[i].start;
strcpy ( occupys[occupy_quantity].tag,job_name );
occupys[occupy_quantity].length=job_length;
occupy_quantity++;
if ( frees[i].length>job_length ) {
frees[i].start+=job_length;
frees[i].length-=job_length;
} else {
for ( j=i; j<free_quantity-1; j++ ) {
frees[j]=frees[j+1];
}
free_quantity--;
cout<<"内存空间成功:)"<<endl;
}
}
}
//最坏适应算法
void worst() {
char job_name[20];
int job_length;
int i,j,flag,t;
cout<<"请输入新申请内存空间的作业名和空间大小:";
cin>>job_name;
cin>>job_length;
flag=0;
for ( i=0; i<free_quantity; i++ ) {
if ( frees[i].length>=job_length ) {
flag=1;
}
}
if ( flag==0 ) {
cout<<endl<<"Sorry,当前没有能满足你申请长度的空闲内存,请稍候再试"<<endl;
} else {
t=0;
i=0;
while ( t==0 ) {
if ( frees[i].length>=job_length ) {
t=1;
}
i++;
}
i--;
for ( j=0; j<free_quantity; j++ ) {
if ( ( frees[j].length>=job_length ) && ( frees[j].length>frees[i].length ) ) {
i=j;
}
}
occupys[occupy_quantity].start=frees[i].start;
strcpy ( occupys[occupy_quantity].tag,job_name );
occupys[occupy_quantity].length=job_length;
occupy_quantity++;
if ( frees[i].length>job_length ) {
frees[i].start+=job_length;
frees[i].length-=job_length;
} else {
for ( j=i; j<free_quantity-1; j++ ) {
frees[j]=frees[j+1];
}
free_quantity--;
cout<<"内存空间成功:)"<<endl;
}
}
}
//撤消作业
void finished() {
char job_name[20];
int i,j,flag,p=0;
int start;
int length;
cout<<"请输入要撤消的作业名:";
cin>>job_name;
flag=-1;
for ( i=0; i<occupy_quantity; i++ ) {
if ( !strcmp ( occupys[i].tag,job_name ) ) {
flag=i;
start=occupys[i].start;
length=occupys[i].length;
}
}
if ( flag==-1 ) {
cout<<"没有这个作业名"<<endl;
} else {
//加入空闲表
for ( i=0; i<free_quantity; i++ ) {
if ( ( frees[i].start+frees[i].length ) ==start ) {
if ( ( ( i+1 ) <free_quantity ) && ( frees[i+1].start==start+length ) ) {
frees[i].length=frees[i].length+frees[i+1].length+length;
for ( j=i+1; j<free_quantity; j++ ) {
frees[j]=frees[j+1];
}
free_quantity--;
p=1;
} else {
frees[i].length+=length;
p=1;
}
}
if ( frees[i].start== ( start+length ) ) {
frees[i].start=start;
frees[i].length+=length;
p=1;
}
}
if ( p==0 ) {
frees[free_quantity].start=start;
frees[free_quantity].length=length;
free_quantity++;
}
//删除分配表中的该作业
for ( i=flag; i<occupy_quantity; i++ ) {
occupys[i]=occupys[i+1];
}
occupy_quantity--;
}
}
//显示版权信息函数
void version() {
cout<<endl<<endl;
cout<<" ┏━━━━━━━━━━━━━━━━━━━━━━━┓"<<endl;
cout<<" ┃ 可变分区存储管理模拟系统 ┃"<<endl;
cout<<" ┠───────────────────────┨"<<endl;
cout<<" ┃ (c)All Right Reserved Neo ┃"<<endl;
cout<<" ┃ sony006@163.com ┃"<<endl;
cout<<" ┃ version 2004 build 1122 ┃"<<endl;
cout<<" ┗━━━━━━━━━━━━━━━━━━━━━━━┛"<<endl;
cout<<endl<<endl;
}
void main() {
int flag=0;
int t=1;
int chioce=0;
version();
initial();
flag=readData();
while ( flag==1 ) {
sort();
cout<<endl<<endl<<"========================================================="<<endl;
cout<<" 可变分区存储管理模拟系统"<<endl;
cout<<"========================================================="<<endl;
cout<<" 1.申请空间 2.撤消作业 3.显示空闲表和分配表 0.退出"<<endl;
cout<<"请选择:";
cin>>chioce;
switch ( chioce ) {
case 1:
//换算法请换下一句调用
earliest();
break;
case 2:
finished();
break;
case 3:
view();
break;
case 0:
flag=0;
break;
default:
cout<<"选择错误!"<<endl;
}
}
}
初级程序员
by: 我的程序员之路 发表于:2013-05-05 20:18:45 顶(2) | 踩(0) 回复
楼主,看了这么多代码,感觉你各种编程语言都很强耶
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