#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
#define N 100
struct miniOS
{int a;//记录是内部命令还是外部命令char command[10];//记录命令char YON_parameter[20];//记录该命令是否需要参数char commandstate[100];//陈述命令的功能
};
struct miniOS os[N];
void judge(char str[],int n)//判断命令的对错
{int i;for(i=0;i<=n;i++){if(stricmp(str,"help")==0){for(i=0;i<=n;i++){printf("%s\t%-34s%-20s\n",os[i].command,os[i].commandstate,os[i].YON_parameter);}break;}if((stricmp(str,os[i].command)==0)&&(os[i].a==1)){printf("\"%s\" \"%s\" 是内部命令，输入正确!\n",os[i].command,os[i].YON_parameter);printf("该命令的作用是：%s\n",os[i].commandstate);break;}else if((stricmp(str,os[i].command)==0)&&(os[i].a==0)){printf("\"%s\" \"%s\" 是外部命令，输入正确!\n",os[i].command,os[i].YON_parameter);printf("该命令的作用是：%s\n",os[i].commandstate);break;}else if((stricmp(str,os[i].command)!=0)&&(i==n)){printf("'%s'不是内部或外部命令，也不是可运行的程序\n或批处理文件\n",str);}}
}
void command_function(char str[],int n)//命令功能
{int i;for(i=0;i<=n;i++){if(stricmp(str,"cls")==0){system("cls");//清屏
        }}
}int file()//文件的读取
{int i,n;FILE *fp;fp=fopen("cmd.txt","r+");for(i=0;!feof(fp);i++){fscanf(fp,"%s%s%s%d",os[i].command,os[i].commandstate,os[i].YON_parameter,&os[i].a);n=i;}fclose(fp);return n;
}
main()
{ int n;char str[N];printf("Microsoft Windows [版本 6.1.7601 ]\n");printf("版本所有 <c> 2009 Microsoft Corporation。保留所有权利\n\n");n=file();while(1){printf("C:\\Users\\Administrator.USER-20151120JI>");gets(str);judge(str,n);command_function(str,n);printf("\n");}
}