实验一

代码如下:

#include<stdio.h>

#include<string.h>
void main() /*主函数*/
{
char *b[11]={"dir","cd","md","rd","cls","date","time","ren","copy","help", "quit"}; /*指针数组存储关键字*/
int pan(char ch1[],char *j[11]);
char a[10],*p=a;
printf("Welcome.........
Pleas enter a command!
Enter 'quit' to quit.
For help,Enter 'help'.
");
c1: printf("c:>$");
scanf("%s",a);
pan(p,b); /*函数调用*/
if(strcmp(a,b[10])!=0) /*比较输入的字符串是否quit结束命令*/ goto c1;
else printf("out of work!!
");
}
int pan(char ch1[],char *j[11]) /*子函数*/
{
int i;
for( i=0;i<11;i++)
if(strcmp(ch1,j[i])==0) /*比较输入的字符串与数组的关键字是否相等*/
{
switch(i)
{
case 0:printf("command name is dir.
It's function is list file.
It's an internal command.
Volume in drive K gas no label.
Volume Serial Number is 60F0-6C24

");break;
case 1:printf("command name is cd.
It's function is change directory.
It's an internal command.
");break;
case 2:printf("command name is md.
It's function is creat a new directory.
It's an internal command.
");break;
case 3:printf("command name is rd.
It's function is delete a directory which is empty.
It's an internal command.
");break;
case 4:printf("command name is cls.
It's function is clean screen
It's an internal command.
");break;
case 5:printf("command name is date.
It's function is show date.
It's an internal command.
");break;
case 6:printf("command name is time.
It's function is shio time.
It's an internal command.
");break;
case 7:printf("command name is ren.
It's function is rename a file.
It's an internal command.
");break;
case 8:printf("command name is copy.
It's function is copy files.
It's an internal command.
");break;
case 9:printf("dir	cd	md	rd	cls
date	time	ren	copy
Enter " quit" to quit this program!!
");break;
case 10:printf("Thanks for using it,bye!!
");break;
}
return 1;}
printf("No this one!!
Not a internal commal.
");return 0;
}

实验一 命令解释程序的编写

   一、目的和要求

                1. 实验目的

               （1）掌握命令解释程序的原理；

               （2）掌握简单的DOS调用方法；

               （3）掌握C语言编程初步。

2．实验要求

编写类似于DOS，UNIX的命令行解释程序

（1）自行定义系统提示符

（2）自定义命令集（8-10个）

（3）用户输入HELP以查找命令的帮助

（4）列出命令的功能，区分内部还是外部命令

（5）用户输入QUIT退出

（6）内部命令有dir, cd, md, rd, cls, date, time, ren, copy等。

二、实验内容

根据教师指定的实验课题，完成设计、编码、测试工作。

三、实验环境

1．PC微机

2．Windows 操作系统

3．C/C++程序开发集成环境

四、实验原理及核心算法参考程序段

显示程序提示信息；

While(1)

｛ 显示提示符；

接收键盘的字符串；

判断是否quit程序退出指令，是则退出；

判断是否内部命令，并给出相应的信

实验总结 : C语言忘的差不多了 不过这一次又可以重新回顾一下 C语言 颇有感觉 不会的地方查找了 网上的地方