SA17225160_李伯威(libowei)_高级软工第三次实验报告

一、实验要求

实现内部模块化的命令行菜单小程序V2.0

注意代码的业务逻辑和数据存储之间的分离，即将系统抽象为两个层级：菜单业务逻辑和菜单数据存储

要求:

1. 遵守代码风格规范，参考借鉴代码设计规范的一些方法；
2. 代码的业务逻辑和数据存储使用不同的源文件实现，即应该有2个.c和一个.h作为接口文件。

二、实验过程

1.clone并进入共享文件夹

2.建立指定的lab3文件夹

3.用vim编辑linklist.c文件

#include <stdio.h>#include <stdlib.h>#include "linklist.h"static tDataNode head[] ={    {"help","This is Help",help,&head[1]},    {"add","This is Add  input 2 integers!",add,&head[2]},    {"sub","This is  Sub  input 2 integers!",sub,&head[3]},    {"multiple","This is Multiple input 2 integers!",multiple,&head[4]},    {"divide","This is Divide input 2 integers!",divide,&head[5]},    {"quit","This is Quit will quit from program!",quit,NULL}};tDataNode* FindCmd(tDataNode* head,char* cmd){    if(head==NULL||cmd==NULL)    {        return NULL;    }    tDataNode* p=head;    while(p!=NULL&&strcmp(p->cmd,cmd)!=0)    {        p=p->next;    }    if(p==NULL)    {        return NULL;    }    return p;}int ShowAllCmd(tDataNode* head){    printf("Menu List:\n");    tDataNode*p=head;    while(p!=NULL)    {        printf("%s - %s\n",p->cmd,p->desc);        p=p->next;    }    return 0;}int Help(){    ShowAllCmd(head);}int Add(){    printf("please input two integers\n");    int x,y;    scanf("%d%d",&x,&y);    int result=x+y;    printf("%d\n",result);    return 0;}int Sub(){    printf("please input two integers\n");    int x,y;    scanf("%d%d",&x,&y);    int result=x-y;    printf("%d\n",result);    return 0;}int Multiple(){    printf("please input two integers\n");    int x,y;    scanf("%d%d",&x,&y);    int result=x*y;    printf("%d\n",result);    return 0;}int Divide(){    printf("please input two integers\n");    int x,y;    scanf("%d%d",&x,&y);    int result=x/y;    printf("%d\n",result);    return 0;}int Quit(){    exit(0);}

4.编辑linklist.h文件

#include <stdio.h>#include <stdlib.h>typedef struct DataNode{    char* cmd;    char* desc;    int(*handler)();    struct DataNode* next;}tDataNode;tDataNode* FindCmd(tDataNode* head,char* cmd);int ShowAllCmd(tDataNode* head);int help();int quit();int add();int sub();int multiple();int divide();

5.编写menu.c文件

#include <stdio.h>#include <stdlib.h>#include "linklist.h"static tDataNode head[] ={    {"help","This is Help",help,&head[1]},    {"add","This is Add  input 2 integers!",add,&head[2]},    {"sub","This is  Sub  input 2 integers!",sub,&head[3]},    {"multiple","This is Multiple input 2 integers!",multiple,&head[4]},    {"divide","This is Divide input 2 integers!",divide,&head[5]},    {"quit","This is Quit will quit from program!",quit,NULL}};int main(){    while(1)    {        char cmd[128];        printf("please put in a cmd\n");        scanf("%s",cmd);        tDataNode *p=FindCmd(head,cmd);        if(p==NULL)        {            printf("wrong command!\n");            continue;        }        printf("%s:%s\n",p->cmd,p->desc);        if(p->handler!=NULL)        {            p->handler();        }    }}

6.编译menu.c以及linklist.c文件

7.运行结果

8.上传github

9.github的上传情况

10.我的github地址

https://github.com/lili0001002/cs122/tree/master/lab3

总结:

• 学习了模块化的编程思想
• 提高了menu程序的重用性
• 掌握学习了c程序的编译调试方法
• KISS(keep it simple & stupid)
• using design to frame the code(matching design with implementation)
• including pseuducode