实验报告三：内部模块化的命令行菜单小程序V2.0

实验报告三：内部模块化的命令行菜单小程序V2.0

学号：SA17225091

1.实验内容

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:

遵守代码风格规范，参考借鉴代码设计规范的一些方法；
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。

2.实验过程

下载克隆版本库到本地 创建目录lab3



编写linklist.h



编写linklist.c



编写menu.c

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "linklist.h"

int Help();
int Addition();
int Fact();
int SleepCmd();
int EchoCmd();
int TimeCmd();
int Quit();

#define CMD_MAX_LEN 128
#define DESC_LEN 1024
#define CMD_NUM 10

static tDataNode head[] =
{
{"help", "This is a help cmd.", Help, &head[1]},
{"version", "Menu program v1.0.", NULL, &head[2]},
{"add", "Addition for two integer.", Addition, &head[3]},
{"author", "The author of this program is a good person.", NULL, &head[4]},
{"fact", "Factorial for one integer.", Fact, &head[5]},
{"sleep", "Sleep several seconds by input value.", SleepCmd, &head[6]},
{"echo", "Show what you input in the command line.", EchoCmd, &head[7]},
{"time", "Show the system time.", TimeCmd, &head[8]},
{"quit", "Quit from menu.", Quit, NULL}
};

int main()
{
char cmd[CMD_MAX_LEN];

Help();
printf("\n");
while (1)
{
printf("Please input a cmd: \n>");
scanf("%s", cmd);
tDataNode *p = FindCmd(head, cmd);
if (p == NULL)
{
printf("You have entered a wrong cmd.\n");
printf("Please use 'help' to get the help!\n\n");
continue;
}
printf("%s - %s\n", p -> cmd, p -> desc);
if (p -> handler != NULL)
p -> handler();
printf("\n");
}
return 0;
}

/* Call ShowAllCmd() in module linklist to implement Help(). */
int Help()
{
ShowAllCmd(head);

return 0;
}

/* Ask the user to input two integers and compute its addition results where no error detection. */
int Addition()
{
int addnum1, addnum2;

printf("Please input two numbers.\n");
printf("Use 'Blank' or 'Enter' to divide the two numbers.\n");
scanf("%d", &addnum1);
scanf("%d", &addnum2);
printf("The answer of these two numbers is %d.\n", addnum1 + addnum2);

return 0;
}

int Fact()
{
int factnum, factans;

factans = 1;
printf("Please input a number you want to compute factorial(less than 31).\n");
scanf("%d", &factnum);

//Use iteration to compute factorial
if (factnum < 0)
printf("Wrong input, abort!\n");
else
{
while (factnum >= 1)
{
factans *= factnum;
--factnum;
}
}
printf("The answer is %d.\n", factans);

return 0;
}

/* Ask the user how many seconds they want to sleep and notice the user every second. */
int SleepCmd()
{
int i, sleeptime;

printf("Please input the time you want to sleep(better smaller one):\n");
scanf("%d", &sleeptime);
for (i = 0; i < sleeptime; ++i)
{
printf("I have slept %d seconds.\n", i);
sleep(1);
}
printf("Time to wake up.\n");

return 0;
}

/* Output what the user input before the user input EOF. */
int EchoCmd()
{
char ch;

printf("Please end your input with 'CTRL' + 'D'(means EOF in UNIX/LINUX).\n");
while ((ch = getchar()) != EOF)
printf("%c", ch);
printf("\n");

return 0;
}

/* Call ShowLocalTime() in module linklist to implement TimeCmd(). */
int TimeCmd()
{
ShowLocalTime();

return 0;
}

int Quit()
{
printf("Bye, see you!\n");
exit(0);
}

运行测试





提交代码到版本库



3 实验心得

明白了程序模块化的重要性

明白了代码重用的好处

对c编码调试 Ubuntu基本操作 Git操作更加熟练

4 实验总结

学习了如何将程序模块化，以及软件开发过程中的常见原则，受益良多

github地址：https://github.com/lgddd/gr_lab/lab3