对于图书管理系统的完善————管理员权限的添加
来源：同学在大一下的期末大作业
运行环境：VS
运行结果截图：
程序代码：
//book类
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#define _CRT_SECURE_NO_WARNINGS
#include "book.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include<fstream>
#include<iostream>
using namespace std;
book::book()
{
int i = 0;
char* result = NULL;
FILE* fpbook;
fpbook = fopen("book.txt", "r");
while (fgets(str, 1020, fpbook) != NULL) {
sscanf(str, "%s %s %s %s %s", &number[i], &book_name[i], &author[i], &pub[i], &price[i]);
i += 1;
}
read();
book_num = i;
}
int book::BookNum()
{
return book_num;
}
void book::show_book()
{
for (int i = 0; i < book_num; i++)
{
printf("%s %s %s %s %s\n", &number[i], &book_name[i], &author[i], &pub[i], &price[i]);
}
}
void book::searchBook()
{
char name_book[100];
printf("请输入要查找书名：\n");
scanf_s("%s", name_book, 100);
for (int i = 0; i < book_num; i++)
{
if (strcmp(name_book, book_name[i]) == 0)
printf("%s %s %s %s\n", &number[i], &book_name[i], &author[i], &pub[i]);
}
}
int book::buy_book(char* str)
{
int m;
int price;
printf("请输入购书序号：");
scanf_s("%d", &m);
m = m + 1;
fstream fp;
fp.open("buy.txt", ios::out | ios::app);
//&buy_number[m], &buy_book_name[m], &buy_author[m], &buy_pub[m], &buy_price[m], &buy_name[m]);
fp << buy_number[m] << " " << buy_book_name[m] << " " << buy_author[m] << " " << buy_pub[m] << " " << buy_price[m] << " " << str << endl;
printf("购买成功");
fp.close();
price = atoi(buy_price[m]);
return price;
}
void book::shou_buy()
{
read();
for (int m = 0; m < buy_num; m++)
{
printf("%s %s %s %s %s %s\n", &buy_number[m], &buy_book_name[m], &buy_author[m], &buy_pub[m], &buy_price[m], &buy_name[m]);
}
}
void book::read()
{
FILE* fp_buy;
fp_buy = fopen("buy.txt", "r");
int m = 0;
while (fgets(str, 1020, fp_buy) != NULL) {
sscanf(str, "%s %s %s %s %s %s", &buy_number[m], &buy_book_name[m], &buy_author[m], &buy_pub[m], &buy_price[m], &buy_name[m]);
m += 1;
}
buy_num = m;
}
//buyer类
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#define _CRT_SECURE_NO_WARNINGS
#include "buyer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fstream>
#include <iostream>
using namespace std;
buyer::buyer()
{
int i = 0;
FILE* fp_buyer;
fp_buyer = fopen("buyer.txt", "r");
while (fgets(str, 1024, fp_buyer) != NULL)
{
sscanf(str, "%s %s %s %s", &name[i], &num[i], &address[i], yonghuclass[i]);
i += 1;
}//读入文本数据
buyer_num = i;
person_num = i;//记录长度
}
void buyer::show_buyer(int i)
{
char rbuyer[100];
ifstream infile_buyer;
infile_buyer.open("buyer.txt", ios::in);
if (!infile_buyer.is_open())
{
cout << "读取文件失败" << endl;
return;
}
infile_buyer.getline(rbuyer, 100);
cout << "姓名" << " " << "序号" << " " << "地址" << " " << "用户级别" << endl;
cout << rbuyer<<endl;
infile_buyer.close();
}
void buyer::show_person()
{
ifstream infile;
infile.open("person.txt", ios::in);
if (!infile.is_open())
{
cout << "读取文件失败" << endl;
return;
}
char buf[1024];
while (infile.getline(buf, sizeof(buf)))
{
cout << buf << endl;
}
}
void buyer::getpay_buyer(int price)
{
cout << "购书人需要付费: " << price << endl;
}
//honoured guest类
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#define _CRT_SECURE_NO_WARNINGS
#include "honoured_guest.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fstream>
#include <iostream>
using namespace std;
honoured_guest::honoured_guest()
{
int i = 0;
FILE* fp_hguest;
fp_hguest = fopen("hguest.txt", "r");
while (fgets(str, 1024, fp_hguest) != NULL)
{
sscanf(str, "%s %s %s %s %s", &name[i], &num[i], &hguest[i], &address[i], yonghuclass[i]);
i += 1;
}//读入文本数据
hguest_num = i;//记录长度
}
void honoured_guest::show_hguest(int i)
{
char rhguest[100];
ifstream infile_hguest;
infile_hguest.open("hguest.txt", ios::in);
if (!infile_hguest.is_open())
{
cout << "读取文件失败" << endl;
return;
}
infile_hguest.getline(rhguest, 100);
cout << "姓名" << " " << "序号" << " " << "地址" << " " << "用户级别" << endl;
cout << rhguest << endl;
infile_hguest.close();
}
void honoured_guest::getpay_hguest(int price)
{
int a = 0.3;
price = (1 - a) * price;
cout << "购书人需要付费: " << price << endl;
}
//主函数
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#define _CRT_SECURE_NO_WARNINGS//防止函数报错
#include <iostream>
#include "login.h"
using namespace std;
void face()//面板函数
{
cout << "-------------------------------------" << endl;
cout << "###########网上购书平台###########" << endl;
cout << " 1.登录" << endl;
cout << " 2.注册" << endl;
cout << " 3.退出" << endl;
}
int main()
{
int key;//选择输入
login log;//定义login类的对象log
while (1)
{
face();//显示面板
cin >> key;//输入选项
switch (key)
{
case 1:
{
log.log();//登录函数
break;
}
case 2:
{
log.getlogin();//注册函数
break;
}
case 3:
{
goto exit;//跳出循环
}
}
}
exit:
printf("系统退出");//退出系统
return 0;
}
//member类
点击查看代码
#define _CRT_SECURE_NO_WARNINGS
#include "member.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fstream>
#include <iostream>
using namespace std;
member::member()
{
int i = 0;
FILE* fp_member;
fp_member = fopen("member.txt", "r");
while (fgets(str, 1024, fp_member) != NULL)
{
sscanf(str, "%s %s %s %s %s", &name[i], &num[i],yonghuclass[i], &address[i], &members[i]);
i += 1;
}//读入文本数据
member_num = i;//记录长度
}
void member::show_member(int i)
{
char rmember[100];
ifstream infile_member;
infile_member.open("member.txt", ios::in);
if (!infile_member.is_open())
{
cout << "读取文件失败" << endl;
return;
}
infile_member.getline(rmember, 100);
cout << "姓名" << " " << "序号" << " " << "地址" << " " << "用户级别" << endl;
cout << rmember << endl;
infile_member.close();
}
void member::getpay_member(int price,int i)
{
if (strcmp("1", members[i]) == 0)
{
price = price * 0.9;
}
else if (strcmp("2", members[i]) == 0)
{
price = price * 0.8;
}
else if (strcmp("3", members[i]) == 0)
{
price = price * 0.7;
}
else if (strcmp("4", members[i]) == 0)
{
price = price * 0.6;
}
else if (strcmp("5", members[i]) == 0)
{
price = price * 0.5;
}
cout << "购书人需要付费: " << price << endl;
}
主要问题列表：
作为一个图书管理系统，只有用户端的使用界面，没有面向管理员的界面。因而选择添加管理员权限，可以调用其他的类，查看图书买卖入库记录
更改后代码
重构后界面展示
总结：
更改别人的代码确实不是一件简单的事，最为关键的是要搞清楚对方写代码时的逻辑，这样才能可以进行一定程度上的更改；除此之外，我也意识到了代码格式的重要性，只有比较好的代码格式，才能保证可读性，这样才能方便以后的修改和观看，这次的经历会使我以后更加注重这方面的问题
